CN107061052A - LNG supply systems - Google Patents
LNG supply systems Download PDFInfo
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- CN107061052A CN107061052A CN201611104343.8A CN201611104343A CN107061052A CN 107061052 A CN107061052 A CN 107061052A CN 201611104343 A CN201611104343 A CN 201611104343A CN 107061052 A CN107061052 A CN 107061052A
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- lng
- natural gas
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- diesel
- engine
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
A kind of natural gas supply system of high-power LNG Diesel Dual-Fuel Engines, including stocking system, feed system and control system.Wherein, stocking system is connected with feed system, and feed system is connected with stocking system and engine simultaneously, and control system is communicated to connect with stocking system, feed system and engine respectively；The natural gas supply system of the present invention has significant economic benefit and social benefit, can not only save substantial amounts of fuel cost for enterprise, and can substantially reduce the exhaust pollution of engine.
Description
Technical field
Supplied the present invention relates to the natural gas of engine art, more particularly to a kind of high-power LNG- Diesel Dual-Fuel Engines
Answer system.
Background technology
The high-power engine that current mine truck, engine or ship are used is diesel engine.Not only operation cost compared with
Height, and exhaust contaminant contains substantial amounts of nitrogen oxides, particle, sulfide etc., it is difficult to administer, cause environmental pollution.
(final) rule of EPA Tier4i (transition) and Tier4 come into force respectively at 2011 and 2014-2015
Tightened up discharge standard is determined, requirement is not exempted to mining big-block engine.Engine Company must study new technology,
On the premise of equipment, operation and the production cost of complete-system vendor and end user is not influenceed, the discharge of engine is set to meet
Tightened up laws and regulations requirement.
China Railway is one of China Diesel consumption rich and influential family.Increasingly stricter energy-conserving and environment-protective requirement, to internal combustion engine
The requirement of car and its diesel engine is improved constantly, and the task of Looking For Substitutions Of Oil becomes more and more urgent.
Pollution of the ship to environment is gradually paid close attention to, and each side is constantly lifted to ship environmental requirement, and China also puts into effect
Ship emission control area embodiment, it is intended to reduce the pollution that ship discharge is caused to air.
At present, natural gas is the optimal selection for substituting conventional engine fuel (diesel oil, gasoline).Natural gas has good section
Energy environment protecting, anti-knock properties are good, and burning is complete, does not tie carbon.Natural gas resource enriches, and is the most fast energy of increase of production in the world
Source.Gas economic is good, and its cost is less than conventional engine fuel.Natural gas security is good, because density is small, once occur
Leakage, can disappear in atmosphere quickly.Natural gas is compressed to be cooled into LNG (liquefied natural gas), is greatly improved energy close
Degree, is readily transported.
By literature search, find relevant with high-power LNG- Diesel Dual-Fuel Engines natural gas supply system at present
Patent, is largely peculiar to vessel, or is related to a part for natural gas supply system, or is related to lower-powered engine.It is domestic
LNG- Diesel Dual-Fuel Engine natural gas supply systems have been applied and related report on low-power equipment, but high-power
System is still in initial stage, application or blank in fields such as mine, railways.And existing patent does not give big work(also
Rate LNG- Diesel Dual-Fuel Engines provide a set of perfect natural gas supply system, and also engine operation process is not realized
Whole Multi-azimuth monitoring, thus be unfavorable for engine health and stably work.
The content of the invention
It is double it is an object of the invention to provide a kind of high-power LNG- diesel oil for above-mentioned problems of the prior art
The natural gas supply system of engine fuel, the system can guarantee that original performance of engine, and make high-power LNG- diesel oil double
Engine fuel is successfully applied to the fields such as mine, railway, ship.
In order to realize foregoing invention purpose, the technical solution adopted by the present invention is as follows：
A kind of natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines, including stocking system, feed system
And control system, wherein, stocking system is connected with feed system, and feed system is connected with stocking system and engine simultaneously,
Control system is communicated to connect with stocking system, feed system and engine respectively；
Wherein, control system includes LNG controllers, and be connected respectively with LNG controllers sensor, display, open
Close；Stocking system include LNG storage tank, and be connected respectively with LNG storage tank LNG magnetic valves, LNG liquid level sensors, LNG pressure
Sensor, LNG magnetic valves, LNG liquid level sensors and LNG pressure sensor are communicatively connected to LNG controllers respectively；Feed system
Including the gasifier being linked in sequence successively, natural gas temperature sensor one, diffusion valve, natural gas flowmeter, electromagnetic valve for natural gas,
It is hand off valve, pressure regulator, cleaner, natural gas temperature sensor two, natural pressure force snesor, intelligent metering valve, integrated
Air throttle, blender and diesel oil flowmeter, wherein natural gas temperature sensor one, natural gas flowmeter, electromagnetic valve for natural gas,
Natural gas temperature sensor two, natural pressure force snesor, intelligent metering valve, integrated air throttle and diesel oil flowmeter lead to respectively
Letter is connected to LNG controllers.
Further, the switch control diesel fuel mode of control system or the selection of dual fuel mode.
Further, under dual fuel mode, the ECU cooperating that LNG controllers are carried with engine, collection
Calculate parameters of natural gas and engine operating parameter.
Further, LNG controllers automatically control LNG magnetic valves, electromagnetic valve for natural gas, intelligent metering valve and integrated section
The switch and aperture of valve.
Further, the sensor of control system includes air inlet pressure sensor, boost-pressure sensor, inlet manifold pressure
Force snesor, MATS, cooling-water temperature transmitter, crankshaft rotational speed sensor, camshaft speed sensor,
Exhaust gas temperature sensor, detonation sensor.
Further, air inlet pressure sensor, boost-pressure sensor, intake manifold pressure sensor, inlet manifold temperature
It is two to spend sensor.
Further, the gasifier of feed system, natural gas temperature sensor one, integrated air throttle, blender are two
It is individual.
Further, the LNG storage tank of stocking system, LNG magnetic valves, LNG liquid level sensors, LNG pressure sensor are
Two.
Further, LNG storage tank is equipped with and is provided with pressure adjusting module, fills module, level gauging module, feed flow module
With vacuum explosion module.
Further, feed system also includes gas pipeline and coolant pipeline.
Install the high-power LNG- diesel dual-fuels hair of the present invention additional on the large scale equipment such as mine truck or engine
The natural gas supply system of motivation, repacking is simple, initially puts into low.
The natural gas supply system of the present invention has significant economic benefit.It is lower than diesel oil very in Chinese Gas Price
It is many, when natural gas supply system is widely used in high-power mining equiment, railway locomotive (diesel locomotive), ship, petroleum system
The large-sized diesel motor relevant device such as equipment, can save substantial amounts of fuel cost for enterprise.Understand Zhong Mei groups according to investigations to exist
Open coal mine Pingshou annual diesel-fuel consumption of An-tai-bao opening mine of Largest In China reaches 1,500,000,000 yuan, if using the present invention's
Natural gas supply system, according to current LNG and diesel oil price, it is assumed that profit margin is 20%, then can just save 3 every year
Hundred million yuan of diesel oil costs.
The natural gas supply system of the present invention has significant social benefit.Because combustion of natural gas is nearly free from particle
Thing, can be substantially reduced using the exhaust pollution of the engine of natural gas supply system.Carbon emission amount is also decreased simultaneously.Root
The data provided according to the Chinese carbon emission calculators of BP, each LNG- diesel dual-fuels car can subtract every year than pure gasoline car, diesel vehicle
Few CO2About 60 tons of discharge, was such as calculated, each car can reduce CO according to 8 years validity periods2About 480 tons of discharge.
Brief description of the drawings
Fig. 1 is the schematic diagram of the natural gas supply system of the high-power LNG- Diesel Dual-Fuel Engines of the present invention；
Fig. 2 shows for the LNG storage tank of the natural gas supply system of the high-power LNG- Diesel Dual-Fuel Engines of the present invention
It is intended to.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right with reference to embodiment and accompanying drawing
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
The natural gas supply system for the high-power LNG- Diesel Dual-Fuel Engines that the present invention is provided is (hereinafter referred to as natural
Gas supply system), including stocking system, feed system and control system.Wherein, stocking system is connected with feed system, supply
System is connected with stocking system and engine simultaneously, and control system is logical with stocking system, feed system and engine respectively
Letter connection.Wherein, control system includes LNG controllers, and be connected respectively with LNG controllers sensor, display, open
Close；Stocking system include LNG storage tank, and be connected respectively with LNG storage tank LNG magnetic valves, LNG liquid level sensors, LNG pressure
Sensor, LNG magnetic valves, LNG liquid level sensors and LNG pressure sensor are communicatively connected to LNG controllers respectively；Feed system
Including the gasifier being linked in sequence successively, natural gas temperature sensor one, diffusion valve, natural gas flowmeter, electromagnetic valve for natural gas,
It is hand off valve, pressure regulator, cleaner, natural gas temperature sensor two, natural pressure force snesor, intelligent metering valve, integrated
Air throttle, blender, and diesel oil flowmeter.Wherein natural gas temperature sensor one, natural gas flowmeter, natural gas electromagnetism
Valve, natural gas temperature sensor two, natural pressure force snesor, intelligent metering valve, integrated air throttle and diesel oil flowmeter point
LNG controllers are not communicatively connected to.
Below in conjunction with accompanying drawing, the natural gas supply system to the present invention is described in detail.As shown in figure 1, stocking system
Including LNG storage tank-left side 1 and LNG storage tank-right side 2, LNG magnetic valves-left side 3 and LNG magnetic valves-right side 6, the LNG liquid level sensors-and of a left side 4
LNG liquid level sensors-the right side 7, LNG pressure sensor-left side 5 and LNG pressure sensor-right side 8.Wherein, LNG storage tank-left side 1 respectively with
A LNG magnetic valves-left side 3, a LNG liquid level sensors-left side 4, LNG pressure sensor-left side 5 are connected, and LNG magnetic valves-left side 3, LNG liquid levels
Sensor-left side 4, LNG pressure sensor-left side 5 are communicatively connected to the LNG controllers 45 of control system respectively；2 points of LNG storage tank-right side
It is not connected with LNG magnetic valves-right side 6, the LNG liquid level sensors-right side 7, LNG pressure sensor-right side 8, and LNG magnetic valves-right side 6, LNG
Liquid level sensor-right side 7, LNG pressure sensor-right side 8 are communicatively connected to the LNG controllers 45 of control system respectively.Wherein, LNG
The control of the LNG controllers 45 of controlled system is distinguished on magnetic valve-left side 3 and LNG magnetic valves-right side 6.LNG storage tank-left side 1 and LNG storages
The LNG of the storage of tank-right side 2 high pressure low temperature is as fuel, and the outside on LNG storage tank-left side 1 and LNG storage tank-right side 2 has been respectively arranged with guarantor
The tank case (not shown) of shield effect.
LNG storage tank-left side 1 and LNG storage tank-right side 2 are configured with identical.With reference to Fig. 2, only enter by taking LNG storage tank-left side 1 as an example
Row explanation.LNG storage tank-left side 1 is equipped with and is provided with pressure adjusting module, fills module, level gauging module, feed flow module and vacuum
Explosion module.Wherein, pressure adjusting module includes LNG pressure sensor-left side 5, economic valve PCV-1, main safety valve PSV-1, pair
Safety valve PSV-2, pipeline safety valve TSV-1, return-air interface CN-1, diffuse interface CN-2, return-air stop valve HCV-1, pressure gauge
PG-1, pressure gauge PG-2.Pressure in a LNG pressure sensor-left side 5 measurement LNG storage tank-left side 1 and by the pressure transmission of measurement extremely
LNG controllers 45；Economic valve PCV-1 use can save LNG；Three safety valves lead to when loine pressure is more than a threshold value
Cross return-air stop valve HCV-1, return-air interface CN-1, diffuse interface CN-2 deflation, safeguards system safety；Two pressure gauge display tubes
Road pressure.Filling module includes filling interface CN-3, filling stop valve HCV-2, fill check-valves CV-1.Operating personnel are by LNG
Filling gun, which is connected to, fills interface CN-3, and opening fills stop valve HCV-2, you can fill LNG to LNG storage tank-left side 1.Fill only
Returning valve CV-1 prevents LNG from backflowing out of to come from LNG storage tank-left side 1.Level gauging module includes LNG liquid level sensors-left side 4 (in Fig. 2
) and LNG liquid levels in the measurement LNG storage tank-left side 1 of liquid level display LL-1, LNG liquid level sensor-left sides 4 and by measurement LS-1
LNG liquid levels are transmitted to LNG controllers 45, while being shown on liquid level display LL-1.Feed flow module includes feed flow check-valves CV-
2nd, excess flow valve EFV-1, LNG magnetic valves-left side 3 (ultralow temperature electromagnetic valve SV-1 in Fig. 2), feed flow interface CN-4.Open LNG electromagnetism
After valve-left side 3, the LNG in LNG storage tank-left side 1 under pressure, by above-mentioned each part flow to the gasifier of feed system-
A left side 9.Feed flow check-valves CV-2 prevents LNG from flowing back to LNG storage tank-left side 1.Excess flow valve EFV-1 limits LNG flow rate.Vacuum explosion
Module includes vacuum stopper BD-1.Its main function is to be used as interface when being vacuumized to LNG storage tank-left side 1.In addition, just in case LNG is let out
Reveal vacuum layer, it can play a part of pressure release.LNG storage tank-right side 2 have with the identical configuration in LNG storage tank-left side 1,
This is no longer described.
As shown in figure 1, feed system includes gasifier-left side 9 and gasifier-right side 10, a natural gas temperature sensor one-left side 11
With natural gas temperature sensor one-right side 12, diffusion valve 13, natural gas flowmeter 14, electromagnetic valve for natural gas 15, hand off valve
16th, pressure regulator 17, cleaner 18, natural gas temperature sensor 2 19, natural pressure force snesor 20, intelligent metering valve 21, collection
Into air throttle-left side 22 and integrated air throttle-right side 23, blender-left side 24 and blender-right side 25, and diesel oil flowmeter 28.Gasification
Device-left 9 one end is connected with LNG storage tank-left side 1, and the other end is connected with diffusion valve 13.Gasifier-left 9 heating and gasifying from LNG storage tank-
A left side 1 is flowed into LNG therein.Gasifier-right 10 one end is connected with LNG storage tank-right side 2, and the other end is connected with diffusion valve 13, gasification
Device-right 10 heating and gasifying is flowed into LNG therein from LNG storage tank-right side 2.Diffusion valve 13, natural gas flowmeter 14, natural pneumoelectric
Magnet valve 15, hand off valve 16, pressure regulator 17, cleaner 18, intelligent metering valve 21 are sequentially connected.The connection collection of intelligent metering valve 21
Into air throttle-left side 22 and integrated air throttle-right side 23, integrated air throttle-left side 22 and integrated air throttle-right side 23 connect mixing respectively
Device-left side 24 and blender-right side 25, blender-left side 24 and blender-right side 25 are respectively connecting to corresponding booster.Wherein, natural gas
It is temperature sensor one-left side 11 and natural gas temperature sensor one-right side 12, natural gas flowmeter 14, electromagnetic valve for natural gas 15, natural
Gas temperature sensor 2 19, natural pressure force snesor 20, intelligent metering valve 21, integrated air throttle-left side 22 and integrated air throttle-
The right side 23, diesel oil flowmeter 28 are communicatively connected to LNG controllers 45, and electromagnetic valve for natural gas 15, intelligent metering valve 21, collection respectively
LNG controllers 45 into the controlled system in air throttle-left side 22 and integrated air throttle-right side 23 are controlled.
Feed system also includes gas pipeline 26.Respectively from the He of LNG storage tank-left side 1 in the flow direction of natural gas such as Fig. 1
Shown in the arrow trend that LNG storage tank-right side 2 is set out.Gas pipeline 26 includes：Respectively from LNG storage tank-left side 1 and LNG storage tank-right side 2
To the connecting line on gasifier-left side 9 and gasifier-right side 10, gasifier-left side 9 and gasifier-right side 10 are each to the company of diffusion valve 13
Take over road, diffusion valve 13 to natural gas flowmeter 14, natural gas flowmeter 14 to electromagnetic valve for natural gas 15, electromagnetic valve for natural gas 15
To hand off valve 16, hand off valve 16 to pressure regulator 17, pressure regulator 17 to cleaner 18, cleaner 18 to intelligent metering valve
21 connecting line, from intelligent metering valve 21 respectively to the connecting line on integrated air throttle-left side 22 and integrated air throttle-right side 23,
Integrated air throttle-left side 22 to blender-left side 24, the connecting line of the booster on blender-left side 24 to engine, and integrated section
Valve-right side 23 to blender-right side 25, the connecting line of the booster on blender-right side 25 to engine.Gas pipeline 26 will be stored up
The LNG of deposit system is delivered to engine in the form of natural gas.Wherein, natural gas temperature sensor 11,12,19 and natural pressure
Force snesor 20 is arranged on gasifier-left side 9 and gasifier-right side 10 to the connecting line of intelligent metering valve 21, respectively measurement pipe
The temperature and pressure of natural gas and the temperature and pressure of measurement is transmitted in road to LNG controllers 45 respectively.
Feed system also includes coolant pipeline.Walked in the flow direction of coolant such as Fig. 1 from the arrow of engine
To shown.Coolant pipeline is included from engine respectively to gasifier-left side 9 and the connecting line of the entrance on gasifier-right side 10, with
And from the outlet on gasifier-left side 9 and gasifier-right side 10 respectively to the connecting line of engine.Utilize the coolant point of engine
LNG in other heating gasifying device-left side 9 and gasifier-right side 10, is allowed to natural gas of the gasification for normal temperature.As shown in figure 1, coolant
By a pipeline after engine outflow, two pipelines gone out halfway by this line branching are respectively by gasifier-left side 9
Enter gasifier-left side 9 and gasifier-right side 10 with the entrance on gasifier-right side 10, then coolant is gentle from gasifier-left side 9 respectively
Change the outlet outflow on device-right side 10, flow through two return lines, two return lines merge into a pipeline in midway, cool down
Liquid flows back to engine finally by this pipeline.In another embodiment, coolant by two pipelines from engine outflow after
Gasifier-left side 9 and gasifier-right side 10 are respectively enterd, then coolant is respectively from the outlet on gasifier-left side 9 and gasifier-right side 10
Outflow, engine is flowed back to by two pipelines.Flow through each circulation loop of self-forming one of coolant of two gasifiers.
Feed system mainly adjusts the flow of natural gas, pressure and temperature.Wherein, intelligent metering valve 21 controls natural gas
Total flow and knock prevention.Integrated air throttle-left side 22 and integrated air throttle-right side 23 control to flow to the day of engine side respectively
Right throughput.There is perforate on blender-left side 24 and blender-right side 25 along girth and at center.If gas pressure surpasses
Limit value is crossed, diffusion valve 13 can be opened, empty the natural gas stayed in pipeline, to ensure safety.
Control system includes LNG controllers 45, sensor (air inlet pressure sensor-left side 29 and air inlet pressure sensor-right side
30th, boost-pressure sensor 31 and 32, intake manifold pressure sensor 33 and 34, MATS 35 and 36, cold
But liquid temperature sensor 37, crankshaft rotational speed sensor 38, camshaft speed sensor 39, exhaust gas temperature sensor 40, pinking are passed
Sensor 41), display 42, switch 43 and wire harness 44.Wire harness 44 herein refers to LNG controllers 45 and each sensor and mentioned immediately above
To the connecting line between the part that is mentioned below.Wherein, air inlet pressure sensor-left side 29 is arranged on blender-left side 24
Incoming air conduit road on and be connected by wire harness 44 with LNG controllers 45, air inlet pressure sensor-right side 30 be arranged on mixing
It is connected on the incoming air conduit road on device-right side 25 and by wire harness 44 with LNG controllers 45.Air inlet pressure sensor-left side 29 and enter
Air pressure force snesor-right side 30 measures the pressure of the air into blender-left side 24 and blender-right side 25 and respectively will measurement respectively
Pressure transmission to LNG controllers 45；Boost-pressure sensor 31 and 32, intake manifold pressure sensor 33 and 34, air inlet discrimination
Pipe temperature sensor 35 and 36, cooling-water temperature transmitter 37, crankshaft rotational speed sensor 38, camshaft speed sensor 39, row
Gas temperature sensor 40, detonation sensor 41 are installed on the engine, and are respectively passed the information of each measurement by wire harness 44
Transport to LNG controllers 45.Switch 43 controls the selection of diesel fuel mode or dual fuel mode.
Control system is the core and difficult point of the whole technology of the natural gas supply system of the present invention.Operator can utilize
Switch 43 manually selects diesel fuel mode or dual fuel mode, can also pass through automatically controlling switch 43 of LNG controllers 45
To select diesel fuel mode or dual fuel mode.Under dual fuel mode, the ECU that LNG controllers 45 are carried with engine
46 cooperatings, collection calculates parameters of natural gas and engine operating parameter.No matter vehicle is driven by power or Mechanical Driven,
ECU 46 can gather corresponding load value.LNG controllers 45 draw according to engine speed and load and preferably replaced
For rate.Under different operating modes (rotating speed and moment of torsion), LNG controllers 45 can automatically control LNG magnetic valves-left side 3 and LNG electromagnetism
Valve-right side 6, electromagnetic valve for natural gas 15, the switch on intelligent metering valve 21 and integrated air throttle-left side 22 and integrated air throttle-right side 23
And aperture, along with the pressure of default pressure regulator 17, LNG controllers 45 can stablize accurately control natural gas flow,
Pressure and temperature, so as to obtain preferable substitution rate.Regardless of the diesel engine state (new and old, performance difference etc.) being adapted,
The natural gas supply system of the present invention can obtain most rational substitution rate.Highest substitution rate can reach 70%.Substitute calibration
Justice be when engine under diesel oil and dual fuel mode with identical rotating speed and Power operation when, diesel consumption under dual fuel mode
Rate percentage of reduction compared with diesel consumption rate under diesel fuel mode.
LNG controllers 45 also monitor the input of all the sensors and instrument except obtaining preferable substitution rate as described above
And output, it is ensured that each parameter is all in allowed limits.It is in office why not it is normal in the case of, such as gas pressure it is too high or
Natural gas leakage, LNG controllers 45 can all close natural gas system immediately, engine is returned to pure diesel fuel mode.And double combustions
Switching between material pattern and pure diesel fuel mode is very smooth, and the rotating speed and power of engine are not almost fluctuated.In this situation
Under, operator can not make engine return to dual fuel mode with switch 43 by force before being powered off, and this is extra safety measure.
In emergency circumstances, diffusion valve 13 can be opened, and empty the natural gas stayed in pipeline, to ensure safety.
Display 42 is arranged on vehicle cab (not shown), in real time all crucial ginsengs of display natural gas supply system
Number.So driver can understand the operation conditions of vehicle at any time.Once breaking down, display 42 can automatic alarm.
In a preferred embodiment of the natural gas supply system of the present invention, natural gas supply system of the invention is successfully answered
V-arrangement high-power engine for 240 tons of mine cars.Mine car is V-arrangement with high-power engine majority.
First, circulated according to the actual load of mine car, appropriately designed diesel fuel tanks and LNG storage tank-left side 1 and LNG storage tank-right side
2, it is ensured that when changing shifts every time, while diesel oil and LNG are filled, to save the time and improve operating efficiency.Engine displacement is 76
Rise, rated speed is 1900rpm, and rated power is 1865kW.Dual fuel mode is run under intermediate speed and middle high load capacity.
Engine power performance and efficiency under dual fuel mode is identical with pure diesel fuel mode.The other parameters of engine, for example
Delivery temperature, cooling water temperature, oil temperature etc. are all in the range of engine manufacturer sets.
Secondly, main assembly work includes：The diesel fuel tanks of special relatively low capacity are installed, installed additional outside hydraulic oil container
LNG storage tank-left side 1 and gasifier-left side 9, install LNG storage tank-right side 2 and gasifier-right side 10 additional outside diesel fuel tanks.Pacify on the engine
Fill integrated air throttle-left side 22 and integrated air throttle-right side 23, blender-left side 24 and blender-right side 25, diesel oil flowmeter 28, air inlet
Pressure sensor-left side 29 and air inlet pressure sensor-right side 30, boost-pressure sensor 31 and 32, intake manifold pressure sensor
33 and 34, MATS 35 and 36, cooling-water temperature transmitter 37, crankshaft rotational speed sensor 38, camshaft turn
Fast sensor 39, exhaust gas temperature sensor 40, detonation sensor 41.Installed on vehicle frame (not shown) and in booster upstream
Natural gas temperature sensor 11 and 12 and 19, diffusion valve 13, natural gas flowmeter 14, electromagnetic valve for natural gas 15, hand off
Valve 16, pressure regulator 17, cleaner 18, natural pressure force snesor 20, intelligent metering valve 21.Driving indoor location LNG controls
Device 45, display 42, switch 43.In engine, vehicle frame, driver's cabin arrangement wire harness 44.The natural gas supply system pair of the present invention
The change of the parts of engine in itself is very small.The original all settings of engine, such as injection timing, valve timing, pressure
Contracting ratio etc., all keeps constant.
Under dual fuel mode, LNG magnetic valves-left side 3 and LNG magnetic valves-right side 6, electromagnetic valve for natural gas 15, hand off valve
After 16 are opened, LNG separately flows into the gasifier-left side 9 being connected from LNG storage tank-left side 1 and LNG storage tank-right side 2 under pressure
With gasifier-right side 10, and respectively in gasifier-left side 9 and gasifier-right side 10 heating and gasifying be natural gas.Natural gas flows successively
Through diffusion valve 13, natural gas flowmeter 14, electromagnetic valve for natural gas 15, hand off valve 16, pressure regulator 17, cleaner 18, intelligence
Metering valve 21, integrated air throttle-left side 22 and integrated air throttle-right side 23, blender-left side 24 and blender-right side 25, booster, enter
Gas manifold, finally enters cylinder (not shown).The total flow and knock prevention of the control natural gas of intelligent metering valve 21.
Integrated air throttle-left side 22 and integrated air throttle-right side 23 control to flow to the gas discharge of engine side, such engine respectively
Both sides can balance.There is perforate on blender-left side 24 and blender-right side 25 along girth and at center.Moreover, booster
The blade rotational speed of compressor is very high.These all enable natural gas and air to mix well.
Under dual fuel mode, the cooperating of ECU 46 that LNG controllers 45 are carried with engine, collection calculates day
Right gas parameter and engine operating parameter.Under different operating modes (rotating speed and moment of torsion), LNG controllers 45 can automatically control LNG
Magnetic valve-left side 3 and LNG magnetic valves-right side 6, electromagnetic valve for natural gas 15, intelligent metering valve 21 and integrated air throttle-left side 22 and collection
Into the switch and aperture on air throttle-right side 23, along with the pressure of default pressure regulator 17, LNG controllers 45 can be stablized accurate
Ground controls flow, the pressure and temperature of natural gas, so as to obtain preferable substitution rate.LNG controllers 45 also monitor all simultaneously
The input and output of sensor and instrument, it is ensured that each parameter is all in allowed limits.It is in office why not it is normal in the case of, for example
Gas pressure is too high or natural gas leaking, and LNG controllers 45 can all close natural gas system immediately, return to engine pure
Diesel fuel mode.Switching between dual fuel mode and pure diesel fuel mode is very smooth, and the rotating speed and power of engine almost do not have
Fluctuation.In the case, operator can not make engine return to dual fuel mode with switch 43 by force before being powered off, and this is extra
Safety measure.In case of emergency, diffusion valve 13 can be opened, and empty the natural gas stayed in pipeline, to ensure safety.
The dedicated display 42 of indoor location is driven, in real time all key parameters of display natural gas system.Driver can be with
The operation conditions of mine car is understood at any time.Once breaking down, display 42 can automatic alarm.
The maximum substitution rate that the natural gas supply system of the present invention is applied on mine car high-power engine is 70%.It is whole
The average substitution rate of individual duty cycle is 30-40%, it means that double if former diesel oil of diesel engine consumption is double centner/hour
The diesel consumption of engine fuel is 60-70 kgs/hr.The cost of the diesel oil of saving subtracts the cost of the natural gas used, i.e.,
For the fuel cost of saving.The fuel cost of dual fuel engine can reduce 20%-30% than former Diesel engine.
The natural gas supply system of the high-power LNG- Diesel Dual-Fuel Engines of the present invention, realizes modularization, to original
The change of equipment (including engine) is very small.
In the present invention for the sake of clarity, the left and right expression way used is to be briefly described between adjacent component
Relative annexation, such as LNG storage tank-left side 1, gasifier-left side 9 is to show that gasifier-left side 9 is connected with LNG storage tank-left side 1；
And integrated air throttle-left side 22, blender-left side 24 be in order to show that integrated air throttle-left side 22 is connected with blender-left side 24, and
On a pipeline in two pipelines of branch after intelligent metering valve 21, connect corresponding with gasifier-left side 9 is not offered as
Connect.In addition, disclosed connected mode is the preferred embodiment of the present invention, the present invention is not limited to disclosed connected mode.
Embodiment described above only expresses embodiments of the present invention, and it describes more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.
Claims (10)
1. a kind of natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines, it is characterised in that including stocking system,
Feed system and control system, wherein, the stocking system is connected with the feed system, the feed system simultaneously with it is described
Stocking system and engine connection, the control system respectively with the stocking system, the feed system and the hair
Motivation is communicated to connect；
Wherein, the control system include LNG controllers, and be connected respectively with the LNG controllers sensor, show
Device, switch；The stocking system include LNG storage tank, and be connected respectively with the LNG storage tank LNG magnetic valves, LNG liquid levels
Sensor, LNG pressure sensor, the LNG magnetic valves, LNG liquid level sensors and LNG pressure sensor are communicatively connected to respectively
The LNG controllers；The feed system include be linked in sequence successively gasifier, natural gas temperature sensor one, diffusion valve,
Natural gas flowmeter, electromagnetic valve for natural gas, hand off valve, pressure regulator, cleaner, natural gas temperature sensor two, natural gas
Pressure sensor, intelligent metering valve, integrated air throttle, blender and diesel oil flowmeter, wherein the natural gas temperature is sensed
Device one, natural gas flowmeter, electromagnetic valve for natural gas, natural gas temperature sensor two, natural pressure force snesor, intelligent metering
Valve, integrated air throttle and diesel oil flowmeter are communicatively connected to the LNG controllers respectively.
2. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 1, its feature exists
In the switch control diesel fuel mode of the control system or the selection of dual fuel mode.
3. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 2, its feature exists
In, under the dual fuel mode, the ECU cooperating that the LNG controllers are carried with the engine, collection meter
Calculate parameters of natural gas and engine operating parameter.
4. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 3, its feature exists
In the LNG controllers automatically control the LNG magnetic valves, electromagnetic valve for natural gas, intelligent metering valve and integrated air throttle
Switch and aperture.
5. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 1, its feature exists
In the sensor of the control system includes air inlet pressure sensor, boost-pressure sensor, air- distributor pressure sensing
Device, MATS, cooling-water temperature transmitter, crankshaft rotational speed sensor, camshaft speed sensor, exhaust temperature
Spend sensor, detonation sensor.
6. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 5, its feature exists
In the air inlet pressure sensor, boost-pressure sensor, intake manifold pressure sensor, MATS are equal
For two.
7. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 1, its feature exists
In the gasifier, natural gas temperature sensor one, integrated air throttle, the blender of the feed system are two.
8. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 1, its feature exists
In the LNG storage tank of the stocking system, LNG magnetic valves, LNG liquid level sensors, LNG pressure sensor are two.
9. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 1, its feature exists
In the LNG storage tank is equipped with and is provided with pressure adjusting module, fills module, level gauging module, feed flow module and vacuum explosion
Module.
10. the natural gas supply system of high-power LNG- Diesel Dual-Fuel Engines according to claim 1, its feature exists
In the feed system also includes gas pipeline and coolant pipeline.
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| CN201611104343.8A CN107061052B (en) | 2016-12-05 | 2016-12-05 | LNG supply system |
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| CN201611104343.8A CN107061052B (en) | 2016-12-05 | 2016-12-05 | LNG supply system |
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| CN107061052B (en) | 2019-07-05 |
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