WO2018102959A1 - Lng供应系统 - Google Patents

Lng供应系统 Download PDF

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Publication number
WO2018102959A1
WO2018102959A1 PCT/CN2016/108550 CN2016108550W WO2018102959A1 WO 2018102959 A1 WO2018102959 A1 WO 2018102959A1 CN 2016108550 W CN2016108550 W CN 2016108550W WO 2018102959 A1 WO2018102959 A1 WO 2018102959A1
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WIPO (PCT)
Prior art keywords
lng
natural gas
supply system
diesel
sensor
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PCT/CN2016/108550
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English (en)
French (fr)
Inventor
黄亮宇
孙家峰
周建武
肖峻涛
蔡海洋
邓浩章
Original Assignee
江苏弗莱因工程技术有限公司
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Priority to PCT/CN2016/108550 priority Critical patent/WO2018102959A1/zh
Publication of WO2018102959A1 publication Critical patent/WO2018102959A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents

Definitions

  • the invention relates to the field of engines, and in particular to a natural gas supply system for a high-power LNG-diesel dual-fuel engine.
  • the high-power engines used in mining trucks, train locomotives or ships are diesel engines. Not only the operating cost is high, but also the exhaust pollutants contain a large amount of nitrogen oxides, particles, sulfides, etc., which are difficult to control and cause environmental pollution.
  • Tier4i transition
  • Tier4 final
  • China's railway transportation is one of the major domestic diesel consumers.
  • Increasingly strict energy conservation and environmental protection requirements the requirements for diesel locomotives and their diesel engines are constantly increasing, and the task of finding alternative energy sources has become more and more urgent.
  • Natural gas is the best alternative to traditional engine fuels (diesel, gasoline). Natural gas has good energy-saving and environmental protection effects, good anti-explosion, complete combustion, and no carbonation. Rich in natural gas resources, it is the fastest growing energy source in the world. Natural gas is economical and its cost is lower than that of conventional engine fuel. Natural gas is safe, because of its low density, it will quickly disappear in the air once it leaks. Natural gas is compressed and cooled into LNG (liquefied natural gas), which can greatly increase energy Density, easy to transport.
  • LNG liquefied natural gas
  • an object of the present invention is to provide a natural gas supply system for a high-power LNG-diesel dual-fuel engine, which can ensure the original performance of the engine and enable high-power LNG-diesel dual fuel.
  • the engine has been successfully used in mines, railways, ships and other fields.
  • a natural gas supply system for a high-power LNG-diesel dual-fuel engine comprising a storage system, a supply system and a control system, wherein the storage system is connected to the supply system, the supply system is simultaneously connected to the storage system and the engine, and the control system and the storage system are respectively , supply system and engine communication connection;
  • the control system includes an LNG controller, and sensors, displays, and switches respectively connected to the LNG controller;
  • the storage system includes an LNG storage tank, and an LNG solenoid valve, an LNG liquid level sensor, and an LNG pressure sensor respectively connected to the LNG storage tank.
  • the LNG solenoid valve, the LNG liquid level sensor and the LNG pressure sensor are respectively communicably connected to the LNG controller;
  • the supply system comprises a gasifier sequentially connected in sequence, a natural gas temperature sensor, a discharge valve, a natural gas flow meter, a natural gas solenoid valve, and a manual cutoff Valves, pressure regulators, filters, natural gas temperature sensors 2, natural gas pressure sensors, smart metering valves, integrated throttles, mixers and diesel flow meters, including natural gas temperature sensors, natural gas flow meters, natural gas solenoid valves, natural gas temperatures Sensor 2, natural gas pressure sensor, smart metering valve, integrated throttle and diesel flow The meters are communicatively connected to the LNG controller.
  • the switch of the control system controls the selection of the diesel mode or the dual fuel mode.
  • the LNG controller works in conjunction with the engine's own electronic control unit to collect and calculate natural gas parameters and engine operating parameters.
  • the LNG controller automatically controls the switching and opening of the LNG solenoid valve, the natural gas solenoid valve, the smart metering valve, and the integrated throttle.
  • the sensors of the control system include an intake pressure sensor, a boost pressure sensor, an intake manifold pressure sensor, an intake manifold temperature sensor, a coolant temperature sensor, a crankshaft speed sensor, a camshaft speed sensor, and an exhaust temperature sensor. , knock sensor.
  • the intake pressure sensor, the boost pressure sensor, the intake manifold pressure sensor, and the intake manifold temperature sensor are both.
  • the gasifier of the supply system the natural gas temperature sensor 1, the integrated throttle, and the mixer are both.
  • the storage system has two LNG storage tanks, an LNG electromagnetic valve, an LNG liquid level sensor, and an LNG pressure sensor.
  • the LNG storage tank is equipped with a pressure regulating module, a filling module, a liquid level measuring module, a liquid supply module and a vacuum blasting module.
  • the supply system further includes a natural gas pipeline and a coolant pipeline.
  • the natural gas supply system of the high-power LNG-diesel dual-fuel engine of the present invention is installed on a large-scale equipment such as a mining truck or a train locomotive, and the modification is simple and the initial investment is low.
  • the natural gas supply system of the present invention has significant economic benefits. Natural gas prices in China are much lower than diesel. When natural gas supply systems are widely used in large-scale diesel engine-related equipment such as high-power mining equipment, railway locomotives (diesel vehicles), ships, and petroleum system equipment, they can save a lot of fuel costs for enterprises. According to the survey, the annual coal consumption of China Coal Group's largest open-pit coal mine in Ping'an Antaibao open pit mine in China reached 1.5 billion yuan. If the natural gas supply system of the present invention is used, the profit rate is assumed based on the current price of LNG and diesel. 20%, then you can save 300 million yuan in diesel costs every year.
  • the natural gas supply system of the present invention has significant social benefits. Since natural gas combustion produces almost no particulate matter, exhaust pollution of an engine using a natural gas supply system can be greatly reduced. At the same time, carbon emissions are also reduced. According to the information provided by BP China Carbon Emissions Calculator, each LNG-diesel dual-fuel vehicle can reduce CO 2 emissions by about 60 tons per year compared to pure gasoline and diesel vehicles. If calculated according to the 8-year service period, each vehicle can reduce CO. 2 emissions of about 480 tons.
  • FIG. 1 is a schematic view of a natural gas supply system of a high power LNG-diesel dual fuel engine of the present invention
  • FIG. 2 is a schematic diagram of an LNG storage tank of a natural gas supply system of a high power LNG-diesel dual fuel engine of the present invention.
  • the natural gas supply system (hereinafter referred to as a natural gas supply system) of the high-power LNG-diesel dual-fuel engine provided by the present invention includes a storage system, a supply system, and a control system.
  • the storage system is connected to the supply system, and the supply system is simultaneously connected to the storage system and the engine, and the control system is communicably connected to the storage system, the supply system, and the engine, respectively.
  • the control system includes an LNG controller, and sensors, displays, and switches respectively connected to the LNG controller;
  • the storage system includes an LNG storage tank, and an LNG solenoid valve, an LNG liquid level sensor, and an LNG pressure sensor respectively connected to the LNG storage tank.
  • the LNG solenoid valve, the LNG liquid level sensor and the LNG pressure sensor are respectively communicably connected to the LNG controller;
  • the supply system comprises a gasifier sequentially connected in sequence, a natural gas temperature sensor, a discharge valve, a natural gas flow meter, a natural gas solenoid valve, and a manual cutoff Valves, regulators, filters, natural gas temperature sensors, natural gas pressure sensors, smart metering valves, integrated throttles, mixers, and diesel flow meters.
  • natural gas temperature sensor 1 natural gas flow meter, natural gas solenoid valve, natural gas temperature sensor 2, natural gas pressure sensor, smart metering valve, integrated throttle and diesel flow meter are respectively connected to LNG Controller.
  • the storage system includes LNG storage tanks - left 1 and LNG storage tanks - right 2, LNG solenoid valves - left 3 and LNG solenoid valves - right 6, LNG level sensors - left 4 and LNG level sensors - Right 7, LNG pressure sensor - left 5 and LNG pressure sensor - right 8.
  • LNG storage tank - left 1 and LNG solenoid valve - left 3, LNG liquid level sensor - left 4, LNG pressure sensor - left 5, and LNG solenoid valve - left 3, LNG liquid level sensor - left 4, LNG Pressure sensor - left 5 is separately connected to the LNG controller 45 of the control system;
  • LNG storage tank - right 2 is connected with LNG solenoid valve - right 6, LNG liquid level sensor - right 7, LNG pressure sensor - right 8 respectively, and LNG Solenoid valve - right 6, LNG level sensor - right 7, LNG pressure sensor - right 8 are respectively communicatively connected to the LNG controller 45 of the control system.
  • the LNG solenoid valve - the left 3 and the LNG solenoid valve - the right 6 are respectively controlled by the LNG controller 45 of the control system.
  • LNG storage tank - left 1 and LNG storage tank - right 2 stores high pressure and low temperature LNG as fuel
  • LNG storage tank - left 1 and LNG storage tank - right 2 are respectively provided with protective tanks (not shown) .
  • the LNG storage tank - left 1 and LNG storage tank - right 2 have the same configuration. Referring to Fig. 2, only the LNG storage tank-left 1 will be described as an example.
  • the LNG storage tank - the left 1 is equipped with a pressure regulating module, a filling module, a liquid level measuring module, a liquid supply module and a vacuum blasting module.
  • the pressure regulation module includes LNG pressure sensor - left 5, economic valve PCV-1, main safety valve PSV-1, secondary safety valve PSV-2, pipeline safety valve TSV-1, return air interface CN-1, release interface CN-2, return air shutoff valve HCV-1, pressure gauge PG-1, pressure gauge PG-2.
  • the LNG pressure sensor - left 5 measures the pressure in the LNG tank - left 1 and transmits the measured pressure to the LNG controller 45; the use of the economic valve PCV-1 saves LNG; the three safety valves exceed the limit in the line pressure When the value is vented through the return air shutoff valve HCV-1, the return air interface CN-1, and the release interface CN-2, the system safety is ensured; the two pressure gauges display the pipeline pressure.
  • the filling module includes a filling interface CN-3, a filling shut-off valve HCV-2, and a filling check valve CV-1. The operator connects the LNG filling gun to the filling interface CN-3, opens the filling shut-off valve HCV-2, and can fill the LNG storage tank-left 1 with LNG.
  • the filling check valve CV-1 prevents the LNG from flowing back from the LNG storage tank - left 1 .
  • the liquid level measurement module includes LNG level sensor - left 4 (LS-1 in Figure 2) and liquid level display LL-1, LNG level sensor - left 4 measuring LNG tank - LNG level in left 1 and will measure Transfer of LNG liquid level to LNG control
  • the controller 45 is simultaneously displayed on the liquid level display LL-1.
  • the liquid supply module includes a liquid supply check valve CV-2, an over-flow valve EFV-1, an LNG solenoid valve-left 3 (the ultra-low temperature solenoid valve SV-1 in FIG. 2), and a liquid supply interface CN-4.
  • the vacuum blasting module includes a vacuum plug BD-1. Its main function is to serve as an interface when vacuuming the LNG storage tank - left 1 . In addition, in the event that the LNG leaks into the vacuum layer, it can act as a pressure relief.
  • the LNG storage tank - Right 2 has exactly the same configuration as the LNG storage tank - Left 1, and will not be described here.
  • the supply system includes a gasifier - left 9 and gasifier - right 10, natural gas temperature sensor - left 11 and natural gas temperature sensor - right 12, relief valve 13, natural gas flow meter 14, natural gas solenoid valve 15. Manual shut-off valve 16, pressure regulator 17, filter 18, natural gas temperature sensor II 19, natural gas pressure sensor 20, smart metering valve 21, integrated throttle - left 22 and integrated throttle - right 23, mixer - Left 24 and mixer - right 25, and diesel flow meter 28.
  • the gasifier - the left 9 end is connected to the LNG storage tank - the left 1 and the other end is connected to the discharge valve 13.
  • the gasifier - left 9 heated gasification LNG from the LNG storage tank - left 1 into it.
  • the gasifier - the right end 10 is connected to the LNG storage tank - the right 2, the other end is connected to the discharge valve 13, and the gasifier - the right 10 is heated to vaporize the LNG flowing into the LNG storage tank - the right 2 into it.
  • the relief valve 13, the natural gas flow meter 14, the natural gas solenoid valve 15, the manual shut-off valve 16, the pressure regulator 17, the filter 18, and the smart metering valve 21 are sequentially connected.
  • Smart metering valve 21 connected to integrated throttle - left 22 and integrated throttle - right 23, integrated throttle - left 22 and integrated throttle - right 23 connected to mixer - left 24 and mixer - right 25, mixer - left 24 and mixer - right 25 are connected to the respective supercharger.
  • natural gas temperature sensor one-left 11 and natural gas temperature sensor one-right 12, natural gas flow meter 14, natural gas solenoid valve 15, natural gas temperature sensor two 19, natural gas pressure sensor 20, smart metering valve 21, integrated throttle - left 22 And the integrated throttle-right 23, the diesel flow meter 28 is communicatively coupled to the LNG controller 45, respectively, and the natural gas solenoid valve 15, the smart metering valve 21, the integrated throttle-left 22, and the integrated throttle-right 23 controlled system LNG The controller 45 controls.
  • the supply system also includes a natural gas line 26.
  • the flow direction of the natural gas is shown in the arrow direction from the LNG storage tank - the left 1 and the LNG storage tank - right 2, respectively.
  • Natural gas line 26 includes: from LNG storage tank - left 1 and LNG storage tank - right 2 to gasifier - left 9 and gasifier - right 10 connecting line, gasifier-left 9 and gasifier-right 10 each to the connection line of the relief valve 13, the relief valve 13 to the natural gas flow meter 14, the natural gas flow meter 14 to the natural gas solenoid valve 15, the natural gas solenoid valve 15 to the manual shut-off valve 16, the manual shut-off valve 16 to the pressure regulator 17, the pressure regulator 17 to the filter 18, the filter 18 to the connection line of the smart metering valve 21, from the smart metering valve 21 to the integration section Valve - left 22 and integrated throttle - right 23 connection line, integrated throttle - left 22 to mixer - left 24, mixer - left 24 to the engine's supercharger connection line, and integrated throttle - Right 23 to
  • the natural gas line 26 delivers the LNG of the storage system to the engine in the form of natural gas.
  • the natural gas temperature sensors 11, 12, 19 and the natural gas pressure sensor 20 are disposed on the connecting lines of the gasifier-left 9 and the gasifier-right 10 to the smart metering valve 21, respectively measuring the temperature and pressure of the natural gas in the pipeline and The measured temperature and pressure are transmitted to the LNG controller 45, respectively.
  • the supply system also includes a coolant line.
  • the flow direction of the coolant is shown by the arrow from the engine in Figure 1.
  • the coolant line includes a connecting line from the engine to the inlet of the gasifier-left 9 and the gasifier-right 10, and a connecting pipe from the gasifier-left 9 and the gasifier-right 10 outlet to the engine respectively. road.
  • the LNG in the gasifier-left 9 and the gasifier-right 10 is separately heated by the coolant of the engine to be gasified to natural gas at normal temperature.
  • the two pipelines branched through the pipeline in the middle pass through the inlets of the gasifier-left 9 and the gasifier-right 10 respectively into the gasifier.
  • the coolant flows out from the outlets of the gasifier - left 9 and gasifier - right 10, respectively, through two return lines, which merge into one in the middle The pipeline, through which the coolant finally flows back to the engine.
  • the coolant flows out of the engine through two lines and enters the gasifier - left 9 and gasifier - right 10, respectively, and then the coolant is separately from the gasifier - left 9 and gasifier - right 10
  • the outlet flows out and flows back to the engine through two lines.
  • the coolant flowing through the two gasifiers each form a circulation loop.
  • the supply system primarily regulates the flow, pressure and temperature of the natural gas.
  • the smart metering valve 21 controls the total flow of natural gas and prevents knocking.
  • the integrated throttle - left 22 and integrated throttle - right 23 control the flow of natural gas to the side of the engine, respectively.
  • the mixer - left 24 and mixer - right 25 have openings along the circumference and at the center. If the natural gas pressure exceeds the limit, the bleed valve 13 will open and evacuate the natural gas remaining in the line for safety.
  • the control system includes an LNG controller 45, sensors (intake pressure sensor - left 29 and intake pressure sensor - right 30, boost pressure sensors 31 and 32, intake manifold pressure sensors 33 and 34, intake manifold temperature sensor) 35 and 36, coolant temperature sensor 37, crankshaft speed sensor 38, camshaft speed sensor 39, exhaust temperature sensor 40, knock sensor 41), display 42, switch 43, and harness 44.
  • Wire harness 44 herein refers to the connection between the LNG controller 45 and the various sensors and the components mentioned above and those mentioned below.
  • the intake pressure sensor - left 29 is mounted on the intake air line of the mixer - left 24 and is connected to the LNG controller 45 via a harness 44
  • the intake pressure sensor - right 30 is mounted in the mixer - right 25 inlet air tube
  • the road is connected to the LNG controller 45 via a wire harness 44.
  • the intake pressure sensor - left 29 and intake pressure sensor - right 30 respectively measure the pressure of the air entering the mixer - left 24 and mixer - right 25 and respectively transmit the measured pressure to the LNG controller 45; the boost pressure sensor 31 and 32, intake manifold pressure sensors 33 and 34, intake manifold temperature sensors 35 and 36, coolant temperature sensor 37, crankshaft speed sensor 38, camshaft speed sensor 39, exhaust temperature sensor 40, knock sensor
  • the 41 is mounted on the engine and transmits the respective measured information to the LNG controller 45 via the harness 44, respectively.
  • Switch 43 controls the selection of the diesel mode or dual fuel mode.
  • the control system is the core and difficulty of the entire technology of the natural gas supply system of the present invention.
  • the operator can use the switch 43 to manually select the diesel mode or the dual fuel mode, or the switch 43 can be automatically controlled by the LNG controller 45 to select the diesel mode or the dual fuel mode.
  • the LNG controller 45 works in conjunction with the electronic control unit 46 that is provided with the engine to collect and calculate natural gas parameters and engine operating parameters. Whether the vehicle is electrically driven or mechanically driven, the electronic control unit 46 can collect corresponding load values.
  • the LNG controller 45 derives an ideal replacement rate based on engine speed and load.
  • LNG controller 45 can automatically control LNG solenoid valves - left 3 and LNG solenoid valves - right 6, natural gas solenoid valve 15, smart metering valve 21 and integrated throttle - left 22 and integrated
  • the throttle and the opening of the right 23, together with the preset pressure of the pressure regulator 17, enable the LNG controller 45 to stably and accurately control the flow, pressure and temperature of the natural gas, thereby achieving an ideal replacement rate.
  • the natural gas supply system of the present invention can obtain the most reasonable replacement rate.
  • the highest replacement rate can reach 70%. Replacement rate is defined as when the engine The percentage of diesel consumption in dual fuel mode compared to diesel consumption in diesel mode when operating at the same speed and power in diesel and dual fuel modes.
  • the LNG controller 45 also monitors the inputs and outputs of all sensors and meters to ensure that the parameters are within the allowable range.
  • any abnormal situation such as high natural gas pressure or natural gas leakage
  • the LNG controller 45 will immediately shut down the natural gas system and return the engine to pure diesel mode.
  • the switching between the dual fuel mode and the pure diesel mode is very smooth, and the engine speed and power are almost no fluctuation.
  • the operator cannot force the switch 43 to return to the dual fuel mode before shutting down, which is an additional safety measure.
  • the relief valve 13 will open and evacuate the natural gas remaining in the pipeline for safety.
  • the display 42 is mounted in the vehicle cab (not shown) and displays all of the key parameters of the natural gas supply system in real time. This way the driver can keep track of the health of the vehicle. In the event of a fault, display 42 will automatically alert.
  • the natural gas supply system of the present invention is successfully applied to a V-shaped high power engine of a 240 ton mine car. Most of the high-power engines used in mine cars are V-shaped.
  • the engine has a displacement of 76 liters, a rated speed of 1900 rpm and a rated power of 1865 kW.
  • the dual fuel mode is operated at intermediate and medium to high loads. Engine power performance and efficiency in dual fuel mode are the same as in pure diesel mode. Other parameters of the engine, such as exhaust temperature, cooling water temperature, oil temperature, etc., are within the range set by the engine manufacturer.
  • the main assembly work includes: installing a special small-capacity diesel tank, installing LNG storage tank outside the hydraulic tank - left 1 and gasifier - left 9, adding LNG storage tank outside the diesel tank - right 2 and gasification - right 10.
  • Natural gas temperature sensors 11 and 12 and 19, a bleed valve 13, a natural gas flow meter 14, a natural gas solenoid valve 15, a manual shut-off valve 16, a pressure regulator 17, and a filter are mounted on a frame (not shown) and upstream of the supercharger.
  • the LNG controller 45, the display 42, and the switch 43 are mounted in the cab.
  • a wire harness 44 is disposed in the engine, the frame, and the cab.
  • the natural gas supply system of the present invention has very little modification to the components of the engine itself. All the original settings of the engine, such as injection timing, valve timing, compression ratio, etc., remain unchanged.
  • LNG solenoid valve - left 3 and LNG solenoid valve - right 6 natural gas solenoid valve 15, manual shut-off valve 16 is opened, LNG under pressure from LNG storage tank - left 1 and LNG storage tank -
  • the right 2 flows into the connected gasifier - left 9 and gasifier - right 10, respectively, and is heated to gas in the gasifier - left 9 and gasifier - right 10 respectively.
  • Natural gas flows through the release valve 13, natural gas flowmeter 14, natural gas solenoid valve 15, manual shut-off valve 16, pressure regulator 17, filter 18, smart metering valve 21, integrated throttle - left 22 and integrated throttle - right 23.
  • Mixer - left 24 and mixer - right 25 supercharger, intake manifold, and finally into the engine cylinder (not shown).
  • the smart metering valve 21 controls the total flow of natural gas and prevents knocking.
  • the integrated throttle - left 22 and integrated throttle - right 23 control the flow of natural gas to the side of the engine, respectively, so that the sides of the engine can be balanced.
  • the mixer - left 24 and mixer - right 25 have openings along the circumference and at the center. Moreover, the blade speed of the supercharger compressor is very high. These make natural gas and air mix well.
  • the LNG controller 45 works in conjunction with the electronic control unit 46 that is provided with the engine to collect and calculate natural gas parameters and engine operating parameters. Under different operating conditions (speed and torque), LNG controller 45 can automatically control LNG solenoid valves - left 3 and LNG solenoid valves - right 6, natural gas solenoid valve 15, smart metering valve 21 and integrated throttle - left 22 and integrated The throttle and the opening of the right 23, together with the preset pressure of the pressure regulator 17, enable the LNG controller 45 to stably and accurately control the flow, pressure and temperature of the natural gas, thereby achieving an ideal replacement rate. At the same time, the LNG controller 45 also monitors the inputs and outputs of all sensors and meters to ensure that the parameters are within the allowable range.
  • the LNG controller 45 In any abnormal situation, such as natural gas pressure is too high or natural In the event of a gas leak, the LNG controller 45 immediately shuts down the natural gas system and returns the engine to pure diesel mode.
  • the switching between the dual fuel mode and the pure diesel mode is very smooth, and the engine speed and power are almost no fluctuations. In this case, the operator cannot force the switch 43 to return to the dual fuel mode before shutting down, which is an additional safety measure.
  • the relief valve 13 will open and evacuate the natural gas remaining in the pipeline for safety.
  • a dedicated display 42 installed in the cab displays all key parameters of the natural gas system in real time. The driver can keep track of the operation of the mine car. In the event of a fault, display 42 will automatically alert.
  • the maximum replacement rate of the natural gas supply system of the present invention applied to a high power engine for a mine car is 70%.
  • the average replacement rate for the entire duty cycle is 30-40%, which means that if the diesel fuel consumption of the original diesel engine is 100 kg/hr, the diesel fuel consumption of the dual fuel engine is 60-70 kg/hr.
  • the cost of the saved diesel minus the cost of the natural gas used is the fuel cost saved.
  • the fuel cost of a dual fuel engine can be reduced by 20%-30% compared to the original diesel engine.
  • the natural gas supply system of the high-power LNG-diesel dual-fuel engine of the present invention is modularized, and the modifications to the original equipment (including the engine) are very small.
  • the left and right expressions used are for the purpose of simply describing the relative connection between adjacent components, such as LNG storage tank - left 1, gasifier - left 9 to indicate the gasifier -
  • the left 9 is connected to the LNG tank - left 1; the integrated throttle - left 22, mixer - left 24 is to indicate the integrated throttle - left 22 and mixer - left 24 connections, and branches after the smart metering valve 21
  • One of the two lines does not indicate a connection to the gasifier-left 9.
  • the disclosed connection is a preferred embodiment of the invention, and the invention is not limited to the disclosed connection.

Abstract

一种大功率LNG-柴油双燃料发动机的天然气供应系统，包括储存系统、供给系统和控制系统，其中储存系统与供给系统连接，供给系统同时与储存系统以及发动机连接，控制系统分别与储存系统、供给系统以及发动机通信连接。该天然气供应系统具有显著的经济效益和社会效益，不仅能为企业节约大量的燃油成本，而且可以大大降低发动机的排气污染。

Description

LNG供应系统 技术领域
本发明涉及发动机领域，尤其涉及一种大功率LNG-柴油双燃料发动机的天然气供应系统。
背景技术
目前矿用卡车、火车机车或船舶使用的大功率发动机为柴油机。不仅运营成本较高，而且排气污染物含有大量的氮氧化物、颗粒、硫化物等，难于治理，造成环境污染。
分别在2011年和2014-2015年生效的美国环保局Tier4i(过渡)和Tier4(最终)规定了更严格的排放标准，对矿用大型发动机没有免除要求。发动机公司必须研究新的技术，在不影响整机厂商和最终用户的设备、操作与生产成本的前提下，使发动机的排放能满足更严格的法规要求。
我国铁路运输是国内柴油消耗大户之一。越来越严格的节能环保要求，对内燃机车及其柴油机的要求不断提高，寻找替代能源的任务变得越来越迫切。
船舶对环境的污染逐渐得到关注，各方对船舶环保要求不断提升，我国也出台了船舶排放控制区实施方案，旨在减少船舶排放对大气造成的污染。
目前，天然气是替代传统发动机燃料(柴油、汽油)的最佳选择。天然气有良好的节能环保效果，抗爆性好，燃烧完全，不结碳。天然气资源丰富，是世界上产量增长最快的能源。天然气经济性好，其成本低于传统发动机燃料。天然气安全性好，由于密度小，一旦发生泄露，会很快在空气中消失。天然气经压缩冷却成为LNG(液化天然气)，可大大提高能量 密度，便于运输。
通过文献检索，发现目前与大功率LNG-柴油双燃料发动机天然气供应系统有关的专利，大部分是船用的，或涉及天然气供应系统的一部分，或涉及功率较小的发动机。国内LNG-柴油双燃料发动机天然气供应系统在小功率设备上已有应用及相关的报道，但大功率系统依然处于初创阶段，在矿山、铁路等领域的应用还是空白。并且现有专利还没有给大功率LNG-柴油双燃料发动机提供一套完善的天然气供应系统，也没有对发动机运行过程实现全程多方位监控，因而不利于发动机安全稳定地工作。
发明内容
针对上述现有技术中存在的问题，本发明的目的在于提供一种大功率LNG-柴油双燃料发动机的天然气供应系统，该系统能保证发动机的原有性能，并使大功率LNG-柴油双燃料发动机成功应用于矿山、铁路、船舶等领域。
为了实现上述发明目的，本发明采用的技术方案如下：
一种大功率LNG-柴油双燃料发动机的天然气供应系统，包括储存系统、供给系统和控制系统，其中，储存系统与供给系统连接，供给系统同时与储存系统以及发动机连接，控制系统分别与储存系统、供给系统以及发动机通信连接；
其中，控制系统包括LNG控制器，以及分别与LNG控制器连接的传感器、显示器、开关；储存系统包括LNG储罐，以及分别与LNG储罐连接的LNG电磁阀、LNG液位传感器、LNG压力传感器，LNG电磁阀、LNG液位传感器和LNG压力传感器分别通信连接至LNG控制器；供给系统包括依次顺序连接的气化器、天然气温度传感器一、放散阀、天然气流量计、天然气电磁阀、手动切断阀、调压器、滤清器、天然气温度传感器二、天然气压力传感器、智能计量阀、集成节气门、混合器以及柴油流量计，其中天然气温度传感器一、天然气流量计、天然气电磁阀、天然气温度传感器二、天然气压力传感器、智能计量阀、集成节气门以及柴油流 量计分别通信连接至LNG控制器。
进一步地，控制系统的开关控制柴油模式或者双燃料模式的选择。
进一步地，在双燃料模式下，LNG控制器与发动机自带的电控单元配合工作，采集计算天然气参数和发动机运行参数。
进一步地，LNG控制器自动控制LNG电磁阀、天然气电磁阀、智能计量阀以及集成节气门的开关和开度。
进一步地，控制系统的传感器包括进气压力传感器、增压压力传感器、进气歧管压力传感器、进气歧管温度传感器、冷却液温度传感器、曲轴转速传感器、凸轮轴转速传感器、排气温度传感器、爆震传感器。
进一步地，进气压力传感器、增压压力传感器、进气歧管压力传感器、进气歧管温度传感器均为两个。
进一步地，供给系统的气化器、天然气温度传感器一、集成节气门、混合器均为两个。
进一步地，储存系统的LNG储罐、LNG电磁阀、LNG液位传感器、LNG压力传感器均为两个。
进一步地，LNG储罐配备安装有压力调节模块、充装模块、液位测量模块、供液模块和真空爆破模块。
进一步地，供给系统还包括天然气管路和冷却液管路。
在矿用卡车或者火车机车等大型设备上加装本发明的大功率LNG-柴油双燃料发动机的天然气供应系统，改装简单，初始投入低。
本发明的天然气供应系统具有显著的经济效益。在中国天然气价格比柴油低很多，当天然气供应系统广泛应用于大功率矿山设备、铁路机车(内燃机车)、船舶、石油系统设备等大型柴油发动机相关设备，能为企业节约大量的燃油成本。据调查了解中煤集团在中国最大的露天煤矿平朔安太堡露天煤矿每年柴油消耗量达到15亿元，如果使用本发明的天然气供应系统，根据目前的LNG和柴油的价格，假定利润率为20％，那么每年就可以节约3亿元柴油成本。
本发明的天然气供应系统具有显著的社会效益。因为天然气燃烧几乎不产生颗粒物，应用天然气供应系统的发动机的排气污染可以大大降低。同时碳排放量也随之降低。根据BP中国碳排放计算器提供的资料，每辆LNG-柴油双燃料车比纯汽油车、柴油车每年可减少CO2排放约60吨，如按照8年使用期计算，每辆车可减少CO2排放约480吨。
附图说明
图1为本发明的大功率LNG-柴油双燃料发动机的天然气供应系统的示意图；
图2为本发明的大功率LNG-柴油双燃料发动机的天然气供应系统的LNG储罐的示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合实施例及附图，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
本发明提供的大功率LNG-柴油双燃料发动机的天然气供应系统(以下简称为天然气供应系统)，包括储存系统、供给系统和控制系统。其中，储存系统与供给系统连接，供给系统同时与储存系统以及发动机连接，控制系统分别与储存系统、供给系统以及发动机通信连接。其中，控制系统包括LNG控制器，以及分别与LNG控制器连接的传感器、显示器、开关；储存系统包括LNG储罐，以及分别与LNG储罐连接的LNG电磁阀、LNG液位传感器、LNG压力传感器，LNG电磁阀、LNG液位传感器和LNG压力传感器分别通信连接至LNG控制器；供给系统包括依次顺序连接的气化器、天然气温度传感器一、放散阀、天然气流量计、天然气电磁阀、手动切断阀、调压器、滤清器、天然气温度传感器二、天然气压力传感器、智能计量阀、集成节气门、混合器，以及柴油流量计。其中天然气温度传感器一、天然气流量计、天然气电磁阀、天然气温度传感器二、天然气压力传感器、智能计量阀、集成节气门以及柴油流量计分别通信连接至LNG 控制器。
以下结合附图，对本发明的天然气供应系统进行详细描述。如图1所示，储存系统包括LNG储罐-左1和LNG储罐-右2、LNG电磁阀-左3和LNG电磁阀-右6、LNG液位传感器-左4和LNG液位传感器-右7、LNG压力传感器-左5和LNG压力传感器-右8。其中，LNG储罐-左1分别与LNG电磁阀-左3、LNG液位传感器-左4、LNG压力传感器-左5连接，而LNG电磁阀-左3、LNG液位传感器-左4、LNG压力传感器-左5分别通信连接至控制系统的LNG控制器45；LNG储罐-右2分别与LNG电磁阀-右6、LNG液位传感器-右7、LNG压力传感器-右8连接，而LNG电磁阀-右6、LNG液位传感器-右7、LNG压力传感器-右8分别通信连接至控制系统的LNG控制器45。其中，LNG电磁阀-左3和LNG电磁阀-右6分别受控制系统的LNG控制器45的控制。LNG储罐-左1和LNG储罐-右2储存高压低温的LNG作为燃料，LNG储罐-左1和LNG储罐-右2的外面分别设置有起保护作用的罐箱(未示出)。
LNG储罐-左1和LNG储罐-右2具有相同的配置。结合图2，仅以LNG储罐-左1为例进行说明。LNG储罐-左1配备安装有压力调节模块、充装模块、液位测量模块、供液模块和真空爆破模块。其中，压力调节模块包括LNG压力传感器-左5、经济阀PCV-1、主安全阀PSV-1、副安全阀PSV-2、管路安全阀TSV-1、回气接口CN-1、放散接口CN-2、回气截止阀HCV-1、压力表PG-1、压力表PG-2。LNG压力传感器-左5测量LNG储罐-左1内的压力并将测量的压力传输至LNG控制器45；经济阀PCV-1的使用可以节省LNG；三个安全阀在管路压力超过一定限值时通过回气截止阀HCV-1、回气接口CN-1、放散接口CN-2放气，保障系统安全；两个压力表显示管路压力。充装模块包括充装接口CN-3、充装截止阀HCV-2、充装止回阀CV-1。操作人员将LNG加注枪连接到充装接口CN-3，打开充装截止阀HCV-2，即可向LNG储罐-左1充装LNG。充装止回阀CV-1防止LNG从LNG储罐-左1倒流出来。液位测量模块包括LNG液位传感器-左4(图2中LS-1)和液位显示器LL-1，LNG液位传感器-左4测量LNG储罐-左1内的LNG液位并将测量的LNG液位传输至LNG控 制器45，同时在液位显示器LL-1上显示。供液模块包括供液止回阀CV-2、过流阀EFV-1、LNG电磁阀-左3(图2中超低温电磁阀SV-1)、供液接口CN-4。打开LNG电磁阀-左3之后，LNG储罐-左1内的LNG在压力作用下，通过上述各零件流向供给系统的气化器-左9。供液止回阀CV-2防止LNG倒流回LNG储罐-左1。过流阀EFV-1限制LNG的流率。真空爆破模块包括真空塞BD-1。其主要作用是在对LNG储罐-左1抽真空时用作接口。另外，万一LNG泄露到真空层，它可以起到泄压的作用。LNG储罐-右2具有与LNG储罐-左1完全相同的配置，在此不再叙述。
如图1所示，供给系统包括气化器-左9和气化器-右10、天然气温度传感器一-左11和天然气温度传感器一-右12、放散阀13、天然气流量计14、天然气电磁阀15、手动切断阀16、调压器17、滤清器18、天然气温度传感器二19、天然气压力传感器20、智能计量阀21、集成节气门-左22和集成节气门-右23、混合器-左24和混合器-右25，以及柴油流量计28。气化器-左9一端与LNG储罐-左1连接，另一端与放散阀13连接。气化器-左9加热气化从LNG储罐-左1流入到其中的LNG。气化器-右10一端与LNG储罐-右2连接，另一端与放散阀13连接，气化器-右10加热气化从LNG储罐-右2流入到其中的LNG。放散阀13、天然气流量计14、天然气电磁阀15、手动切断阀16、调压器17、滤清器18、智能计量阀21依次连接。智能计量阀21连接集成节气门-左22和集成节气门-右23，集成节气门-左22和集成节气门-右23分别连接混合器-左24和混合器-右25，混合器-左24和混合器-右25分别连接至相应增压器。其中，天然气温度传感器一-左11和天然气温度传感器一-右12、天然气流量计14、天然气电磁阀15、天然气温度传感器二19、天然气压力传感器20、智能计量阀21、集成节气门-左22和集成节气门-右23、柴油流量计28分别通信连接至LNG控制器45，并且天然气电磁阀15、智能计量阀21、集成节气门-左22和集成节气门-右23受控制系统的LNG控制器45控制。
供给系统还包括天然气管路26。天然气的流动方向如图1中分别从LNG储罐-左1和LNG储罐-右2出发的箭头走向所示。天然气管路26包括：分别从LNG储罐-左1和LNG储罐-右2至气化器-左9和气化器-右 10的连接管路，气化器-左9和气化器-右10各自至放散阀13的连接管路，放散阀13至天然气流量计14、天然气流量计14至天然气电磁阀15、天然气电磁阀15至手动切断阀16、手动切断阀16至调压器17、调压器17至滤清器18、滤清器18至智能计量阀21的连接管路，从智能计量阀21分别至集成节气门-左22和集成节气门-右23的连接管路，集成节气门-左22至混合器-左24、混合器-左24至发动机的增压器的连接管路，以及集成节气门-右23至混合器-右25、混合器-右25至发动机的增压器的连接管路。天然气管路26将储存系统的LNG以天然气的形式输送至发动机。其中，天然气温度传感器11、12、19和天然气压力传感器20设置在气化器-左9和气化器-右10至智能计量阀21的连接管路上，分别测量管路内天然气的温度和压力并分别将测量的温度和压力传输至LNG控制器45。
供给系统还包括冷却液管路。冷却液的流动方向如图1中从发动机出发的箭头走向所示。冷却液管路包括从发动机分别至气化器-左9和气化器-右10的入口的连接管路，以及从气化器-左9和气化器-右10的出口分别至发动机的连接管路。利用发动机的冷却液分别加热气化器-左9和气化器-右10中的LNG，使之气化为常温的天然气。如图1所示，冷却液通过一条管路从发动机流出后，中途通过该条管路分支出的两条管路分别通过气化器-左9和气化器-右10的入口进入气化器-左9和气化器-右10，然后冷却液分别从气化器-左9和气化器-右10的出口流出，流经两条回流管路，在中途该两条回流管路合并为一条管路，冷却液最后通过该条管路流回发动机。在另一实施例中，冷却液通过两条管路从发动机流出后分别进入气化器-左9和气化器-右10，然后冷却液分别从气化器-左9和气化器-右10的出口流出，通过两条管路流回发动机。流经两个气化器的冷却液各自形成一循环回路。
供给系统主要调节天然气的流量、压力和温度。其中，智能计量阀21控制天然气的总流量并且预防爆震。集成节气门-左22和集成节气门-右23分别控制流向发动机一侧的天然气流量。混合器-左24和混合器-右25沿着周长以及在中心都有开孔。如果天然气压力超过限值，放散阀13会打开，排空留在管路中的天然气，以策安全。
控制系统包括LNG控制器45、传感器(进气压力传感器-左29和进气压力传感器-右30、增压压力传感器31和32、进气歧管压力传感器33和34、进气歧管温度传感器35和36、冷却液温度传感器37、曲轴转速传感器38、凸轮轴转速传感器39、排气温度传感器40、爆震传感器41)、显示器42、开关43和线束44。线束44这里指LNG控制器45与各传感器以及上面所提到的和下面将提到的部件之间的连接线。其中，进气压力传感器-左29安装在混合器-左24的进空气管路上并且通过线束44与LNG控制器45连接，进气压力传感器-右30安装在混合器-右25的进空气管路上并且通过线束44与LNG控制器45连接。进气压力传感器-左29和进气压力传感器-右30分别测量进入混合器-左24和混合器-右25的空气的压力并分别将测量的压力传输至LNG控制器45；增压压力传感器31和32、进气歧管压力传感器33和34、进气歧管温度传感器35和36、冷却液温度传感器37、曲轴转速传感器38、凸轮轴转速传感器39、排气温度传感器40、爆震传感器41安装在发动机上，并分别通过线束44将各自测量的信息传输至LNG控制器45。开关43控制柴油模式或者双燃料模式的选择。
控制系统是本发明的天然气供应系统的整个技术的核心与难点。操作者可以利用开关43来手动选择柴油模式或者双燃料模式，也可以通过LNG控制器45自动地控制开关43以选择柴油模式或者双燃料模式。在双燃料模式下，LNG控制器45与发动机自带的电控单元46配合工作，采集计算天然气参数和发动机运行参数。无论车辆是电力驱动或者机械驱动，电控单元46都能采集相应的负荷数值。LNG控制器45根据发动机转速和负荷得出理想的替代率。在不同工况(转速和扭矩)下，LNG控制器45可以自动控制LNG电磁阀-左3和LNG电磁阀-右6、天然气电磁阀15、智能计量阀21以及集成节气门-左22和集成节气门-右23的开关和开度，再加上预设的调压器17的压力，LNG控制器45能够稳定精确地控制天然气的流量、压力和温度，从而获得理想的替代率。无论被改装的柴油机状态(新旧、性能差异等)如何，本发明的天然气供应系统都能获得最合理的替代率。最高替代率可以达到70％。替代率定义为当发动机 在柴油和双燃料模式下以相同的转速和功率运行时，双燃料模式下柴油消耗率与柴油模式下柴油消耗率相比而减少的百分比。
LNG控制器45除了如上所述获得理想的替代率，还监测所有传感器和仪表的输入及输出，确保各参数都在允许的范围内。在任何不正常的情况下，例如天然气压力过高或者天然气泄露，LNG控制器45都会立即关闭天然气系统，使发动机回到纯柴油模式。并且双燃料模式和纯柴油模式之间的切换非常顺畅，发动机的转速和功率几乎没有波动。在此情况下，操作者在关机前不能强行用开关43使发动机回到双燃料模式，这是额外的安全措施。在紧急情况下，放散阀13会打开，排空留在管路中的天然气，以策安全。
显示器42安装在车辆驾驶室(未显示)，实时显示天然气供应系统的所有关键参数。这样司机可以随时了解车辆的运行状况。一旦发生故障，显示器42会自动报警。
在本发明的天然气供应系统的一优选实施例中，本发明的天然气供应系统成功应用于一台240吨矿车的V形大功率发动机上。矿车用大功率发动机多数为V形。
首先，根据矿车的实际负荷循环，适当设计柴油箱以及LNG储罐-左1和LNG储罐-右2，保证每次换班时，同时充装柴油和LNG，以节省时间并且提高工作效率。发动机排量为76升，额定转速为1900rpm，额定功率为1865kW。在中间转速以及中高负荷下运行双燃料模式。双燃料模式下的发动机动力性能和效率与纯柴油模式下的相同。发动机的其它参数，例如排气温度、冷却水温度、机油温度等都在发动机厂商设定的范围内。
其次，主要装配工作包括：安装专用的较小容量的柴油箱，在液压油箱外面加装LNG储罐-左1和气化器-左9，在柴油箱外面加装LNG储罐-右2和气化器-右10。在发动机上安装集成节气门-左22和集成节气门-右23、混合器-左24和混合器-右25、柴油流量计28、进气压力传感器-左29和进气压力传感器-右30、增压压力传感器31和32、进气歧管压力传感 器33和34、进气歧管温度传感器35和36、冷却液温度传感器37、曲轴转速传感器38、凸轮轴转速传感器39、排气温度传感器40、爆震传感器41。在车架(未示出)上并且在增压器上游安装天然气温度传感器11和12以及19、放散阀13、天然气流量计14、天然气电磁阀15、手动切断阀16、调压器17、滤清器18、天然气压力传感器20、智能计量阀21。在驾驶室内安装LNG控制器45、显示器42、开关43。在发动机、车架、驾驶室布置线束44。本发明的天然气供应系统对发动机本身的零部件的改动非常小。发动机原有的所有设定，例如喷油正时、气门正时、压缩比等，都保持不变。
在双燃料模式下，LNG电磁阀-左3和LNG电磁阀-右6、天然气电磁阀15、手动切断阀16被打开后，LNG在压力作用下从LNG储罐-左1和LNG储罐-右2分别流入相连的气化器-左9和气化器-右10，并分别在气化器-左9和气化器-右10中加热气化为天然气。天然气依次流经放散阀13、天然气流量计14、天然气电磁阀15、手动切断阀16、调压器17、滤清器18、智能计量阀21、集成节气门-左22和集成节气门-右23、混合器-左24和混合器-右25、增压器、进气歧管，最后进入发动机气缸(未显示)。智能计量阀21控制天然气的总流量并且预防爆震。集成节气门-左22和集成节气门-右23分别控制流向发动机一侧的天然气流量，这样发动机的两侧可以平衡。混合器-左24和混合器-右25沿着周长以及在中心都有开孔。而且，增压器压缩机的叶片转速非常高。这些都使得天然气和空气能良好地混合。
在双燃料模式下，LNG控制器45与发动机自带的电控单元46配合工作，采集计算天然气参数和发动机运行参数。在不同工况(转速和扭矩)下，LNG控制器45可以自动控制LNG电磁阀-左3和LNG电磁阀-右6、天然气电磁阀15、智能计量阀21以及集成节气门-左22和集成节气门-右23的开关和开度，再加上预设的调压器17的压力，LNG控制器45能够稳定精确地控制天然气的流量、压力和温度，从而获得理想的替代率。同时LNG控制器45还监测所有传感器和仪表的输入及输出，确保各参数都在允许的范围内。在任何不正常的情况下，例如天然气压力过高或者天然 气泄漏，LNG控制器45都会立即关闭天然气系统，使发动机回到纯柴油模式。双燃料模式和纯柴油模式之间的切换非常顺畅，发动机的转速和功率几乎没有波动。在此情况下，操作者在关机前不能强行用开关43使发动机回到双燃料模式，这是额外的安全措施。在紧急情况下，放散阀13会打开，排空留在管路中的天然气，以策安全。
驾驶室内安装的专用显示器42，实时显示天然气系统的所有关键参数。司机可以随时了解矿车的运行状况。一旦发生故障，显示器42会自动报警。
本发明的天然气供应系统应用于矿车用大功率发动机上的最大替代率为70％。整个负荷循环的平均替代率为30-40％，这意味着如果原柴油机柴油耗为100千克/小时，则双燃料发动机的柴油耗为60-70千克/小时。节省的柴油的成本减去使用的天然气的成本，即为节省的燃料成本。双燃料发动机的燃料成本比原柴油发动机可减少20％-30％。
本发明的大功率LNG-柴油双燃料发动机的天然气供应系统，实现了模块化，对原设备(包括发动机)的改动非常小。
本发明中为了清楚起见，使用的左、右的表达方式是为了简单描述相邻部件之间的相对连接关系，如LNG储罐-左1、气化器-左9是为了表明气化器-左9与LNG储罐-左1连接；而集成节气门-左22、混合器-左24是为了表明集成节气门-左22与混合器-左24连接，并且在从智能计量阀21之后分支的两个管路中的一条管路上，并不表示与气化器-左9对应连接。此外，公开的连接方式是本发明的优选实施方式，本发明并不限于公开的连接方式。
以上所述实施例仅表达了本发明的实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。

Claims (10)

  1. 一种大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，包括储存系统、供给系统和控制系统，其中，所述储存系统与所述供给系统连接，所述供给系统同时与所述储存系统以及发动机连接，所述控制系统分别与所述储存系统、所述供给系统以及所述发动机通信连接；
    其中，所述控制系统包括LNG控制器，以及分别与所述LNG控制器连接的传感器、显示器、开关；所述储存系统包括LNG储罐，以及分别与所述LNG储罐连接的LNG电磁阀、LNG液位传感器、LNG压力传感器，所述LNG电磁阀、LNG液位传感器和LNG压力传感器分别通信连接至所述LNG控制器；所述供给系统包括依次顺序连接的气化器、天然气温度传感器一、放散阀、天然气流量计、天然气电磁阀、手动切断阀、调压器、滤清器、天然气温度传感器二、天然气压力传感器、智能计量阀、集成节气门、混合器以及柴油流量计，其中所述天然气温度传感器一、天然气流量计、天然气电磁阀、天然气温度传感器二、天然气压力传感器、智能计量阀、集成节气门以及柴油流量计分别通信连接至所述LNG控制器。
  2. 根据权利要求1所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，所述控制系统的所述开关控制柴油模式或者双燃料模式的选择。
  3. 根据权利要求2所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，在所述双燃料模式下，所述LNG控制器与所述发动机自带的电控单元配合工作，采集计算天然气参数和发动机运行参数。
  4. 根据权利要求3所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，所述LNG控制器自动控制所述LNG电磁阀、天然气电磁阀、智能计量阀以及集成节气门的开关和开度。
  5. 根据权利要求1所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，所述控制系统的所述传感器包括进气压力传感器、 增压压力传感器、进气歧管压力传感器、进气歧管温度传感器、冷却液温度传感器、曲轴转速传感器、凸轮轴转速传感器、排气温度传感器、爆震传感器。
  6. 根据权利要求5所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，所述进气压力传感器、增压压力传感器、进气歧管压力传感器、进气歧管温度传感器均为两个。
  7. 根据权利要求1所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，所述供给系统的所述气化器、天然气温度传感器一、集成节气门、混合器均为两个。
  8. 根据权利要求1所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，所述储存系统的所述LNG储罐、LNG电磁阀、LNG液位传感器、LNG压力传感器均为两个。
  9. 根据权利要求1所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，所述LNG储罐配备安装有压力调节模块、充装模块、液位测量模块、供液模块和真空爆破模块。
  10. 根据权利要求1所述的大功率LNG-柴油双燃料发动机的天然气供应系统，其特征在于，所述供给系统还包括天然气管路和冷却液管路。
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CN113697311A (zh) * 2021-09-07 2021-11-26 南通四方罐式储运设备制造有限公司 一种防爆智能温控罐式集装箱

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