CN117128115A - Fuel supply system and method for marine diesel engine - Google Patents
Fuel supply system and method for marine diesel engine Download PDFInfo
- Publication number
- CN117128115A CN117128115A CN202311320706.1A CN202311320706A CN117128115A CN 117128115 A CN117128115 A CN 117128115A CN 202311320706 A CN202311320706 A CN 202311320706A CN 117128115 A CN117128115 A CN 117128115A
- Authority
- CN
- China
- Prior art keywords
- methanol
- pressure
- diesel engine
- oil tank
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 28
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 1182
- 238000003860 storage Methods 0.000 claims abstract description 47
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 94
- 239000011261 inert gas Substances 0.000 claims description 37
- 238000009423 ventilation Methods 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 13
- 230000001276 controlling effect Effects 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 8
- 239000002283 diesel fuel Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000000295 fuel oil Substances 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010771 distillate fuel oil Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ZBKGSTPKYXTFCV-UHFFFAOYSA-N [N].[F].[S] Chemical compound [N].[F].[S] ZBKGSTPKYXTFCV-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0064—Layout or arrangement of systems for feeding fuel for engines being fed with multiple fuels or fuels having special properties, e.g. bio-fuels; varying the fuel composition
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention provides a fuel supply system and a method for a marine diesel engine, comprising the following steps: a main cabin provided with a diesel engine; a high-pressure methanol supply device for supplying high-pressure methanol to the main cabin to match with the diesel engine for providing power; the high-pressure methanol supply device comprises a methanol filling station, a methanol storage bin, a methanol daily oil tank, a filter unit, a pump unit, a fuel valve unit, a return pipeline and a cooler, which are connected through pipelines in sequence. The filter unit and the pump unit are used for filtering and pressurizing the methanol, so that the methanol can reach the high pressure methanol required by the medium-speed diesel engine, and the matching degree of the methanol supply system and various ships is enlarged; the flow speed and the flow quantity of the methanol can be effectively controlled through the fuel valve unit, so that the control of the running state of the main engine room is facilitated; the use efficiency of the methanol can be improved through the return pipeline, and the energy waste is reduced. Solves the problem that the existing low-pressure methanol supply system cannot be applied to all ships.
Description
Technical Field
The invention relates to the technical field of marine diesel engine fuel supply, in particular to a fuel supply system and method of a marine diesel engine.
Background
The international maritime organization passes the strategy of reducing emission of greenhouse gases of ships in 2018, and proposes the prospect of realizing zero emission of the greenhouse gases of the international maritime in 2050, and a host of a large-scale ship is gradually enlarged to be refitted from traditional diesel oil and heavy oil to use various clean low-carbon energy sources as fuels. LNG (liquefied natural gas) power, which can reduce carbon emissions by 20 to 25% and nitrogen oxide emissions by 20 to 30% relative to conventional diesel power, is currently the mainstream trend, whereas methanol fuel (CH 3 OH), which is a biodegradable alcohol, has the lowest carbon content and the highest hydrogen content among all liquid fuels, and is easy to store and handle on board of a ship, has been incorporated into IGF specifications. When methanol is produced using renewable resources such as biological sources, it is considered to be green methanol if the electricity used to produce methanol is from renewable energy sources. Green methanol can reduce about 80% of CO compared to LFO (light fuel oil) 2 Discharged, about 50% of NO x Emissions and about 50% FSN (fluorine sulfur nitrogen mixture) emissions.
However, the low pressure methanol supply systems currently prevailing in the market are large low speed two-stroke diesel engines used on ocean going vessels. Most propulsion devices of ocean engineering ships and equipment adopt electric propulsion, and the ship is only provided with a large medium-speed four-stroke diesel generator to provide power for whole ship equipment, so that the marine engineering ship and equipment cannot be compatible with the existing low-pressure methanol supply system.
Disclosure of Invention
The invention aims to provide a fuel supply system and method of a marine diesel engine, which are used for solving the problem that the existing low-pressure methanol supply system cannot be applied to all ships.
In order to solve the above technical problems, the present invention provides a fuel supply system of a marine diesel engine, comprising:
a main nacelle provided with a diesel engine;
the high-pressure methanol supply device is used for supplying high-pressure methanol to the main engine room so as to supply power in cooperation with the diesel engine; the high-pressure methanol supply device comprises a methanol filling station, a methanol storage bin, a methanol daily oil tank, a filter unit, a pump unit, a fuel valve unit, a return pipeline and a cooler, which are connected through pipelines in sequence; the methanol filling station is used for filling methanol into the methanol storage bin; the methanol storage bin is used for storing methanol; the methanol daily oil tank is used for temporarily storing methanol to be used and purifying the methanol which flows back; the filter unit is used for filtering methanol; the pump unit is used for pressurizing methanol; the fuel valve unit is used for controlling the flow speed and the flow quantity of the methanol; the reflux pipeline is used for refluxing redundant methanol to the methanol daily oil tank; the cooler is used for cooling the methanol.
Optionally, in the fuel supply system of the marine diesel engine, a pressure breather valve and an inert gas supply valve are respectively arranged at the top of the methanol storage bin and the top of the methanol daily oil tank; the pressure breather valve is used for controlling the internal pressure of the methanol storage bin and the internal pressure of the methanol daily oil tank; the inert gas supply valve is used for enabling the upper space inside the methanol storage bin and the methanol daily oil tank to be filled with inert gas.
Optionally, in the fuel supply system of a marine diesel engine, a partition board is arranged inside the methanol daily oil tank so as to divide the inside of the methanol daily oil tank into a first section and a second section, wherein the top of the first section and the top of the second section are communicated; the first interval is provided with an output pipeline; the bottoms of the first interval and the second interval are respectively provided with a discharge valve, and the discharge valves are used for discharging impurities precipitated at the bottoms of the first interval and the second interval; the top of the first section and the top of the second section are respectively connected with the return pipeline.
Optionally, in the fuel supply system of a marine diesel engine, the return line includes a main engine return line, a fuel valve return line, and a low pressure supply return line; the host oil return pipeline is used for returning redundant methanol in the host cabin to the second interval; the fuel valve oil return pipeline is used for returning redundant methanol at the fuel valve unit to the first section; the low-pressure supply and return pipeline is used for returning redundant methanol at the output pipeline of the methanol daily oil tank to the first section.
Optionally, in the fuel supply system of a marine diesel engine, the filter unit includes a first filter assembly, a second filter assembly, and a third filter assembly; the first filter component is arranged on a pipeline between the methanol storage bin and the methanol daily oil tank; the second filter component is arranged on an output pipeline of the methanol daily oil tank; the third filter assembly is arranged on an input pipeline of the main engine room.
Optionally, in the fuel supply system of a marine diesel engine, the second filter assembly and the third filter assembly each include two parallel filters, and the two parallel filters alternately operate.
Optionally, in the fuel supply system of a marine diesel engine, the pump unit includes a circulation pump unit, a low pressure supply pump unit, and a high pressure supply pump unit; the circulating pump set is arranged on a pipeline between the methanol storage bin and the methanol daily oil tank so as to convey the methanol in the methanol storage bin to the methanol daily oil tank; the low-pressure supply pump set is arranged on an output pipeline of the methanol daily oil tank so as to adjust the pressure of the methanol output by the methanol daily oil tank to a first preset pressure; the high-pressure supply pump set is arranged on an input pipeline of the main engine room so as to adjust the pressure of the methanol to be fed into the main engine room to a second preset pressure; the first preset pressure is less than the second preset pressure.
Optionally, in the fuel supply system of a marine diesel engine, the circulation pump group, the low pressure supply pump group and the high pressure supply pump group each include two parallel pumps, and the two parallel pumps alternately operate.
Optionally, in the fuel supply system of a marine diesel engine, the high-pressure methanol supply device further includes a proportion control unit, where the proportion control unit includes a first proportion control component disposed at an output end of the low-pressure supply pump group and a second proportion control component disposed at an output end of the high-pressure supply pump group; the first proportion control component and the second proportion control component comprise a pressure sensor and a proportion regulating valve, the pressure sensor is used for monitoring the pressure of the methanol output by the output end of the low-pressure supply pump set and the pressure of the methanol output by the output end of the high-pressure supply pump set, and the proportion regulating valve is used for regulating the flow of the methanol at the positions of the low-pressure supply pump set and the high-pressure supply pump set according to the pressure monitored by the pressure sensor.
Optionally, in the fuel supply system of the marine diesel engine, the fuel supply system of the marine diesel engine further comprises a purging device, wherein the purging device comprises an inert gas generator and a methanol bleeder cabinet; the inert gas generator is used for providing inert gas for the filter unit and the diesel engine to blow off residual methanol; the methanol discharging cabinet is used for collecting the blown-off methanol and the superfluous methanol in the pipeline.
Optionally, in the fuel supply system of a marine diesel engine, the fuel supply system of a marine diesel engine further comprises an oil return device and a ventilation device; the oil return device is used for shunting the redundant methanol in the main engine cabin and then returning the methanol to the diesel engine and flowing into the return pipeline; the ventilation device is used for monitoring the methanol leakage state of the main engine room and ventilating the main engine room.
In order to solve the above technical problems, the present invention also provides a fuel supply method of a marine diesel engine, which is applied to the fuel supply system of a marine diesel engine as set forth in any one of the above, the fuel supply method of a marine diesel engine comprising:
acquiring the working condition of a main engine room;
starting a high-pressure methanol supply device according to the working condition of the main engine room so as to provide methanol for the main engine room;
the operation of the main cabin and the high-pressure methanol supply device is controlled according to the operation state of the main cabin.
Optionally, in the fuel supply method of a marine diesel engine, the method for starting the high-pressure methanol supply device according to the working condition of the main cabin to provide methanol for the main cabin includes:
when the working condition load of the main engine room is 20% -70%, the fuel oil energy supply mode is switched to the methanol energy supply mode;
in the methanol power mode, the high pressure methanol supply device supplies methanol to the main compartment.
Optionally, in the fuel supply method of a marine diesel engine, the method for supplying methanol to the main cabin by the high-pressure methanol supply device in the methanol power mode includes:
the methanol flows out from the methanol storage bin and enters the methanol daily oil tank;
methanol flows out of the methanol daily oil tank and is pressurized to a first preset pressure through a second filter component of the filter unit and a low-pressure supply pump group of the pump group unit;
the methanol pressurized to the preset low pressure passes through the fuel valve unit to enable the flow rate and the flow quantity to reach the preset flow rate and the second preset pressure is pressurized through the third filter component of the filter unit and the high-pressure supply pump unit of the pump unit;
the methanol pressurized to a preset high pressure is cooled by a cooler and then enters the main cabin.
The invention provides a fuel supply system and a fuel supply method for a marine diesel engine, comprising the following steps: a main nacelle provided with a diesel engine; the high-pressure methanol supply device is used for supplying high-pressure methanol to the main engine room so as to supply power in cooperation with the diesel engine; the high-pressure methanol supply device comprises a methanol filling station, a methanol storage bin, a methanol daily oil tank, a filter unit, a pump unit, a fuel valve unit, a return pipeline and a cooler, which are connected through pipelines in sequence; the methanol filling station is used for filling methanol into the methanol storage bin; the methanol storage bin is used for storing methanol; the methanol daily oil tank is used for temporarily storing methanol to be used and purifying the methanol which flows back; the filter unit is used for filtering methanol; the pump unit is used for pressurizing methanol; the fuel valve unit is used for controlling the flow speed and the flow quantity of the methanol; the reflux pipeline is used for refluxing redundant methanol to the methanol daily oil tank; the cooler is used for cooling the methanol. The filter unit and the pump unit are used for filtering and pressurizing the methanol, so that the methanol can reach the high pressure methanol required by the medium-speed diesel engine, and the matching degree of the methanol supply system and various ships is enlarged; the flow speed and the flow quantity of the methanol can be effectively controlled through the fuel valve unit, so that the control of the running state of the main engine room is facilitated; the use efficiency of the methanol can be improved through the return pipeline, and the energy waste is reduced. Solves the problem that the existing low-pressure methanol supply system cannot be applied to all ships.
Drawings
Fig. 1 is a schematic diagram of a fuel supply system of a marine diesel engine according to the present embodiment;
fig. 2 is a detailed schematic diagram of the fuel supply system of the marine diesel engine according to the present embodiment;
fig. 3 is a flowchart of a fuel supply method of the marine diesel engine according to the present embodiment;
fig. 4 is a flow chart showing the operation of the high-pressure methanol supply apparatus according to the present embodiment;
wherein, each reference sign is explained as follows:
100-a main nacelle; 110-diesel engine; a control unit 120;
200-high pressure methanol supply device; 210-methanol filling station; 220-methanol storage bin; 221-pressure breather valve; 222-an inert gas supply valve; 230-a methanol daily oil tank; 231-pressure respiratory valve; 232-an inert gas supply valve; 233-separator; 234-a bleeder valve; 241-a first filter assembly; 242-a second filter assembly; 243-a third filter assembly; 251-a circulation pump set; 252-low pressure supply pump set; 253-high pressure feed pump set; 260-fuel valve unit; 270-return line; 271-a main engine oil return pipeline; 272-fuel valve return line; 273-low pressure feed return line; 280-cooler; 291-first proportional control component; 292-a second proportional control component; 2901-pressure sensor; 2902-proportional control valve;
310-an inert gas generator; 320-methanol bleeder cabinet; 400-oil return device; 500-ventilation device.
Detailed Description
The fuel supply system and method for a marine diesel engine according to the present invention will be described in further detail with reference to the accompanying drawings and examples. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
It is noted that "first", "second", etc. in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects so as to describe embodiments of the present invention, and not to describe a specific order or sequence, it should be understood that the structures so used may be interchanged under appropriate circumstances. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present embodiment provides a fuel supply system of a marine diesel engine, as shown in fig. 1, including: a main nacelle 100, said main nacelle 100 being provided with a diesel engine 110; a high-pressure methanol supply device 200 for supplying high-pressure methanol to the main cabin 100 to supply power in cooperation with the diesel engine 110.
The high-pressure methanol supply device 200 comprises a methanol filling station 210, a methanol storage bin 220, a methanol daily oil tank 230, a filter unit, a pump unit, a fuel valve unit 260, a return pipeline 270 and a cooler 280, which are connected in sequence through pipelines; the methanol filling station 210 is configured to fill the methanol storage compartment 220 with methanol; the methanol storage bin 220 is used for storing methanol; the methanol daily oil tank 230 is used for temporarily storing methanol to be used and purifying the methanol which flows back; the filter unit is used for filtering methanol; the pump unit is used for pressurizing methanol; the fuel valve unit 260 is used to control the flow rate and flow rate of methanol; the return line 270 is configured to return excess methanol to the methanol tank 230; the cooler 280 is used to cool the methanol.
According to the fuel supply system of the marine diesel engine, provided by the embodiment, the filter unit and the pump unit are used for filtering and pressurizing the methanol, so that the methanol can reach high-pressure methanol required by the medium-speed diesel engine, and the matching degree of the methanol supply system and various ships is enlarged; the flow speed and the flow quantity of the methanol can be effectively controlled through the fuel valve unit 260, so that the control of the operation state of the main engine room 100 is facilitated; the use efficiency of methanol can be improved and the energy waste can be reduced by the return line 270. Solves the problem that the existing low-pressure methanol supply system cannot be applied to all ships.
Further, as shown in fig. 2, a pressure breather valve 221/231 and an inert gas supply valve 222/232 are respectively arranged at the top of the methanol storage bin 220 and the top of the methanol daily oil tank 230; the pressure breather valve 221/231 is used for controlling the internal pressure of the methanol storage bin 220 and the methanol daily oil tank 230; the inert gas supply valve 222/232 is used to fill the internal upper space of the methanol storage compartment 220 and the methanol tank 230 with inert gas.
Specifically, in order to ensure that the internal pressure of the methanol storage bin 220 or the methanol daily oil tank 230 is stable, an accident caused by too high pressure due to too much input methanol is avoided, and ventilation is realized between the pressure breather valve 221/231 and the external environment, so that the internal pressure of the methanol storage bin 220 or the methanol daily oil tank 230 is ensured to be stable within a safe range. Meanwhile, in order to avoid explosion caused by contact of methanol with external air when the methanol storage bin 220 or the methanol daily oil tank 230 is ventilated with external environment by the pressure breathing valve 221/231, the embodiment inputs inert gas to the methanol storage bin 220 or the methanol daily oil tank 230 through the inert gas supply valve 222/232, thereby isolating methanol from external air by using inert gas at the upper layer of the methanol storage bin 220 or the methanol daily oil tank 230.
Further, as shown in fig. 2, a partition 233 is disposed inside the methanol-based oil tank 230 in this embodiment, so as to divide the inside of the methanol-based oil tank 230 into a first section a and a second section B with communicated tops; the first section A is provided with an output pipeline; the bottoms of the first interval A and the second interval B are respectively provided with a release valve 234, and the release valves 234 are used for discharging impurities precipitated at the bottoms of the first interval A and the second interval B; the top of the first section a and the top of the second section B are respectively connected to the return line 270.
Because the methanol daily oil tank 230 is used for providing methanol to the main engine room 100, the methanol daily oil tank 230 needs to ensure the purity of the methanol output by the methanol daily oil tank; in this embodiment, in order to increase the utilization rate of methanol, the remaining methanol in each part of the fuel supply system is collected and flows back to the methanol daily oil tank 230, which leads to unavoidable impurities in the recovered methanol. In order to filter out part of impurities, in this embodiment, a partition 233 is disposed in the methanol tank 230, and the internal space is divided into two areas with communicated tops, so that enough time can be ensured to deposit impurities in the methanol in the second interval B, so as to improve the purity of the methanol. Meanwhile, in order to timely remove impurities, the problem that the purification effect is affected due to excessive impurity accumulation is avoided, the bottom of the first section A and the bottom of the second section B are respectively provided with a release valve 234, and impurities are discharged by opening the release valve 234 periodically or according to the deposited impurity amount, so that the cleanliness of the inside of the methanol daily oil tank 230 is ensured.
Preferably, in this embodiment, the methanol recovered from different areas flows back to the methanol daily oil tank 230 through different pipelines, so that the pipelines with more impurities can be introduced into the second interval B, and the pipelines with less impurities can be introduced into the first interval a, thereby improving the purifying effect of the methanol while guaranteeing the methanol supply.
Specifically, as shown in fig. 2, a pipe into which the methanol storage compartment 220 flows is connected to the first section a. And, the return line 270 includes a main return line 271, a fuel valve return line 272, and a low pressure supply return line 273; since the methanol remaining in the main compartment 100 flows through all components of the fuel supply system, the methanol is most contaminated, and the main return line 271 returns the excess methanol in the main compartment 100 to the second section B; and the residual methanol impurities at the output pipelines of the fuel valve unit 260 and the methanol daily oil tank 230 are less, so that the fuel valve oil return pipeline 272 returns the residual methanol at the fuel valve unit 260 to the first section a, and the low-pressure supply return pipeline 273 returns the residual methanol at the output pipeline of the methanol daily oil tank 230 to the first section a.
Further, in the present embodiment, as shown in fig. 1, the filter unit includes a first filter assembly 241, a second filter assembly 242, and a third filter assembly 243; the first filter component 241 is arranged on a pipeline between the methanol storage bin 220 and the methanol daily oil tank 230; the second filter assembly 242 is arranged on an output pipeline of the methanol daily oil tank 230; the third filter assembly 243 is provided in the inlet line of the main nacelle 100.
Specifically, as compared to fig. 2, the first filter assembly 241 is a single filter for filtering the methanol flowing out of the methanol storage compartment 220; the second filter assembly 242 and the third filter assembly 243 each comprise two parallel filters that are operated alternately to effect release, inerting, blowing and cleaning of the filter of methanol flowing therethrough. By designing the second filter assembly 242 and the third filter assembly 243 as one-by-one, and switching when the filter reaches a set value from the differential pressure gauge, the plugged filter can be sequentially subjected to operations such as fuel release, inerting, blowing, cleaning, etc., thereby improving the safety and efficiency of the system operation. In addition, the third filter assembly 243 has higher filtering precision, so as to ensure the cleanliness of the methanol entering the main cabin 100, and improve the safety and stability of the operation of the main cabin 100.
Further, as shown in fig. 1 and 2, the pump unit includes a circulation pump unit 251, a low pressure supply pump unit 252, and a high pressure supply pump unit 253; the circulation pump group 251 is arranged on a pipeline between the methanol storage bin 220 and the methanol daily oil tank 230, so as to convey the methanol in the methanol storage bin 220 to the methanol daily oil tank 230; the low-pressure supply pump unit 252 is arranged on an output pipeline of the methanol daily oil tank 230 to adjust the pressure of the methanol output by the methanol daily oil tank 230 to a first preset pressure; the high-pressure supply pump unit 253 is provided at an input line of the main cabin 100 to adjust the pressure of the methanol to be introduced into the main cabin 100 to a second preset pressure; the first preset pressure is less than the second preset pressure.
Preferably, in this embodiment, the circulating pump unit 251, the low pressure supply pump unit 252 and the high pressure supply pump unit 253 each comprise two parallel pumps, and the two parallel pumps are operated alternately. By designing the circulation pump set 251, the low-pressure supply pump set 252 and the high-pressure supply pump set 253 as one-to-one, the system can still be used normally when one pump fails abnormally, and the safety and the high efficiency of the system operation are improved.
In the present embodiment, the low pressure supply pump unit 252 regulates the pressure of methanol to 10bar, and the high pressure supply pump unit 253 regulates the pressure of methanol to 600bar, thereby achieving efficient, stable, safe supply of high pressure methanol.
In this embodiment, as shown in fig. 2, the fuel valve unit 260 specifically includes a double cutoff ventilation valve, a main cutoff valve, an exhaust valve, a flow meter, etc., by which the supply of methanol can be isolated between the low pressure supply pump group 252 and the high pressure supply pump group 253, and functions as a safety device at the time of emergency stop, so that the supply of methanol can be flexibly regulated, and the safety of the fuel supply system can be improved.
Further, in this embodiment, as shown in fig. 1 and 2, the high-pressure methanol supply apparatus further includes a proportional control unit, where the proportional control unit includes a first proportional control component 291 disposed at an output end of the low-pressure supply pump unit and a second proportional control component 292 disposed at an output end of the high-pressure supply pump unit; the first proportional control component 291 and the second proportional control component 292 each comprise a pressure sensor 2901 and a proportional control valve 2902, wherein the pressure sensor 2901 is used for monitoring the pressure of the methanol output by the output end of the low-pressure supply pump set 252 and the pressure of the methanol output by the output end of the high-pressure supply pump set 253, and the proportional control valve 2902 is used for adjusting the flow rate of the methanol at the low-pressure supply pump set 252 and the high-pressure supply pump set 253 according to the pressure monitored by the pressure sensor 2901.
Further, in the present embodiment, as shown in fig. 2, the fuel supply system of the marine diesel engine further includes a purge device, which includes an inert gas generator 310 and a methanol bleed tank 320; the inert gas generator 210 is used for providing inert gas to the filter unit and the diesel engine 110 to blow off residual methanol; the methanol bleed tank 320 is used to collect the purged methanol and excess methanol in the pipeline.
Specifically, in this embodiment, the output end of the inert gas generator 310 is provided with a plurality of pipelines, so that the inert gas generated by the inert gas generator 310 passes through different pipelines to reach different area positions, and the area positions are purged; in addition, valves can be arranged on different pipelines to flexibly control the on-off of the different pipelines, so that the flexibility of purging is improved. For example, residual liquid methanol and evaporated gas in the methanol pipelines in the second filter assembly 242, the third filter assembly 243 and the diesel engine 110 are purged by inert gas and then discharged to the ventilation mast, so as to realize inerting blowing, thereby thoroughly releasing the residual methanol during shutdown or maintenance of the whole system and ensuring the safety of ships.
Preferably, the inert gas supply valves 222/232 provided at the top of the methanol storage compartment 220 and the top of the methanol/oil tank 230 are connected to an inert gas generator 310, so that inert gas is supplied to the methanol storage compartment 220 and the methanol/oil tank 230 by using the inert gas generator 310. In the present embodiment, nitrogen is used as the inert gas, but other inert gases may be selected in other embodiments.
And, in the present embodiment, the input end of the methanol relief tank 320 is provided with a plurality of pipelines, so that the methanol at different areas of the fuel supply system can flow back to the methanol relief tank 320 through the pipelines. The methanol relief cabinet is positioned at the lowest part of the whole methanol fuel supply system, so that the methanol recovery efficiency can be improved by utilizing potential difference. In addition, a liquid Level Switch (LS) can be further arranged in the methanol discharging cabinet 320, and the amount of the methanol collected in the methanol discharging cabinet 320 can be timely known through the liquid level switch, so that the recovered methanol can be timely treated.
Further, as shown in fig. 2, the fuel supply system of the marine diesel engine further includes an oil return device 400 and a ventilation device 500; the oil return device 400 is configured to split the excess methanol in the main cabin 100 and then return the split methanol to the diesel engine 110 and flow into the return line 270; the ventilation device 500 is used for monitoring the methanol leakage state of the main cabin 100 and ventilating the main cabin 100.
Specifically, the oil return device 400 provided in this embodiment includes a pressure reducing valve, a cooler, a gas-liquid buffer tank, and the like. The redundant methanol at the main cabin 100 reaches a pressure reducing valve through a return pipeline, is reduced in pressure (the set pressure is 10bar in the embodiment) through the pressure reducing valve and is divided into two paths, one path of methanol is cooled by a cooler and then flows back to the input end of the high-pressure supply pump group 253, and is recycled and conveyed to the diesel engine 110; the other path is subjected to gas-liquid separation through a gas-liquid buffer tank, and the liquid returns to the second section B of the methanol daily oil tank 230 through the main engine oil return pipeline 271.
And, in the present embodiment, the ventilation device 500 is a cabin double-wall pipe ventilation device, wherein the double-wall pipe interlayer space is provided with a redundant fan set to provide ventilation for the main cabin 100, in particular, a ventilation amount of not less than 30 times/hour can be provided; meanwhile, a gas detection sensor is also arranged for detecting the methanol leakage state of the system, and a flow sensor is also arranged for detecting the change of air quantity, so that the ventilation air quantity is ensured to meet the requirement. The ventilation device 500 can effectively prevent the methanol supply pipeline from leaking at the high-risk mechanical parts such as the engine room and the like to cause safety accidents.
In this embodiment, as shown in fig. 2, the main nacelle 100 is further provided with a control unit 120 for sealing the cylinder head of the diesel engine 110 and controlling the fuel injection process. Specifically, the control unit comprises a fourth filter assembly and an oil pump group, wherein the oil pipe lubricating oil is delivered to an oil injection matching part of the diesel engine 110 in a pressurized way through the fourth filter assembly and the oil pump group, one path of lubricating oil is pressurized to 400bar (control oil), and the opening of the oil injection matching part of the diesel engine and the starting control of a safety valve are controlled; the other path of lubricating oil was pressurized to 700bar (sealing oil) for nozzle lubrication and to prevent internal leakage of methanol. In a specific application, 600bar of high-pressure methanol is injected in a fuel common rail at a position, close to a top dead center, of a piston operation through electric control, and ignition is performed through a small amount of ignition oil to burn in a cylinder.
The present embodiment also provides a fuel supply method for a marine diesel engine, which is applied to the fuel supply system for a marine diesel engine as described above, as shown in fig. 3, and includes:
s1, acquiring working conditions of a main engine room;
s2, starting a high-pressure methanol supply device according to the working condition of the main engine room so as to provide methanol for the main engine room;
and S3, controlling the operation of the main engine room and the high-pressure methanol supply device according to the operation state of the main engine room.
Further, in the present embodiment, step S2, the method for starting the high-pressure methanol supply device according to the working condition of the main nacelle to provide methanol to the main nacelle includes:
when the working condition load of the main engine room is 20% -70%, the fuel oil energy supply mode is switched to the methanol energy supply mode;
in the methanol power mode, the high pressure methanol supply device supplies methanol to the main compartment.
Specifically, in this embodiment, referring to fig. 4, the method for providing methanol to the main nacelle by the high-pressure methanol supply device includes:
methanol flows out of the methanol storage bin 220 and enters the methanol daily oil tank 230, wherein the methanol flows through the circulating pump group 251 and the first filter component 241 and enters the methanol daily oil tank 230;
methanol flows out of the methanol domestic oil tank 230 and is pressurized to a first preset pressure (10 bar) through the second filter assembly 242 of the filter unit and the low pressure supply pump unit 252 of the pump unit;
the methanol pressurized to a preset low pressure passes through the fuel valve unit 260 to make the flow rate and the flow quantity reach the preset flow rate and the second preset pressure (600 bar) is pressurized through the third filter assembly 243 of the filter unit and the high pressure supply pump unit 253 of the pump unit;
the methanol pressurized to a preset high pressure is cooled by the cooler 280 and then enters the main compartment 100.
In the case of pressure regulation of methanol, the regulation of the methanol pressure can be achieved by regulating the opening of the proportional regulating valve 2902 in the first proportional control module 291 provided at the output of the low pressure supply pump unit 252 and the second proportional control module 253 provided at the output of the high pressure supply pump unit 253: when the pressure displayed by the pressure sensor 2901 is too high, the opening degree of the proportional control valve 2902 is adjusted so that part of the methanol is returned to the methanol domestic oil tank 230 through the fuel valve return line 272 and the low-pressure supply return line 271 to reduce the pressure display value of the pressure sensor 2901.
The high-pressure methanol supply device provided in this embodiment cooperates and links with the start-stop of the ship host, and referring to fig. 4, the following steps are approximately performed:
firstly, judging the state of the load of the host computer by the running load signal of the diesel engine, and switching the fuel oil to the methanol mode only when the load is 20% -70% of the middle load. Before the high-pressure methanol supply device is operated, the methanol cooling system is started and circulated to a stable state, and in particular, the cooling system can be set to be operated for a period of time (for example, the operation time of 10-30 seconds is set by using a timer), and the pressure flow parameter of the cooling system fed back to the high-pressure methanol supply device is used for determining that the cooling system is circulated to the stable state.
Then, when the differential pressure of the second filter assembly is normal, starting the low-pressure supply pump group; the low pressure supply pump set is started and the fuel supply system reaches a ready state: when the low pressure supply pump unit continues to operate for a period of time, the pressure value monitored by the pressure sensor of the first proportional control assembly reaches a first preset pressure (10 bar), and then waits for a period of time (for example, 5-10 seconds). Then, when the differential pressure of the third filter assembly is normal, starting the high-pressure supply pump set, and waiting for a period of time (for example, 5-10 seconds); and when the pressure value monitored by the pressure sensor of the second proportion control assembly reaches a second preset pressure (600 bar), the temperature monitored by the temperature sensor TT reaches 36 ℃, and the pressure value is stably maintained, starting the control unit.
Then, when the pressure difference of the fourth filter assembly is normal, the pressure of the oil pipeline to be sealed reaches 700bar, the pressure of the oil pipeline is controlled to reach 400bar, the oil pipeline is waited for a period of time (for example, 5-10 seconds) and stabilized, and the host starts to operate after the pressure and the temperature of the methanol inlet reach the requirements and are stabilized.
Finally, the high-pressure methanol supply device controls to stop the low-pressure supply pump group and the high-pressure supply pump group, then controls the fuel valve unit, the inert gas generator and the like to blow off residual methanol in each pipeline, each device and the main engine room body by using inert gas after waiting for a period of time (the settable range is 15-20 seconds), and the fuel and inert gas mixture is collected in the methanol discharge cabinet, so that the inerting of the fuel supply system is finished; the methanol cooling water system was stopped.
In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, so that the same similar parts of each embodiment are referred to each other.
The fuel supply system and method of the marine diesel engine provided in the embodiment include: a main nacelle provided with a diesel engine; the high-pressure methanol supply device is used for supplying high-pressure methanol to the main engine room so as to supply power in cooperation with the diesel engine; the high-pressure methanol supply device comprises a methanol filling station, a methanol storage bin, a methanol daily oil tank, a filter unit, a pump unit, a fuel valve unit, a return pipeline and a cooler, which are connected through pipelines in sequence; the methanol filling station is used for filling methanol into the methanol storage bin; the methanol storage bin is used for storing methanol; the methanol daily oil tank is used for temporarily storing methanol to be used and purifying the methanol which flows back; the filter unit is used for filtering methanol; the pump unit is used for pressurizing methanol; the fuel valve unit is used for controlling the flow speed and the flow quantity of the methanol; the reflux pipeline is used for refluxing redundant methanol to the methanol daily oil tank; the cooler is used for cooling the methanol. The filter unit and the pump unit are used for filtering and pressurizing the methanol, so that the methanol can reach the high pressure methanol required by the medium-speed diesel engine, and the matching degree of the methanol supply system and various ships is enlarged; the flow speed and the flow quantity of the methanol can be effectively controlled through the fuel valve unit, so that the control of the running state of the main engine room is facilitated; the use efficiency of the methanol can be improved through the return pipeline, and the energy waste is reduced. Solves the problem that the existing low-pressure methanol supply system cannot be applied to all ships.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (14)
1. A fuel supply system for a marine diesel engine, comprising:
a main nacelle provided with a diesel engine;
the high-pressure methanol supply device is used for supplying high-pressure methanol to the main engine room so as to supply power in cooperation with the diesel engine; the high-pressure methanol supply device comprises a methanol filling station, a methanol storage bin, a methanol daily oil tank, a filter unit, a pump unit, a fuel valve unit, a return pipeline and a cooler, which are connected through pipelines in sequence; the methanol filling station is used for filling methanol into the methanol storage bin; the methanol storage bin is used for storing methanol; the methanol daily oil tank is used for temporarily storing methanol to be used and purifying the methanol which flows back; the filter unit is used for filtering methanol; the pump unit is used for pressurizing methanol; the fuel valve unit is used for controlling the flow speed and the flow quantity of the methanol; the reflux pipeline is used for refluxing redundant methanol to the methanol daily oil tank; the cooler is used for cooling the methanol.
2. The fuel supply system of a marine diesel engine according to claim 1, wherein a pressure breathing valve and an inert gas supply valve are respectively provided at the top of the methanol storage bin and the top of the methanol day tank; the pressure breather valve is used for controlling the internal pressure of the methanol storage bin and the internal pressure of the methanol daily oil tank; the inert gas supply valve is used for enabling the upper space inside the methanol storage bin and the methanol daily oil tank to be filled with inert gas.
3. The fuel supply system of a marine diesel engine according to claim 1, wherein a partition is provided inside the methanol commodity tank to divide the methanol commodity tank inside into a first section and a second section, the top of which is communicated; the first interval is provided with an output pipeline; the bottoms of the first interval and the second interval are respectively provided with a discharge valve, and the discharge valves are used for discharging impurities precipitated at the bottoms of the first interval and the second interval; the top of the first section and the top of the second section are respectively connected with the return pipeline.
4. A fuel supply system for a marine diesel engine as claimed in claim 3, wherein the return line comprises a main machine return line, a fuel valve return line and a low pressure supply return line; the host oil return pipeline is used for returning redundant methanol in the host cabin to the second interval; the fuel valve oil return pipeline is used for returning redundant methanol at the fuel valve unit to the first section; the low-pressure supply and return pipeline is used for returning redundant methanol at the output pipeline of the methanol daily oil tank to the first section.
5. The marine diesel fuel supply system of claim 1, wherein the filter unit comprises a first filter assembly, a second filter assembly, and a third filter assembly; the first filter component is arranged on a pipeline between the methanol storage bin and the methanol daily oil tank; the second filter component is arranged on an output pipeline of the methanol daily oil tank; the third filter assembly is arranged on an input pipeline of the main engine room.
6. The marine diesel fuel delivery system of claim 5, wherein the second filter assembly and the third filter assembly each comprise two parallel filters that operate alternately.
7. The fuel supply system of a marine diesel engine according to claim 1, wherein the pump unit comprises a circulation pump unit, a low pressure supply pump unit, and a high pressure supply pump unit; the circulating pump set is arranged on a pipeline between the methanol storage bin and the methanol daily oil tank so as to convey the methanol in the methanol storage bin to the methanol daily oil tank; the low-pressure supply pump set is arranged on an output pipeline of the methanol daily oil tank so as to adjust the pressure of the methanol output by the methanol daily oil tank to a first preset pressure; the high-pressure supply pump set is arranged on an input pipeline of the main engine room so as to adjust the pressure of the methanol to be fed into the main engine room to a second preset pressure; the first preset pressure is less than the second preset pressure.
8. The marine diesel fuel supply system of claim 7, wherein the circulation pump stack, the low pressure supply pump stack, and the high pressure supply pump stack each comprise two parallel pumps, the two parallel pumps operating alternately.
9. The marine diesel fuel supply system of claim 1, wherein the high pressure methanol supply device further comprises a proportional control unit comprising a first proportional control assembly provided at an output of the low pressure supply pump stack and a second proportional control assembly provided at an output of the high pressure supply pump stack; the first proportion control component and the second proportion control component comprise a pressure sensor and a proportion regulating valve, the pressure sensor is used for monitoring the pressure of the methanol output by the output end of the low-pressure supply pump set and the pressure of the methanol output by the output end of the high-pressure supply pump set, and the proportion regulating valve is used for regulating the flow of the methanol at the positions of the low-pressure supply pump set and the high-pressure supply pump set according to the pressure monitored by the pressure sensor.
10. The marine diesel fuel delivery system of claim 1, further comprising a purge device comprising an inert gas generator and a methanol bleed tank; the inert gas generator is used for providing inert gas for the filter unit and the diesel engine to blow off residual methanol; the methanol discharging cabinet is used for collecting the blown-off methanol and the superfluous methanol in the pipeline.
11. The marine diesel fuel delivery system of claim 1, further comprising an oil return device and a ventilation device; the oil return device is used for shunting the redundant methanol in the main engine cabin and then returning the methanol to the diesel engine and flowing into the return pipeline; the ventilation device is used for monitoring the methanol leakage state of the main engine room and ventilating the main engine room.
12. A fuel supply method for a marine diesel engine, applied to the fuel supply system for a marine diesel engine according to any one of claims 1 to 11, characterized by comprising:
acquiring the working condition of a main engine room;
starting a high-pressure methanol supply device according to the working condition of the main engine room so as to provide methanol for the main engine room;
the operation of the main cabin and the high-pressure methanol supply device is controlled according to the operation state of the main cabin.
13. The method of fueling a marine diesel engine as set forth in claim 12 wherein said method of enabling a high pressure methanol supply device to provide methanol to a main engine compartment based on operating conditions of the main engine compartment comprises:
when the working condition load of the main engine room is 20% -70%, the fuel oil energy supply mode is switched to the methanol energy supply mode;
in the methanol power mode, the high pressure methanol supply device supplies methanol to the main compartment.
14. The method of fueling a marine diesel engine as set forth in claim 13 wherein said method of providing methanol to a main compartment by a high pressure methanol supply device in a methanol powered mode comprises:
the methanol flows out from the methanol storage bin and enters the methanol daily oil tank;
methanol flows out of the methanol daily oil tank and is pressurized to a first preset pressure through a second filter component of the filter unit and a low-pressure supply pump group of the pump group unit;
the methanol pressurized to the preset low pressure passes through the fuel valve unit to enable the flow rate and the flow quantity to reach the preset flow rate and the second preset pressure is pressurized through the third filter component of the filter unit and the high-pressure supply pump unit of the pump unit;
the methanol pressurized to a preset high pressure is cooled by a cooler and then enters the main cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311320706.1A CN117128115A (en) | 2023-10-12 | 2023-10-12 | Fuel supply system and method for marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311320706.1A CN117128115A (en) | 2023-10-12 | 2023-10-12 | Fuel supply system and method for marine diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117128115A true CN117128115A (en) | 2023-11-28 |
Family
ID=88862970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311320706.1A Pending CN117128115A (en) | 2023-10-12 | 2023-10-12 | Fuel supply system and method for marine diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117128115A (en) |
-
2023
- 2023-10-12 CN CN202311320706.1A patent/CN117128115A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7463616B2 (en) | Marine liquid ammonia fuel supply and fuel recycling system | |
| CN101479150B (en) | Fuel system for gas driven vessel | |
| CN104265512A (en) | High-pressure/low-pressure gas supply system of ship power plant | |
| CN101520128B (en) | Movable type method and device for supplying liquid phase natural gas and gas phase natural gas | |
| CN104781532B (en) | Liquefaction gas processing system and liquefied gas processing method on ship | |
| CN113202660A (en) | Fuel supply system of single ammonia fuel marine diesel engine | |
| KR101563024B1 (en) | Natural gas supply method and apparatus | |
| CN101074760B (en) | Method and apparatus for supplying natural gas to gas demand sides | |
| WO2021008619A1 (en) | Oil-tanker gas supply system using two fuels, and oil tanker | |
| CN105683039A (en) | Fuel gas supply system for liquid gas transportation vessel | |
| CN204060975U (en) | A kind of high voltage/low voltage fuel gas supply system of Ship Power Equipment | |
| CN114320686B (en) | Marine methanol fuel supply method | |
| CN113047996A (en) | Methanol fuel dual-fuel supply system | |
| CN210083520U (en) | Dual-fuel transport ship with high safety performance | |
| CN114458444A (en) | Ship liquid ammonia supply system and ammonia fuel power ship | |
| CN104791142A (en) | Fuel supply system and method for marine engine | |
| RU2696145C1 (en) | Method and device for treating evaporated gas for feeding at least to an engine | |
| CN114320688A (en) | Marine methanol fuel supply system | |
| JP2022183044A (en) | Large two-stroke uniflow scavenged turbocharged internal combustion engine with ammonia absorption system | |
| CN220890362U (en) | Fuel supply system of marine diesel engine | |
| CN117128115A (en) | Fuel supply system and method for marine diesel engine | |
| CN102095071B (en) | Method and device for supplying multifunctional mobile liquid-phase natural gas and gas-phase natural gas | |
| CN217735634U (en) | Methanol fuel supply system for ship | |
| CN217950524U (en) | Fuel supply system for ship | |
| CN112811389A (en) | Movable intensive type marine instant hydrogen production and hydrogenation integrated system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |