CN114635815B - Methanol fuel supply system and control method thereof - Google Patents
Methanol fuel supply system and control method thereof Download PDFInfo
- Publication number
- CN114635815B CN114635815B CN202210348019.XA CN202210348019A CN114635815B CN 114635815 B CN114635815 B CN 114635815B CN 202210348019 A CN202210348019 A CN 202210348019A CN 114635815 B CN114635815 B CN 114635815B
- Authority
- CN
- China
- Prior art keywords
- fuel
- pipeline
- methanol
- host
- pressure
- 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.)
- Active
Links
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 513
- 239000000446 fuel Substances 0.000 title claims abstract description 214
- 238000000034 method Methods 0.000 title claims description 23
- 239000002828 fuel tank Substances 0.000 claims abstract description 83
- 238000002156 mixing Methods 0.000 claims abstract description 78
- 238000011084 recovery Methods 0.000 claims abstract description 30
- 239000011261 inert gas Substances 0.000 claims abstract description 20
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 96
- 239000007788 liquid Substances 0.000 claims description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 64
- 229910052757 nitrogen Inorganic materials 0.000 claims description 48
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 238000002485 combustion reaction Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 14
- 238000009423 ventilation Methods 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 11
- 238000011068 loading method Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000010763 heavy fuel oil Substances 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 230000002596 correlated effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 229960001948 caffeine Drugs 0.000 claims 1
- RYYVLZVUVIJVGH-UHFFFAOYSA-N trimethylxanthine Natural products CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 claims 1
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 14
- 230000001276 controlling effect Effects 0.000 description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- 238000011049 filling Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000013505 freshwater Substances 0.000 description 5
- 238000005192 partition Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000003949 liquefied natural gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- AEDZKIACDBYJLQ-UHFFFAOYSA-N ethane-1,2-diol;hydrate Chemical compound O.OCCO AEDZKIACDBYJLQ-UHFFFAOYSA-N 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000009288 screen filtration Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/0227—Control aspects; Arrangement of sensors; Diagnostics; Actuators
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/025—Adding water
-
- 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
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
-
- 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
- F02M37/20—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 characterised by means for preventing vapour lock
-
- 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 discloses a methanol fuel supply system, which comprises a fuel tank, a first fuel pipeline, a mixing tank, a second fuel pipeline, a host and a fuel recovery pipeline which are sequentially connected, wherein the tail end of the fuel recovery pipeline is connected with the fuel tank; the first fuel pipeline is used for carrying out first-stage temperature rise and pressure rise on the methanol in the fuel tank; the second fuel pipeline is used for carrying out second-stage temperature rise and pressure rise on the methanol in the mixing tank; the fuel recovery pipeline is used for recovering methanol in a pipeline to the fuel tank so as to realize recovery and reutilization of fuel; the fuel tank, the mixing tank and the second fuel line are also provided with inert gas lines for inerting the lines. The methanol fuel supply system is provided with the mixing tank, can buffer the methanol fuel, and can eliminate air resistance caused by accumulation and evaporation of the fuel during transportation. Meanwhile, the fuel system has more comprehensive functions, and improves the safety and stability of the operation of the system.
Description
Technical Field
The invention relates to the field of ship power systems, in particular to a methanol fuel supply system and a control method thereof.
Background
The international maritime organization passes the preliminary strategy of ship greenhouse gas emission reduction in 2018, and provides the prospect of realizing zero emission of the international maritime greenhouse gas in this century, the host (5) of the large-scale ship starts to increase successively and reform from traditional diesel oil and heavy oil to use various clean low-carbon energy sources as fuels, and the main energy sources currently used and developed are LNG and LPG (liquefied Natural gas) but still are fossil energy sources and can only be used as an intermediate transition carbon reduction scheme, and methanol is a low-carbon energy source at this moment to come out as a more ideal fuel which further accords with zero emission.
Although the traditional technology for preparing the methanol by coal is mature, compared with the conventional diesel fuel, the carbon reduction is only 10% -15%, the effect is not obvious, but from the full life cycle, the green methanol prepared by biomass/direct air carbon capture can be considered as 100% carbon reduction.
The methanol is liquid at normal temperature, is easy to store and low in supply pressure, is a low-cost alternative fuel solution, but the methanol has high vaporization latent heat and a flash point of 12 ℃, so that the low-temperature starting performance of the methanol fuel is poor, and corresponding heating measures are needed in winter; when the air temperature is high, air resistance is easy to form in the oil way, so that oil supply is not smooth; methanol is toxic and inflammable to human body, and the steam of methanol can form explosive mixture with air; therefore, when methanol is used as a fuel, the above problems need to be overcome. The patent discloses a control method of a methanol fuel supply system aiming at the characteristics of methanol fuel.
Disclosure of Invention
The present invention is directed to overcoming at least one of the above-mentioned drawbacks of the prior art, and providing a methanol fuel supply system including a fuel tank, a first fuel line, a mixing tank, a second fuel line, a host, and a fuel recovery line connected in sequence, the end of the fuel recovery line being connected to the fuel tank; the first fuel pipeline is used for carrying out first-stage temperature rise and pressure rise on the methanol in the fuel tank; the second fuel pipeline is used for carrying out second-stage temperature rise and pressure rise on the methanol in the mixing tank; the fuel recovery pipeline is used for recovering methanol in a pipeline to the fuel tank so as to realize recovery and reutilization of fuel; the fuel tank, the mixing tank and the second fuel line are also provided with inert gas lines for inerting the lines.
The fuel tank is used for containing methanol; the fuel tank is provided with an inert gas pipeline, namely a first nitrogen pipe and a first high-speed ventilation head, and is provided with two backflow pipe orifices, a filling pipe, a liquid outlet pipe and two residue discharging ports, the inside of the fuel tank is divided into two parts by a partition plate, the right side of the fuel tank is provided with the two backflow pipe orifices and the filling pipe, a medium for backflow and filling enters the right side of the fuel tank from the backflow pipe or the filling pipe respectively, and is deposited, impurities are deposited on the tank bottom by gravity, methanol overflows the partition plate to enter the left side, and the methanol is supplied through the pipeline. The left and right sides of the partition plate are respectively provided with a residue placing port at the bottom of the fuel tank, and the fuel tank is convenient to empty when residues are placed.
Methanol is stored in the fuel tank in the form of atmospheric liquid under the tank, nitrogen is filled into the upper part of the interior of the fuel tank through a first nitrogen pipe, when the fuel discharge amount is larger than the inlet amount, the liquid level is reduced, the air pressure in the fuel tank is reduced, the first nitrogen pipe is filled with nitrogen, the normal pressure in the fuel tank is maintained, when the fuel inlet amount is larger than the discharge amount, the liquid level is increased, the air pressure in the fuel tank is increased, and the nitrogen above the fuel tank is discharged through the first nitrogen pipe, so that the normal pressure in the fuel tank is maintained. In emergency, the vacuum degree of the negative pressure in the fuel tank reaches a set value, the vacuum valve in the first high-speed ventilation head is opened, and external air enters to maintain normal pressure in the fuel tank; if the positive pressure in the fuel tank reaches a set value, a pressure valve in the first high-speed ventilation head is opened to release air and pressure so as to ensure that the fuel tank is always in a safe pressure bearing range. Through the mode, the lower layer of the fuel tank is always methanol liquid, the upper layer is in a nitrogen inerting state, and the pressure of the fuel tank is always in a normal working safety state by jointly adjusting the pressure through the first nitrogen pipe and the first high-speed ventilation head.
The upper end of the mixing tank is provided with a second nitrogen pipe, a first safety valve and a first pressure sensor; the lower side is provided with a first low-level liquid level switch; a first temperature sensor and a first high-level liquid level switch are sequentially arranged on the upper side of the first low-level liquid level switch; one side of the mixing tank is connected with a first fuel pipeline; the bottom is connected with a second fuel pipeline; the other side is connected with a third bypass pipeline. The mixing tank is a pressure vessel and the working pressure is 5bar + -0.5 bar.
The whole methanol fuel supply system is remotely controlled by a control system; comprises a first control panel and a second control panel; and the system control can be performed in different areas, and the system is flexibly arranged.
Further, the methanol fuel supply system further comprises a water adding pipeline, wherein the water adding pipeline is arranged on the second fuel pipeline and used for mixing with methanol in the second fuel pipeline in proportion and then entering the host for combustion.
The water adding pipeline comprises a water source, a water pump, a second flowmeter, a second proportional valve and a fourth bypass pipe. The second flowmeter is a mass flowmeter, the second proportional valve is an opening regulating valve, the flow and pressure of the outlet of the water pump can be regulated, the fourth bypass pipe is provided with the second proportional valve, the reflux quantity can be regulated, the pressure and flow of the water at the outlet of the water pump can be regulated by matching the second proportional valve with the fourth bypass pipe, and the water temperature can be regulated to 30-35 ℃ by a temperature regulating device arranged on the water adding pipeline.
The specific method is as follows: the flow of water is monitored through a second flow meter, the flow is connected into a first control panel, the second flow meter is connected into a second control panel for monitoring, the first control panel and the second control panel are mutually connected in a network for regulation and control, when the load of a host is 100%, the mass flow of the second flow meter is controlled to be 30% -40% of the mass flow of the second flow meter, and when the load of the host is 20% -25%, the mass flow of the second flow meter is controlled to be 70% -80% of the mass flow of the second flow meter, so that the water and the methanol enter the host for combustion after being mixed. With the load change of the host, the corresponding pumps and valves are controlled by the first control panel and the second control panel, and the water and the methanol can be mixed and supplied to the host according to any specified proportion.
The two stop relief valves are arranged on the water adding pipe and are remote control valves, the two stop relief valves are controlled by the first control panel, when the emergency shutdown of the accident main engine occurs, the valves are all closed, the association of water and the second fuel pipe is cut off, a relief pipe line communication relief cabinet is further arranged between the two stop relief valves, and the relief pipe line is also provided with a relief valve for controlling the medium in the relief pipe line to be released into the relief cabinet.
Further, the first fuel pipeline comprises a first filter, a first pressure pump and a first heat exchanger which are communicated in sequence; the filtering precision of the filter screen of the first filter is 20-50 um; the first pressure pump and the first heat exchanger are used for heating and boosting in the first stage; preferably, the pressure of the first pressure pump is 5 bar+/-0.5 bar; the temperature of the first heat exchanger is 10-20 ℃.
The first fuel pipeline mainly heats and boosts the temperature of the fuel in the first stage, and the methanol can be buffered by designing the mixing tank, so that air resistance caused by accumulation and evaporation of the fuel during transportation can be eliminated. The first filter is a coarse filter, and one or more filters connected in parallel can be designed, which are all within the protection scope of the invention; by providing a differential pressure gauge at the inlet and outlet of the first filter, when the differential pressure exceeds a set threshold, the filter is judged to be blocked, namely, the filter is switched to be used in parallel, and the blocked filter is cleaned.
Further, the first fuel line further comprises a first proportional valve arranged between the first pressure pump and the first heat exchanger for adjusting the flow rate of methanol; and a first flowmeter for calculating the flow of the methanol is further arranged between the first heat exchanger and the mixing tank.
The first proportional valve can adjust the flow of methanol in the pipeline through remote control; the first flowmeter sends detection data to the control end, and the control end is utilized to adjust the size of the first proportional valve so as to realize intelligent adjustment of flow.
Further, the second fuel pipeline comprises a second pressure pump, a second heat exchanger and a second filter which are communicated in sequence; the second pressure pump and the second heat exchanger are used for heating and boosting in the second stage; the pressure of the second pressure pump is 12 bar+/-0.5 bar; the temperature of the second heat exchanger is 30-40 ℃; the filtering precision of the filter screen of the second filter is 10-20 um.
The second fuel pipeline mainly carries out the temperature rise and the pressure rise of the second stage on the fuel, the second filter is adopted for fine filtration, and one or more parallel connection can be designed as well, which are all within the protection scope of the invention; and when the differential pressure exceeds a set threshold value, the filter is judged to be blocked, namely, the filter is switched to be used in parallel, and the blocked filter is cleaned.
Further, the second fuel line further includes electrical tracing disposed between the second filter and the host; and the electric tracing is selectively started to heat the methanol before entering the host.
The electric tracing is mainly started in a low-temperature environment; if the temperature of the methanol in the second fuel pipeline is reduced to a certain threshold value in cold outdoor weather, electric tracing is started, and the pipeline is heated through a tracing belt wound outside the second fuel pipeline, so that the temperature of the methanol fuel in the pipeline reaches a specified threshold value and then enters the engine room for a host machine to use.
Further, the methanol fuel supply system further comprises a bleed line; the drainage pipeline comprises a drainage cabinet, a first liquid inlet main pipe communicated with the drainage cabinet, a second liquid inlet main pipe communicated with the drainage cabinet and a plurality of liquid inlet branch pipes; one end of each liquid inlet branch pipe is respectively connected with the first fuel pipeline, the mixing tank, the second fuel pipeline and the fuel recovery pipeline, and the other end of each liquid inlet branch pipe is respectively connected with the first liquid inlet main pipe; one end of the second liquid inlet main pipe is connected with the bottom of the fuel tank; the other end is connected with a discharge cabinet.
The bleeder cabinet is arranged at the lowest end of the whole methanol fuel supply system; the leakage is realized through a plurality of pipelines; the design of the pipeline can realize the discharge of the mixed liquid of methanol and water in the fuel tank, the first fuel pipeline, the mixing tank, the second fuel pipeline and the host; the device at least comprises seven liquid inlet branch pipes, wherein liquid inlets are respectively arranged at the lower sides of the first filter, the first heat exchanger, the mixing tank, the second filter and the second heat exchanger, and between the second heat exchanger and electric tracing; the liquid inlet branch pipes are converged to form a first liquid inlet main pipe, and finally flow into the discharge cabinet. The fuel tank is divided into two parts, so that the bottoms of the two parts are respectively provided with a discharge port. And is communicated with the discharge cabinet through a second liquid inlet main pipe. In addition, a three-way valve is arranged on the fuel recovery pipeline; the bottom is connected with a discharge cabinet.
Further, the methanol fuel supply system also comprises a plurality of bypass pipeline assemblies and a proportional valve arranged on the bypass pipeline assemblies; the bypass conduit assembly includes a first bypass conduit, a second bypass conduit, and a third bypass conduit; one end of the first bypass pipeline is connected with the second fuel pipeline, and the other end of the first bypass pipeline is connected with the mixing tank; one end of the second bypass pipeline is connected with the first fuel pipeline, and the other end of the second bypass pipeline is connected with the fuel tank; one end of the third bypass pipeline is connected with the second fuel pipeline, and the other end of the third bypass pipeline is connected with the fuel tank.
If the methanol is supplied and required, the first pressure sensor displays overpressure, the third proportional valve is opened to adjust the opening degree, the methanol flows back through the first bypass pipeline and enters the mixing tank, and the first pressure sensor displays that the pressure is restored to 12 bar+/-0.5 bar. If the second pressure pump is excessively pressurized, the third proportional valve can be opened to adjust the opening degree, and the methanol enters the mixing tank through the first bypass pipeline so as to reach the condition that the first pressure sensor displays 12bar plus or minus 0.5bar.
The first pressure sensor and the first temperature sensor are used for monitoring the pressure and the temperature in the mixing tank, when the numerical value deviates from the set threshold value, signals are transmitted to the second control panel, and the second control panel controls the first pressure pump and the first heat exchanger to correspondingly adjust so that the pressure and the temperature meet the set threshold value requirement. The pressure and flow rate of the first pressure pump outlet can be regulated by regulating the opening of the proportional valve on the second bypass pipe and the valve between the first pressure pump and the first heat exchanger, and allowing methanol at the first pressure pump outlet to flow back to the fuel tank 201 in proportion through the proportional valve on the second bypass pipe.
The mixing tank can collect methanol liquid and evaporating gas, has the functions of buffering and eliminating air resistance in a pipeline, and the methanol liquid is positioned at the lower layer in the tank, and the mixture of the evaporating gas and nitrogen is positioned at the upper layer in the mixing tank. When the first low-level liquid level switch alarms, the second control panel controls the second pressure pump to reduce the displacement; when the first high-level liquid level switch alarms, the second control panel controls the second pressure pump to increase the displacement. The second nitrogen pipe and the first pressure sensor signal are controlled by a second control panel in a correlated way, the internal pressure of the mixing tank is regulated to be in a specified threshold range through air inlet and air return, and inerting blowing is performed when maintenance is needed. And when the pressure in the mixing tank exceeds the working pressure and reaches a first safety valve set threshold, the first safety valve releases the overpressure.
The specific method is as follows: when the first low-level liquid level switch alarms, the second pressure pump is controlled by the second control panel to reduce the displacement, the liquid level in the mixing tank rises at the moment, the upper gas volume in the mixing tank becomes smaller to lead to the pressure rising, and the second nitrogen pipe provides exhaust to reduce the pressure until the first pressure sensor displays the pressure to return to the set working range. When the first high-level liquid level switch alarms, the second pressure pump is controlled by the second control panel to increase the discharge capacity, the liquid level in the mixing tank is reduced, the upper gas volume in the mixing tank is increased to cause the pressure reduction, and the second nitrogen pipe provides the air inlet supplementary pressure until the first pressure sensor displays the pressure to return to the set working range.
The invention also provides a control method of the methanol fuel supply system, which comprises the following steps:
s1: inerting of piping and host: inerting a pipeline and a host of a methanol fuel supply system by using inert gas;
s2: the first stage is to raise temperature and boost pressure: methanol enters a mixing tank after being heated and boosted in the first stage from a fuel tank;
s3: the second stage is to raise the temperature and pressure: methanol enters a host after being heated and boosted in the second stage by a mixing tank;
s4: judging whether the ventilation times of the host machine per hour is more than 30-45 times; and if the concentration of the methanol evaporation gas in the host is lower than 18% LEL, the step S5 is entered; if not, the host is not started;
s5: starting a host machine, loading and running until the fuel is burnt;
s6: closing the host, and cleaning the pipeline by using inert gas;
s7: the methanol fuel supply system is vented and degassed.
According to the invention, the methanol is buffered in the mixing tank by raising the temperature and the pressure in a stepwise manner, so that the aggregation of methanol steam is avoided, and air resistance is formed; thereby improving the combustion efficiency of methanol. If either one of the two conditions in S4 is not satisfied or neither one is satisfied, there may be a risk of fuel leakage or a fan being damaged, and at this time, the host cannot be started normally. Preferably, the ventilation times of the main machine are between 30 and 45 times per hour, and the ventilation times are preferably more than 32 times; the higher the number of times, the greater the fan power required, possibly causing unnecessary losses; however, the exhaust condition is not satisfied, which may cause the accumulation of methanol vapor to form air lock, affecting the emission standard.
Further, in the step S5, the loading operation program is as follows:
a1: after the host is loaded to the first load degree for operation, quantitatively providing water with the mass flow rate of 70-80% of the methanol flow rate, and mixing the water with the methanol fuel for combustion;
a2: after the host is loaded to the second load degree for operation; quantitatively providing water with the mass flow rate of 30% -40% of the methanol flow rate, and mixing the water with the methanol fuel for combustion;
the first load degree is smaller than the second load degree;
preferably: the first load degree is 20% -25%; the second load degree is 90% -100%.
Specifically, the host is started to carry out gradient loading load, and the methanol fuel is quantitatively provided for the host to run at 20% -25% of load by controlling the running of the pump, the opening of the valve, the reflux of the bypass pipe and the monitoring feedback of the flowmeter through the cooperation control of a plurality of proportional valves, the flowmeter and the pressure pump on the pipeline. Further controlling the proportional valve, the flowmeter, the bypass pipe and the pump to control in a matching way, and quantitatively providing fresh water with the mass flow of 70-80% of the methanol flow into the host machine to perform mixed combustion with the methanol fuel by controlling the operation of the pump, the opening of the valve, the backflow of the bypass pipe and the monitoring feedback of the flowmeter.
The method comprises the steps of controlling pressure pump operation, valve opening, bypass pipe backflow and flowmeter monitoring feedback, quantitatively providing methanol fuel for a host machine to operate at 100% load, simultaneously utilizing a proportional valve, a flowmeter, a bypass pipe and a pump to cooperatively control, and quantitatively providing water with mass flow of 30% -40% of methanol flow for entering the host machine to perform mixed combustion with the methanol fuel by controlling pump operation, valve opening, bypass pipe backflow and flowmeter monitoring feedback.
Further, in the step S6, the procedure of cleaning the pipe with inert gas is as follows:
b1: judging the fuel of the host; if 100% of the host fuel is provided for the fuel tank, the step B2 is entered; if the host fuel is supplied by the fuel tank and the water supply pipeline together, the step B3 is entered;
b2: starting an inert gas pipeline, and blowing methanol in the pipeline into a fuel tank to perform gas-liquid separation;
b3: and (3) discharging the mixed solution into a discharge cabinet, and executing the step B2.
After the host machine is stopped, the third nitrogen pipe is utilized for blowing off, and the two conditions are divided into: first case: when 100% of the host fuel is provided for the fuel tank, the purity of the methanol in the host is higher at this time; under the condition, the emission can only reach IMO Tier2 standard, only nitrogen and methanol liquid mixture in the first fuel pipeline, the second fuel pipeline and the host is blown off, and the mixture is discharged to the fuel tank for gas-liquid separation through the first fuel pipeline, the inside of the host, the second fuel pipeline and the fuel recovery pipeline. Second case: when the fuel in the host is provided by the fuel tank and the water adding pipeline, the host is a mixed solution of methanol and water, at the moment, the water-doped methanol is firstly discharged to the discharge cabinet, and then the step of the first condition is executed, so that the water-doped methanol is prevented from directly returning to the fuel tank.
Further, in the step S7, the step of bleeding and degassing includes: the residual fuel and nitrogen in the evacuation line and the host are vented to a bleed tank.
Further, in the step S1, the inerting time is t1 seconds, and the calculation formula of t1 is:
wherein Q1 is the volume of an external pipeline of the main engine along the way from an air source to a discharge port, Q2 is the volume of the main engine which needs to be blown off, VN2 is the nitrogen blowing speed, and n is the redundancy factor.
The inert gas is nitrogen, a nitrogen inerting pipeline and a host are utilized, and a third nitrogen pipe is arranged at the liquid inlet end of the intersection point of the water adding pipeline and the second fuel pipeline; nitrogen enters from a third nitrogen pipe, the second fuel pipeline and air in the host are blown off, the three-way valve is opened to communicate the fuel recovery pipeline, the nitrogen blown off air is discharged to an open safety area from the fuel recovery pipeline through the opening valve, the valve of the fuel recovery pipeline communicated with the fuel tank is kept closed, and the inerting blowing lasts for a period of time t 1 Second, time t 1 Calculated from volume and purge rate.
The parameters in the above formula can be designed into different parameters according to the requirement, and Q is taken 1 ＝0.9m 3 ,Q 2 ＝0.3m 3 ,V N2 ＝0.1m 3 S, n=3; substituting formula to calculate t 1 =36 seconds. The above values are exemplary, not limiting, and are intended to be within the scope of the present invention by substituting different values. The first control panel receives time t 1 The end signal, i.e. the inerting is judged to be completed, the air in the pipe is replaced by nitrogen entirely, and the step S2 can be continued.
Further, in the step S2, the pressure after the temperature rise and the pressure boost in the first stage is 5bar±0.5bar; the temperature after the temperature rise and the pressure rise in the first stage is 10-20 ℃; in the step S3, the pressure after the temperature rise and the pressure boost in the second stage is 12 bar+/-0.5 bar; the temperature after the temperature rise and the pressure rise in the second stage is 30-40 ℃.
In the step S2, the first pressure pump is started, methanol is filtered by the first filter with the filtering precision of 20-50 um from the fuel tank, then is pressurized to 5 bar+/-0.5 bar by the first pressure pump, is heated by the first heat exchanger, and then is displayed as 12-13 ℃ by the second temperature sensor, and then enters the mixing tank. More specifically, the first heat exchanger is a plate heat exchanger adopting water glycol as a medium, the water glycol solution with the glycol concentration of 35 percent heats the methanol to 12-13 ℃, and the filtering precision of the first filter is 25-50 um. The normal working range of the pressure sensor is set to be 5bar plus or minus 0.5bar, the normal working range of the second temperature sensor is set to be 12-13 ℃, and the second temperature sensor is connected to a second control panel for real-time monitoring.
In the step S3, the second pressure pump is started, methanol is pressurized to 12 bar+/-0.5 bar from the mixing tank through the second pressure pump, more preferably, the methanol is heated to 30-35 ℃ through the second heat exchanger, impurities are filtered through the filter 114 (the filter screen has the filtering precision of 10-20um and can be further heated to a specified threshold through the electric tracing 210. Specifically, the methanol is pressurized through the second pressure pump, the second pressure sensor detects 12 bar+/-0.5 bar, the methanol is heated through the second heat exchanger, more preferably, the third temperature sensor detects 30-35 ℃ and then the methanol continues to advance into a cabin pipeline of the host machine.
Furthermore, the methanol fuel supply system provided by the invention is provided with the fuel supply unit skid, specifically, the first pressure pump, the second pressure pump, the third pressure pump on the first liquid inlet main pipe, the first fuel pipeline, part of the second fuel pipeline, the first filter, the second filter, the related valve, the first heat exchanger, the second heat exchanger, the first flowmeter, the third flowmeter, the mixing tank, the pressure sensor, the temperature sensor, the second control panel and the like are arranged on one skid in a concentrated manner, preassembled in advance, saves space, and is convenient for batch production, transportation, installation and control. The second control panel can monitor and control the first pressure pump, the second pressure pump, the third pressure pump on the first liquid inlet main pipe, the first filter, the second filter, related valves, flow meters, mixing tanks, pressure sensors, temperature sensors and the like.
Compared with the prior art, the invention has the beneficial effects that:
(1) The methanol fuel supply system is provided with the mixing tank, can buffer the methanol fuel, and can eliminate air resistance caused by accumulation and evaporation of the fuel during transportation. Meanwhile, the invention has the functions of gradient pressurization and heating processes, synchronous filtration, overpressure backflow pipelines, emergency shutdown release of the double stop valve groups and the like, so that the whole system has more comprehensive functions, the system is more stable, and the safety and stability of the system operation are improved.
(2) According to the invention, the fresh water adding pipeline is designed, the characteristic that the mixed combustion of the methanol and the water is more sufficient is utilized, the fresh water and the methanol are mixed in proportion and then enter the host for combustion, so that the emission of nitrogen oxides of the host is reduced, the emission standard of IMO Tier 3 is met, and the environment is protected and energy is saved.
(3) The invention designs a plurality of nitrogen pipes, can provide nitrogen for each pipeline, the host, the fuel tank and the mixing tank, and perform internal blowing, inerting, fuel recovery and inerting pressure regulation for the fuel tank and the mixing tank, so that the system is more convenient and quick to clean, the nitrogen is nontoxic, and the emission is safer. In addition, the invention provides a release collection function, and residual fuel in the pipeline and the host is collected back to the methanol release cabinet through the pneumatic diaphragm pump and natural release.
(4) The invention designs a double-wall pipe and a fan aiming at the host machine, has a flowmeter and a hydrocarbon gas detector, provides an explosion-proof ventilation function, provides two preposed safety conditions for starting the host machine, and ensures the stable operation of the host machine. And the methanol liquid inlet pipe and the fresh water supply pipe are both provided with double stop relief valves, so that the double stop valves are closed to cut off the supply in an emergency state, and emergency relief is carried out, and the two stop valves respectively flow back to the fuel tank and the relief cabinet.
(5) The invention can be made into a fuel supply unit skid, and the fuel pressurizing pump, the pipeline, the filter, the valve, the heat exchanger, the flowmeter, the mixing tank, the pressure sensor, the temperature sensor, the control panel and the like are arranged on one skid in a concentrated way, so that the invention is preassembled in advance, saves space, is convenient for batch production, transportation, installation and control, can be controlled in a combined way with an external control panel and the like, has more intelligent control and saves labor cost.
Drawings
FIG. 1 is a schematic diagram of the overall layout of a methanol fuel supply system according to the present invention.
FIG. 2 is a schematic diagram of another overall layout structure of the methanol fuel supply system of the present invention.
FIG. 3 is a schematic diagram of a first fuel line layout of the methanol fuel supply system of the present invention.
FIG. 4 is a schematic diagram of a second fuel line layout of the methanol fuel supply system of the present invention.
FIG. 5 is a schematic diagram of a control method of a methanol fuel supply system according to the present invention.
Detailed Description
The drawings in the embodiments are used for describing the technical scheme in the embodiments of the invention in more detail. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the methanol fuel supply system comprises a fuel tank 1, a first fuel pipeline 2, a mixing tank 3, a second fuel pipeline 4, a host machine 5 and a fuel recovery pipeline 6 which are sequentially connected, wherein the tail end of the fuel recovery pipeline 6 is connected with the fuel tank 1; the first fuel pipeline 2 is used for carrying out first-stage temperature rise and pressure rise on the methanol in the fuel tank 1; the second fuel pipeline 4 is used for carrying out second-stage temperature rise and pressure rise on the methanol in the mixing tank 3; the fuel recovery pipeline 6 is used for recovering methanol in a pipeline to the fuel tank 1 so as to realize the recovery and reutilization of fuel; the fuel tank 1, the mixing tank 3 and the second fuel line 4 are further provided with an inert gas line 7 for inerting the line.
The fuel tank 1 is used for containing methanol; as shown in fig. 2, the fuel tank 1 is provided with an inert gas line 7, namely a first nitrogen pipe 71, and a first high-speed ventilation head 101, and has two return nozzles 201, a filling pipe 202, a liquid outlet pipe 203 and two residue discharging ports 204, the inside of the fuel tank 1 is divided into two parts by a partition 11, two return nozzles 201 and a filling pipe 202 are provided on the right, and medium for return and filling enters the right of the fuel tank 1 from the return nozzles 201 or the filling pipe 202, respectively, and is precipitated, impurities are gravity-settled at the tank bottom, methanol is diffused through the partition 11 to the left, and is supplied through the line. The left and right baffle plates 11 are respectively provided with a residue placing port 204 at the bottom of the fuel tank 1, and the residue can be conveniently emptied when being placed.
The upper end of the mixing tank 3 is provided with a second nitrogen pipe 31, a first safety valve 32 and a first pressure sensor 33; the lower side is provided with a first low-level liquid level switch 34; a first temperature sensor 35 and a first high-level liquid level switch 36 are sequentially arranged on the upper side of the first low-level liquid level switch 34; one side of the mixing tank 3 is connected with a first fuel pipeline 2; the bottom is connected with a second fuel pipeline 4; the other side is connected to a third bypass conduit 303. The mixing tank 3 is a pressure vessel and operates at a pressure of 5bar + -0.5 bar.
Referring to fig. 1-2, the methanol fuel supply system further includes a water adding pipeline 8, where the water adding pipeline 8 is disposed on the second fuel pipeline 4 and is used for mixing with methanol in the second fuel pipeline 4 proportionally and then entering the host 5 for combustion.
The water adding pipeline 8 comprises a water source 81, a water pump 82, a second flowmeter 83, a second proportional valve 84 and a fourth bypass pipe 85. The second flowmeter 83 is a mass flowmeter, the second proportional valve 84 is an opening regulating valve, the flow and pressure of the outlet of the water pump 82 can be regulated, the fourth bypass pipe 85 is provided with the second proportional valve 84, the reflux amount can be regulated, the pressure and flow of the water of the outlet of the water pump 82 can be regulated by matching the second proportional valve 84 with the fourth bypass pipe 85, and the water temperature can be regulated to 30-35 ℃ by a temperature regulating device arranged on the water adding pipeline 8.
The flow of water is monitored through the second flow meter 83, the flow is connected to the first control panel 10, the second flow meter 83 is connected to the second control panel 20 for monitoring, the first control panel 10 and the second control panel 20 are mutually connected to be regulated and controlled, when the load of the host computer 5 is 100%, the mass flow of the second flow meter 83 is controlled to be 30% -40% of the mass flow of the first flow meter 25, and when the load of the host computer 5 is 20% -25%, the mass flow of the second flow meter 83 is controlled to be 70% -80% of the mass flow of the first flow meter 25, so that the water and the methanol enter the host computer 5 for combustion after being mixed. As the load of the host 5 changes, the corresponding pumps and valves are controlled by the first control panel 10 and the second control panel 20, and water and methanol can be mixed and supplied to the host 5 according to any specified proportion.
The water adding pipeline 8 is provided with a double-stop relief valve 86 which is a remote control valve and is controlled by the first control panel 10, when the accident main machine 5 is in emergency stop, the valves are all closed, the association of water and the second fuel pipeline 4 is cut off, a water draining pipeline 87 is further arranged between the double-stop relief valves 86 to be communicated with a relief cabinet 91, and the water draining pipeline 87 is also provided with a relief valve 88 for controlling the medium in the water draining pipeline 87 to be discharged into the relief cabinet 91.
As shown in fig. 2 and 3, the first fuel line 2 includes a first filter 21, a first pressure pump 22, and a first heat exchanger 23, which are sequentially connected; the filtering precision of the filter screen of the first filter 21 is 20-50 um; the first pressure pump 22 and the first heat exchanger 23 are used for heating and boosting in the first stage; the pressure of the first pressure pump 22 is 5bar + -0.5 bar; the temperature of the first heat exchanger 23 is 10-20 ℃.
As shown in fig. 3, the first fuel line 2 further includes a first proportional valve 24 for regulating the flow of methanol provided between the first pressure pump 22 and the first heat exchanger 23; a first flowmeter 25 for calculating the flow rate of methanol is further provided between the first heat exchanger 23 and the mixing tank 3.
As shown in fig. 4, the second fuel line 4 includes a second pressure pump 41, a second heat exchanger 42, and a second filter 43, which are sequentially connected; the second pressure pump 41 and the second heat exchanger 42 are used for the second stage temperature rise and pressure rise; the pressure of the second pressure pump 41 is 12bar + -0.5 bar; the temperature of the second heat exchanger 42 is 30-40 ℃; the filter screen of the second filter 43 has a filter accuracy of 10 to 20um.
As shown in fig. 4, the second fuel line 4 further includes an electric tracing 44 provided between the second filter 43 and the main unit 5; the electric tracing 44 is selectively activated to heat the methanol before it enters the host 5.
As shown in fig. 2, the methanol fuel supply system further includes a bleed line 9; the relief pipeline 9 comprises a relief cabinet 91, a first liquid inlet main pipe 92 communicated with the relief cabinet 91, a second liquid inlet main pipe 93 communicated with the relief cabinet 91 and a plurality of liquid inlet branch pipes 94; one end of each of the liquid inlet branch pipes 94 is respectively connected with the first fuel pipeline 2, the mixing tank 3, the second fuel pipeline 4 and the fuel recovery pipeline 6, and the other end is respectively connected with the first liquid inlet main pipe 92; one end of the second liquid inlet manifold 93 is connected to the bottom of the fuel tank 1; the other end is connected with a bleeder cabinet 91.
As shown in fig. 1, the methanol fuel supply system further comprises a plurality of bypass pipe assemblies and proportional valves arranged on the bypass pipe assemblies; the bypass duct assembly comprises a first bypass duct 301, a second bypass duct 302 and a third bypass duct 303; one end of the first bypass pipe 301 is connected with the second fuel pipeline 4, and the other end is connected with the mixing tank 3; one end of the second bypass pipe 302 is connected with the first fuel pipe 2, and the other end is connected with the fuel tank 1; one end of the third bypass pipe 303 is connected to the second fuel line 4, and the other end is connected to the fuel tank 1.
As shown in fig. 1, the methanol fuel supply system of the present invention has a fuel supply unit skid 100, specifically, the first pressure pump 22, the second pressure pump 41, the third pressure pump on the first liquid inlet manifold 92, the first fuel line 2, a part of the second fuel line 4, the first filter 21, the second filter 43, related valves, the first heat exchanger 23, the second heat exchanger 42, the first flowmeter 25, the third flowmeter, the mixing tank 3, the pressure sensor, the temperature sensor, the second control panel 20, and the like are integrally mounted on one skid, and preassembled in advance, thereby saving space and facilitating mass production, transportation, installation and operation. The second control panel 20 can monitor and control the first pressure pump 22, the second pressure pump 41, the third pressure pump on the first intake manifold 92, the first filter 21, the second filter 43, the associated valves, the flow meter, the mixing tank 3, the pressure sensor, the temperature sensor, etc.
As shown in fig. 1 to 4, if the supply of methanol exceeds the demand, the first pressure sensor 33 displays overpressure, the third proportional valve 401 is opened to adjust the opening degree, the methanol flows back through the first bypass pipe 301 to the mixing tank 3, and the first pressure sensor 33 displays that the pressure is restored to 12bar±0.5bar. If the second pressure pump 41 is excessively pressurized, the third proportional valve 401 can be opened to adjust the opening degree, and the methanol enters the mixing tank 3 through the first bypass pipe 301, so that the first pressure sensor 33 displays 12bar + -0.5 bar.
The first pressure sensor 33 and the first temperature sensor 35 are used for monitoring the pressure and the temperature in the mixing tank 3, when the values deviate from the set threshold values, signals are transmitted to the second control panel 20, and the second control panel 20 controls the first pressure pump 22 and the first heat exchanger 23 to correspondingly adjust so that the pressure and the temperature meet the set threshold values. The pressure and flow rate at the outlet of the first pressure pump 22 can be regulated by regulating the opening of the proportional valve in the second bypass line 302 and the valves between the first pressure pump 22 and the first heat exchanger 23, and allowing the methanol at the outlet of the first pressure pump 22 to flow back to the fuel tank 1 in proportion through the proportional valve in the second bypass line 302.
When the first low level liquid level switch 34 alarms, the second pressure pump 41 is controlled by the second control panel 20 to reduce the displacement, at the moment, the liquid level in the mixing tank 3 rises, the upper layer gas volume in the mixing tank 3 becomes smaller to cause the pressure to rise, and the second nitrogen pipe 31 provides exhaust gas to reduce the pressure until the first pressure sensor 33 displays that the pressure returns to the set working range. When the first high-level liquid level switch 36 alarms, the second control panel 20 controls the second pressure pump 41 to increase the displacement, at the moment, the liquid level in the mixing tank 3 is reduced, the upper-layer gas volume in the mixing tank 3 is increased to cause the pressure to be reduced, and the second nitrogen pipe 31 provides the air inlet supplementing pressure until the first pressure sensor 33 displays that the pressure returns to the set working range.
Example 2
The embodiment provides a control method of a methanol fuel supply system.
The invention also provides a control method of the methanol fuel supply system, which comprises the following steps:
s1: inerting of the piping and host 5: inerting the pipeline of the methanol fuel supply system and the host 5 by inert gas;
s2: the first stage is to raise temperature and boost pressure: methanol enters a mixing tank 3 after being heated and pressurized in a first stage from a fuel tank 1;
s3: the second stage is to raise the temperature and pressure: methanol enters a host machine 5 after being heated and boosted in the second stage by a mixing tank 3;
s4: judging whether the ventilation times of the host 5 per hour is more than 32 times or not; and if the concentration of the methanol vapor in the host 5 is lower than 18% LEL, the step S5 is entered; if not, the host is not started;
s5: starting the host 5, loading and running until the fuel is burnt;
s6: closing the host 5, and cleaning the pipeline by using inert gas;
s7: the methanol fuel supply system is vented and degassed.
In the step S1, the inerting time is t1 seconds, and the calculation formula of t1 is:
wherein Q1 is the volume of the pipeline outside the main unit 5 along the path from the air source to the discharge port, Q2 is the volume of the main unit 5 to be blown off, VN2 is the nitrogen blowing speed, and n is the redundancy factor.
The inert gas is nitrogen, and a third nitrogen pipe is arranged at the liquid inlet end of the junction of the water adding pipeline 8 and the second fuel pipeline 4 by utilizing the nitrogen inerting pipeline and the host 5; nitrogen enters from the third nitrogen pipe, air in the second fuel pipeline 4 and the host machine 5 is blown off, the three-way valve is opened to communicate the fuel recovery pipeline 6, the nitrogen blown off air is discharged from the fuel recovery pipeline 6 to an open safety area through the opening valve, the valve of the fuel recovery pipeline 6 communicated with the fuel tank 1 is kept closed, and the inerting blowing lasts for a period of time t 1 Second, time t 1 Calculated from volume and purge rate.
The parameters in the above formula can be designed into different parameters according to the requirement, and Q is taken 1 ＝0.9m 3 ,Q 2 ＝0.3m 3 ,V N2 ＝0.1m 3 S, n=3; substituting formula to calculate t 1 =36 seconds. The above values are exemplary, not limiting, and are intended to be within the scope of the present invention by substituting different values. The first control panel 10 receives a time t 1 The end signal, i.e. the inerting is judged to be completed, the air in the pipe is replaced by nitrogen entirely, and the step S2 can be continued.
In the step S2, the pressure after the temperature rise and the pressure boost in the first stage is 5bar plus or minus 0.5bar; the temperature after the temperature rise and the pressure rise in the first stage is 10-20 ℃; in the step S3, the pressure after the temperature rise and the pressure boost in the second stage is 12 bar+/-0.5 bar; the temperature after the temperature rise and the pressure rise in the second stage is 30-40 ℃.
In the step S2, the first pressure pump 22 is started, methanol is filtered by the first filter 21 with a filter screen filtration precision of 20-50 um from the fuel tank 1, then is pressurized to 5bar±0.5bar by the first pressure pump 22, is heated by the first heat exchanger 23, and then is displayed as 12-13 ℃ by the second temperature sensor, and then enters the mixing tank 3. More specifically, the first heat exchanger 23 is a plate heat exchanger using ethylene glycol water as a medium, and an ethylene glycol water solution with an ethylene glycol concentration of 35% heats methanol to 12-13 ℃, and the filtering accuracy of the first filter 21 is 25-50 um. The pressure sensor is set to be in a normal working range of 5bar +/-0.5 bar, the second temperature sensor is set to be in a normal working range of 12-13 ℃, and the pressure sensor is connected to the second control panel 20 for real-time monitoring.
In the step S3, first, the second pressure pump 41 is started, the methanol is pressurized to 12bar±0.5bar from the mixing tank 3 via the second pressure pump 41, more preferably, heated to 30 ℃ to 35 ℃ via the second heat exchanger 42, filtered of impurities via the filter 114 (filter screen filtration accuracy of 10 to 20 um), and further heated to a specified threshold via the electric tracing 44. The method comprises the following steps: the methanol is pressurized by the second pressure pump 41, is heated by the second heat exchanger 42 after detecting 12bar + -0.5 bar by the second pressure sensor, more preferably by the third temperature sensor after detecting 30-35 deg.c, and proceeds to the cabin line of the main unit 5. Before entering the cabin double-wall pipe, if the temperature of the methanol in the second fuel pipeline 4 drops to a certain threshold value in cold outdoor weather, the electric tracing 44 will be started, and the second fuel pipeline 4 is heated through the tracing band wound outside the pipe, so that the temperature of the methanol fuel in the pipe reaches a specified threshold value and then enters the cabin for the host machine 5 to use.
Further, in step S4, as shown in fig. 4, the second fuel line 4 and the fuel recovery line 6 are in the form of double-wall pipes in the cabin interior area and the main engine interior, and are kept in communication, the double-wall pipe outer pipe is provided with an outlet, an inlet, a fan 51, a flow detector 52, a hydrocarbon gas detector 53, the fan 51 is controlled to be opened by the first control panel 10, ventilation is performed in the double-wall pipe interlayer space, the flow detector 52 is mounted on the inlet pipe 55, the ventilation air quantity is controlled to be detected by the first control panel 10, and the air quantity can be set to be more than 32 times per hour. The hydrocarbon gas detector 53 is arranged on the outlet pipe 54 before the fan 51, and is controlled and detected by the first control panel 10, and the threshold value is set to be that the concentration of the methanol evaporation gas is lower than 18 percent LEL. When the first control panel 10 detects that both conditions are met, the next step S5 is performed.
Further, in the step S5, the loading operation program is as follows:
a1: after the host 5 is loaded to the first load degree for operation, quantitatively providing water with the mass flow rate of 70-80% of the methanol flow rate, and enabling the water to enter the host 5 for mixed combustion with the methanol fuel;
a2: after the host 5 is loaded to the second load degree for operation; quantitatively providing water with the mass flow rate of 30% -40% of the methanol flow rate, and enabling the water to enter the host 5 to be mixed with methanol fuel for combustion;
The first load degree is smaller than the second load degree;
or in the step S5, the loading operation program is as follows: and a host 5.
Preferably: the first load degree is 20% -25%; the second load degree is 90% -100%.
Specifically, the host 5 is started to perform gradient loading load, and the methanol fuel is quantitatively provided for the host 5 to run at 20% -25% of load by controlling the running of the pump, the opening of the valve, the reflux of the bypass pipe and the monitoring feedback of the flowmeter through the cooperation control of a plurality of proportional valves, the flowmeter and the pressure pump on the pipeline. Further controlling the proportional valve, the flowmeter, the bypass pipe and the pump to control in a matching way, and quantitatively providing fresh water with the mass flow of 70-80% of the methanol flow into the host 5 to perform mixed combustion with the methanol fuel by controlling the operation of the pump, the opening of the valve, the backflow of the bypass pipe and the monitoring feedback of the flowmeter.
The control of the pressure pump operation, the valve opening, the bypass pipe backflow and the flowmeter monitoring feedback, the quantitative supply of the methanol fuel to the host machine 5 is performed at 100% load operation, meanwhile, the control of the proportional valve, the flowmeter, the bypass pipe and the pump is matched, and the control of the pump operation, the valve opening, the bypass pipe backflow and the flowmeter monitoring feedback is performed, so that the quantitative supply of water with the mass flow of 30% -40% of the methanol flow enters the host machine 5 to be mixed with the methanol fuel for combustion.
Further, in the step S6, the procedure of cleaning the pipe with inert gas is as follows:
b1: judging the fuel of the host 5; if 100% of the fuel is supplied from the fuel tank 1 by the host 5, the process proceeds to step B2; if the fuel of the host machine 5 is supplied by the water adding pipeline and the fuel pipeline together, namely, the mixed solution of methanol and water, the step B3 is carried out;
b2: starting an inert gas pipeline 7, and blowing methanol in the pipeline into a fuel tank to perform gas-liquid separation;
b3: the mixed solution is discharged into the bleeding tank 91, and step B2 is performed.
After the host 5 is stopped, the third nitrogen pipe is utilized to blow off, and the two conditions are divided: first case: when 100% of the fuel of the host 5 is supplied by the fuel tank 1, the emission under the condition can only reach the IMO Tier2 standard, only the nitrogen and methanol liquid mixture in the first fuel pipeline 2, the second fuel pipeline 4 and the host 5 is blown off, and the nitrogen and methanol liquid mixture is discharged to the fuel tank 1 through the first fuel pipeline 2, the second fuel pipeline 4 and the fuel recovery pipeline 6 in the host 5 for gas-liquid separation. Second case: when the fuel of the host 5 is supplied by the water adding pipeline and the fuel pipeline together, after the host is stopped, the first fuel pipeline 2, the second fuel pipeline 4 and the host 5 are the mixture of methanol and water, the water-doped methanol is firstly discharged to the discharging cabinet 91, and then the step of the first condition is executed, so that the water-doped methanol is prevented from directly returning to the fuel tank 1.
Further, in the step S7, the step of bleeding and degassing includes: the residual fuel and nitrogen in the evacuation piping and the main unit 5 are discharged into the relief tank 91.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention. Those skilled in the art can make other changes and modifications within the spirit of the invention, which are intended to be within the scope of the invention, without departing from the technical spirit of the invention. Such variations, which are in accordance with the spirit of the invention, are intended to be included within the scope of the invention as claimed.
Claims (9)
1. A methanol fuel supply system, characterized by comprising a fuel tank (1), a first fuel pipeline (2), a mixing tank (3), a second fuel pipeline (4), a host (5) and a fuel recovery pipeline (6) which are connected in sequence, wherein the tail end of the fuel recovery pipeline (6) is connected with the fuel tank (1);
the first fuel pipeline (2) is used for carrying out first-stage temperature rise and pressure rise on the methanol in the fuel tank (1);
The second fuel pipeline (4) is used for carrying out second-stage temperature rise and pressure rise on the methanol in the mixing tank (3);
the fuel recovery pipeline (6) is used for recovering methanol in a pipeline to the fuel tank (1) so as to realize the recovery and reutilization of fuel;
the fuel tank (1), the mixing tank (3) and the second fuel pipeline (4) are also provided with an inert gas pipeline (7) for inerting the pipeline;
the methanol fuel supply system further comprises a water adding pipeline (8), wherein the water adding pipeline (8) is arranged on the second fuel pipeline (4) and is used for mixing methanol in the second fuel pipeline (4) in proportion and then entering the host machine (5) for combustion; the first fuel pipeline (2) comprises a first filter (21), a first pressure pump (22) and a first heat exchanger (23) which are communicated in sequence;
the filtering precision of the filter screen of the first filter (21) is 20-50 um;
the first pressure pump (22) and the first heat exchanger (23) are used for heating and boosting in the first stage; the pressure of the first pressure pump (22) is 5 bar+/-0.5 bar; the temperature of the first heat exchanger (23) is 10-20 ℃;
the first fuel pipeline (2) further comprises a first proportional valve (24) which is arranged between the first pressure pump (22) and the first heat exchanger (23) and used for adjusting the flow rate of methanol; a first flowmeter (25) for calculating the flow rate of the methanol is further arranged between the first heat exchanger (23) and the mixing tank (3);
The second fuel pipeline (4) comprises a second pressure pump (41), a second heat exchanger (42) and a second filter (43) which are communicated in sequence;
the second pressure pump (41) and the second heat exchanger (42) are used for the second-stage temperature rise and pressure rise; the pressure of the second pressure pump (41) is 12 bar+/-0.5 bar; the temperature of the second heat exchanger (42) is 30-40 ℃;
the filtering precision of the filter screen of the second filter (43) is 10-20 um;
the second fuel line (4) further comprises an electric tracing (44) provided between the second filter (43) and the main machine (5); the electric tracing (44) is selectively started to heat the methanol before entering the host (5).
2. A methanol fuel supply system according to claim 1, characterized in that the methanol fuel supply system further comprises a bleed line (9); the drainage pipeline (9) comprises a drainage cabinet (91), a first liquid inlet main pipe (92) communicated with the drainage cabinet (91), a second liquid inlet main pipe (93) communicated with the drainage cabinet (91) and a plurality of liquid inlet branch pipes (94);
one end of each liquid inlet branch pipe (94) is respectively connected with the first fuel pipeline (2), the mixing tank (3), the second fuel pipeline (4) and the fuel recovery pipeline (6), and the other end is respectively connected with the first liquid inlet main pipe (92);
One end of the second liquid inlet main pipe (93) is connected with the bottom of the fuel tank (1); the other end is connected with a bleeder cabinet (91).
3. The methanol fuel supply system of claim 1 further comprising a plurality of bypass conduit assemblies and a proportional valve disposed on the bypass conduit assemblies; the bypass conduit assembly comprises a first bypass conduit (301), a second bypass conduit (302) and a third bypass conduit (303);
one end of the first bypass pipeline (301) is connected with the second fuel pipeline (4), and the other end of the first bypass pipeline is connected with the mixing tank (3);
one end of the second bypass pipeline (302) is connected with the first fuel pipeline (2), and the other end of the second bypass pipeline is connected with the fuel tank (1);
one end of the third bypass pipeline (303) is connected with the second fuel pipeline (4), and the other end of the third bypass pipeline is connected with the fuel tank (1);
the upper end of the mixing tank (3) is provided with a second nitrogen pipe (31), a first safety valve (32) and a first pressure sensor (33); the lower side is provided with a first low-level liquid level switch (34); a first temperature sensor (35) and a first high-level liquid level switch (36) are sequentially arranged on the upper side of the first low-level liquid level switch (34); one side of the mixing tank (3) is connected with a first fuel pipeline (2); the bottom is connected with a second fuel pipeline (4); the other side is connected with a third bypass pipeline (303);
The control method of the mixing tank (3) comprises the following steps: when the first low-level liquid level switch (34) alarms, the second control panel (20) controls the second pressure pump to reduce the displacement; when the first high-level liquid level switch alarms, the second control panel (20) controls the second pressure pump (41) to increase the displacement; the second nitrogen pipe (31) and the first pressure sensor (33) are controlled in a correlated way by a second control panel (20), the internal pressure of the mixing tank (3) is regulated to be in a specified threshold range through air inlet and return, and inerting blowing is performed when maintenance is needed; when the pressure in the mixing tank exceeds the working pressure and reaches a set threshold value of the first safety valve (32), the first safety valve (32) releases the overpressure.
4. A control method of the methanol fuel supply system as claimed in any one of claims 1 to 3, comprising the steps of:
s1: inerting of the pipeline and the host (5): inerting a pipeline and a host (5) of a methanol fuel supply system by using inert gas;
s2: the first stage is to raise temperature and boost pressure: methanol enters a mixing tank (3) from a fuel tank (1) after being heated and pressurized in a first stage;
s3: the second stage is to raise the temperature and pressure: methanol enters a host (5) after being heated and boosted in the second stage by a mixing tank (3);
s4: judging whether the ventilation times of the host (5) per hour is more than 30-45 times; and if the concentration of the methanol evaporation gas in the host (5) is lower than 18% LEL, the step S5 is entered; if not, the host (5) is not started;
S5: starting a host (5), loading operation and continuous fuel supply;
s6: closing the host (5) and cleaning the pipeline by using inert gas;
s7: the methanol fuel supply system is vented and degassed.
5. The control method according to claim 4, wherein in the step S5, the program for loading operation is: gradually increasing the load degree of the host (5) from zero; the proportion of the flow of water entering the host to the flow of methanol is gradually reduced from 90%.
6. The control method according to claim 5, wherein in the step S5, the program for loading operation is:
a1: after the host (5) is loaded to the first load degree for operation, quantitatively providing water with the mass flow rate of 70-80% of the methanol flow rate, and enabling the water to enter the host (5) for mixed combustion with the methanol fuel;
a2: after the host (5) is loaded to the second load degree for operation; quantitatively providing water with the mass flow rate of 30% -40% of the methanol flow rate, and enabling the water to enter a host (5) for mixed combustion with methanol fuel;
the first load degree is smaller than the second load degree; the second load degree is less than or equal to 100%.
7. The control method according to claim 6, wherein the first load degree is 20% to 25%; the second load degree is 90% -100%.
8. The control method according to claim 6, wherein in the step S6, the process of cleaning the pipe with the inert gas is:
b1: judging the fuel of the host (5); if the host (5) is supplied with 100% of fuel from the fuel tank (1), the step B2 is entered; if the fuel of the host (5) is supplied by the fuel tank (1) and the water adding pipeline (8), the step B3 is entered;
b2: starting an inert gas pipeline (7), and blowing methanol in the pipeline into a fuel tank (1) for gas-liquid separation;
b3: discharging the mixed solution to a discharge cabinet (91), and executing the step B2;
in the step S7, the step of discharging and degassing includes: residual fuel and nitrogen in the evacuation piping and the main unit (5) are discharged into the purge bin (91).
9. The control method according to claim 7, characterized in that theIn step S1, the inerting time is t 1 Second, t 1 The calculation formula is as follows:
q in 1 For the external pipe volume of the main unit (5) from the gas source to the discharge port, Q 2 V for the volume to be blown off inside the main machine (5) N2 The nitrogen purging speed is adopted, and n is a redundancy factor;
the pressure after the temperature rise and the pressure rise in the first stage is 5bar plus or minus 0.5bar; the temperature after the temperature rise and the pressure rise in the first stage is 10-20 ℃; in the step S3, the pressure after the temperature rise and the pressure boost in the second stage is 12 bar+/-0.5 bar; the temperature after the temperature rise and the pressure rise in the second stage is 30-40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348019.XA CN114635815B (en) | 2022-04-01 | 2022-04-01 | Methanol fuel supply system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348019.XA CN114635815B (en) | 2022-04-01 | 2022-04-01 | Methanol fuel supply system and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114635815A CN114635815A (en) | 2022-06-17 |
| CN114635815B true CN114635815B (en) | 2023-04-28 |
Family
ID=81951336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210348019.XA Active CN114635815B (en) | 2022-04-01 | 2022-04-01 | Methanol fuel supply system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114635815B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335859B (en) * | 2023-05-23 | 2023-09-15 | 潍柴动力股份有限公司 | Engine fuel supply system and control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06241132A (en) * | 1993-02-19 | 1994-08-30 | Aqueous Res:Kk | Hydrogen addition system and method for operating same |
| CA2433760A1 (en) * | 2001-01-09 | 2002-07-18 | Questair Technologies Inc. | Fuel cell power plant with energy recovery from fuel storage |
| CN1628226A (en) * | 2002-02-08 | 2005-06-15 | 关口株式会社 | Method of incinerating waste liquid utilizing industrial combustion equipment, and mixed liquid |
| WO2010058749A1 (en) * | 2008-11-18 | 2010-05-27 | 東京瓦斯株式会社 | Mcfc power generation system and method for operating same |
| CN102713243A (en) * | 2009-08-27 | 2012-10-03 | 麦卡利斯特技术有限责任公司 | Integrated fuel injectors and igniters and associated methods of use and manufacture |
| CN113090417A (en) * | 2021-03-29 | 2021-07-09 | 招商局重工(深圳)有限公司 | LPG gas-liquid separation jar and fuel control system |
| CN114109659A (en) * | 2021-11-26 | 2022-03-01 | 招商局重工(深圳)有限公司 | LPG fuel pipeline control method |
Family Cites Families (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3671613A (en) * | 1970-03-25 | 1972-06-20 | Marathon Oil Co | Pelleting of oil-coated carbon particles |
| US4876989A (en) * | 1988-05-10 | 1989-10-31 | Technology Development Associates, Inc. | Enhanced performance of alcohol fueled engine during cold conditions |
| US5245953A (en) * | 1991-07-31 | 1993-09-21 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Emulsion fuel engine |
| US5873916A (en) * | 1998-02-17 | 1999-02-23 | Caterpillar Inc. | Fuel emulsion blending system |
| JP2001229954A (en) * | 2000-02-17 | 2001-08-24 | Denso Corp | Fuel-cell system |
| ES2640910T3 (en) * | 2000-10-27 | 2017-11-07 | Air Products And Chemicals, Inc. | Systems and processes to provide hydrogen to fuel cells |
| JP2002208422A (en) * | 2001-01-09 | 2002-07-26 | Denso Corp | Fuel cell system |
| TWI222766B (en) * | 2001-01-15 | 2004-10-21 | Casio Computer Co Ltd | Power supply system and electronical mechanism |
| JP2007046538A (en) * | 2005-08-10 | 2007-02-22 | Honda Motor Co Ltd | Compression ignition internal combustion engine and its control method |
| JP4807706B2 (en) * | 2007-09-06 | 2011-11-02 | 本田技研工業株式会社 | Gasoline-ethanol separator |
| CN201184254Y (en) * | 2007-09-11 | 2009-01-21 | 张虓 | Alcoholization gasoline generator for gasoline internal combustion engine |
| US8903627B2 (en) * | 2010-11-17 | 2014-12-02 | Toyota Jidosha Kabushiki Kaisha | Control device of internal combustion engine |
| SI3299442T1 (en) * | 2010-11-25 | 2021-09-30 | Gane Energy & Resources Pty Ltd | Methanol containing fuel and process for powering a compression ignition engine with this fuel |
| KR102261770B1 (en) * | 2011-04-11 | 2021-06-07 | 노스트럼 에너지 피티이. 리미티드 | Internally cooled high compression lean-burning internal combustion engine |
| US8720390B2 (en) * | 2011-09-19 | 2014-05-13 | Northern Technologies International Corporation | Fuel performance booster |
| TW201527635A (en) * | 2013-10-21 | 2015-07-16 | Gane Energy & Resources Pty Ltd | Engine operation for viscosity control |
| CN103670841B (en) * | 2013-12-18 | 2015-09-16 | 武汉中醇化汽车新能源有限公司 | Back pressure type Aalcohols fuel transporting system and delivery method |
| JP6262076B2 (en) * | 2014-05-23 | 2018-01-17 | 三井造船株式会社 | Ships powered by methanol |
| DK179162B1 (en) * | 2016-05-02 | 2017-12-18 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | An internal combustion engine of two-stroke crosshead type, and a method of direct injection of fuel and water into a combustion chamber |
| DE102016222044B3 (en) * | 2016-11-10 | 2018-05-30 | Continental Automotive Gmbh | Method and device for determining the oil temperature in an internal combustion engine |
| JP6913270B2 (en) * | 2018-02-01 | 2021-08-04 | 株式会社三井Ｅ＆Ｓマシナリー | Fuel injection device for internal combustion engine using low ignitability fuel |
| EP3543501A1 (en) * | 2018-03-20 | 2019-09-25 | Fuelsave GmbH | Marine propulsion system and conversion method for same |
| DE102019114494B3 (en) * | 2019-05-29 | 2020-10-15 | Bayerische Motoren Werke Aktiengesellschaft | Method of determining air mass and direct water injection system |
| CN113047996A (en) * | 2021-03-31 | 2021-06-29 | 广船国际有限公司 | Methanol fuel dual-fuel supply system |
| CN113291412B (en) * | 2021-06-29 | 2022-05-13 | 广船国际有限公司 | Nitrogen system for ship and ship |
| CN113277055A (en) * | 2021-06-29 | 2021-08-20 | 广船国际有限公司 | Fuel mixing system for ship |
| CN114017228B (en) * | 2021-11-02 | 2023-11-07 | 招商局重工(深圳)有限公司 | Double inerting pipeline system of host |
-
2022
- 2022-04-01 CN CN202210348019.XA patent/CN114635815B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06241132A (en) * | 1993-02-19 | 1994-08-30 | Aqueous Res:Kk | Hydrogen addition system and method for operating same |
| CA2433760A1 (en) * | 2001-01-09 | 2002-07-18 | Questair Technologies Inc. | Fuel cell power plant with energy recovery from fuel storage |
| CN1628226A (en) * | 2002-02-08 | 2005-06-15 | 关口株式会社 | Method of incinerating waste liquid utilizing industrial combustion equipment, and mixed liquid |
| WO2010058749A1 (en) * | 2008-11-18 | 2010-05-27 | 東京瓦斯株式会社 | Mcfc power generation system and method for operating same |
| CN102713243A (en) * | 2009-08-27 | 2012-10-03 | 麦卡利斯特技术有限责任公司 | Integrated fuel injectors and igniters and associated methods of use and manufacture |
| CN113090417A (en) * | 2021-03-29 | 2021-07-09 | 招商局重工(深圳)有限公司 | LPG gas-liquid separation jar and fuel control system |
| CN114109659A (en) * | 2021-11-26 | 2022-03-01 | 招商局重工(深圳)有限公司 | LPG fuel pipeline control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114635815A (en) | 2022-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114320686B (en) | Marine methanol fuel supply method | |
| CN216429806U (en) | Methanol fuel supply system for ship | |
| WO2006028918B1 (en) | Marine vapor separator with bypass line | |
| CN114635815B (en) | Methanol fuel supply system and control method thereof | |
| CN105080278A (en) | Oil and gas recovery method | |
| CN113047996A (en) | Methanol fuel dual-fuel supply system | |
| CN204107268U (en) | Device for recovering oil and gas | |
| CN214533292U (en) | Marine liquid ammonia fuel supply and fuel recycle system | |
| CN213065523U (en) | Marine liquefied natural gas low pressure fuel supply system | |
| CN102494244B (en) | Pontoon LNG aeration device and operation method thereof | |
| CN204865443U (en) | Exhaust gas treating device | |
| CN202082615U (en) | Recovery system for gas emptied by high-pressure output pump in LNG (Liquefied Natural Gas) receiving terminal | |
| CN110159920A (en) | LNG air supply system peculiar to vessel | |
| CN106310699A (en) | Recovery system and recovery method for oil gas absorbed and desorbed by asymmetric double pots | |
| CN218130988U (en) | Oil gas recovery device | |
| CN212298527U (en) | Boil-off gas recovery system of hydrogenation station | |
| CN211893689U (en) | Fuel heating vehicle | |
| CN114183689A (en) | Automatic gas filling system and control method | |
| CN219242154U (en) | Liquid drainage system of reflux cooler of compressor | |
| CN218844460U (en) | Methanol fuel supply system | |
| CN109774953A (en) | A kind of aircraft fuel tank oxygen consumption type inerting system | |
| CN210771427U (en) | Device for utilizing nitrogen generated by natural evaporation in top space of liquid nitrogen storage tank | |
| CN218523402U (en) | Automatic pressurizing and overpressure safety discharger for liquid hydrogen storage tank | |
| CN219139239U (en) | Fuel supply system for internal combustion engine | |
| CN112696289B (en) | Marine liquid ammonia fuel supply and fuel recycling 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |