385 results about "Methanol fuel" patented technology

The invention relates to the technical field of ship fuel supply system control, and discloses a double-lug C-type LNG fuel cabin and methanol fuel self-adaptive switching control system which comprises a fuel state sensing module, a switching logic decision module, an execution mechanism control module, a safety redundancy guarantee module and a state feedback recording module. The fuel state sensing module is used for collecting and normalizing fuel parameters and mechanism operation state data; the switching logic decision module constructs a model to simulate switching dynamic characteristics and mechanism response characteristics, and performs parameter adaptation; the execution mechanism control module constructs an algorithm to calculate a switching pressure threshold value, a flow matching value and a valve group action time sequence; the safety redundancy guarantee module evaluates the switching safety; and the state feedback recording module performs secondary evaluation in combination with the environment working condition when the risk exists. According to the system, self-adaptive switching of LNG and methanol fuel is achieved, and switching accuracy, system stability and safety are improved.

The invention relates to the technical field of methanol combustion optimization, in particular to a methanol fuel combustion multi-target collaborative optimization method and a self-adaptive energy consumption regulation and control system, and solves the problem of balance between model precision and real-time optimization efficiency. The method comprises the following steps: constructing a special digital twinborn model, integrating a parameterized chemical reaction dynamic sub-model, a calibration interface dynamically coupled with real-time in-cylinder pressure data and a flow field simulation module, and continuously and dynamically updating; parallel simulation control parameter combination is carried out by using the dynamic model, and multi-target performance including at least two items of heat efficiency, NOx emission and combustion stability is predicted; outputting an optimization parameter set through Pareto frontier analysis of a multi-objective optimization algorithm; and finally, combining the parameter set with the real-time state of the model to select a control parameter to adjust the operation of the equipment, thereby realizing multi-target collaborative optimization and self-adaptive energy consumption regulation and control. According to the method, the system working condition adaptability, the multi-target optimization fineness and the energy consumption regulation and control intelligent level are improved.

The invention discloses a comprehensive control system and method for carbon emission of a methanol dual-fuel power ship. The method comprises the following steps: analyzing carbon emission characteristics at different moments by collecting and acquiring sensor data in real time; solving based on the constructed carbon emission optimization model in combination with a particle swarm algorithm to obtain the optimal ship navigational speed, adsorbent circulation rate and methanol fuel injection pressure corresponding to the minimum carbon emission of the methanol dual-fuel power ship; cO2 in tail gas is captured in real time through the ship carbon capture unit, the circulation rate of an adsorbent is adjusted in time according to optimization information of the ship navigation optimization control unit, the circulation efficiency of the adsorbent is calculated according to the carbon emission amount, the adsorbent is updated or replaced in time, and the comprehensive control process of the ship carbon emission is comprehensively evaluated. And comprehensive control of ship carbon emission is realized according to the comprehensive evaluation result. The problem of poor carbon emission control effect caused by insufficient cooperative control of a methanol dual-fuel power ship carbon capture device and a power system is solved.

The utility model provides a marine methanol fuel regulation and control system which comprises a supply device used for outputting methanol to an engine; the monitoring device is connected with the supply device and is used for acquiring the pressure in the supply device; the purging device is connected with the supply device and is used for purging the methanol in the supply device; the releasing device is connected with the purging device and is used for receiving and releasing the methanol discharged by the purging device; and the pneumatic device is connected with the supply device, the monitoring device, the purging device and the relief device and used for controlling opening and closing of the supply device, the purging device and the relief device according to the pressure obtained by the monitoring device. According to the marine methanol fuel regulation and control system, methanol fuel with appropriate pressure and flow can be provided for equipment such as a high-pressure methanol dual-fuel medium-speed engine, meanwhile, the pneumatic device can achieve internal control of the system, and related functions are completed.

The invention discloses a method for preparing a methanol fuel cell anode catalyst by doping a modified multi-walled carbon nanotube carrier. The method comprises the following steps: 1) acidizing an unmodified multi-walled carbon nanotube; (2) preparing the cerium oxide doped modified multi-walled carbon nanotube; and 3) preparing the cerium oxide doped modified multi-walled carbon nanotube carrier loaded PtFe bimetallic alloy catalyst. According to the method disclosed by the invention, the MWCNTs are induced by doping CeO2 to generate more oxygen vacancy defects, so that anchoring of more active sites of the PtFe alloy is facilitated, and MOR is promoted to improve the activity of the catalyst; the stable Ce < 4 + > can deform the surface structure of Pt, so that the binding bond energy of COads and-OH is stronger, and an anti-poisoning effect is achieved; the introduced Fe element and Pt have metal electronegativity difference, so that the adsorption bond energy of formic acid, formaldehyde and carbon monoxide intermediates generated by gradual dehydrogenation of Pt and methanol can be weakened, and the anti-toxicity effect is achieved; and the PtFe alloy and the CeO2 / MWCNTs are in synergistic interaction, so that the stability of the catalyst can be enhanced.

The invention relates to the technical field of process control, in particular to an in-cylinder direct injection methanol generator combustion system control method based on multi-objective optimization, which comprises the following steps: acquiring multi-source sensor data of a methanol generator, performing feature extraction and evaluation on the multi-source sensor data, and generating a control weight distribution matrix; performing weighted fusion by using the control weight distribution matrix to obtain a fusion control vector; the method comprises the following steps: constructing an in-cylinder process control model, adaptively adjusting model parameters in combination with physicochemical characteristics of methanol fuel and in-cylinder combustion characteristics, comprehensively evaluating energy conversion efficiency, emission level and operation stability by adopting a multi-objective optimization algorithm based on the process control model and in combination with real-time working condition data, and carrying out iterative search on a Pareto optimal solution set. Dynamically generating adaptive control parameters; and generating a control instruction according to the self-adaptive control parameters, and adjusting the operation parameters of the methanol generator in real time. Accurate control over the combustion system is achieved by dynamically adjusting the control parameters of the methanol generator.

This invention relates to a methanol fuel injector for an engine, comprising an injector body, a solenoid valve, a needle valve rod, a needle valve spring, and a needle valve. The solenoid valve is disposed on the top of the injector body. The solenoid valve includes a valve body, an electromagnet, and a solenoid valve spring. A control oil accumulator chamber is formed between the valve body and the needle valve spring. A control oil inlet is provided on one side of the injector body, communicating with the control oil accumulator chamber. A low-pressure chamber is formed between the valve body and the injector body. A control oil return port is provided on one side of the injector body, communicating with the low-pressure chamber. A methanol inlet passage is formed between the needle valve rod and the injector body. A methanol fuel accumulator chamber is formed between the needle valve and the injector body. A methanol inlet and return port is provided on one side of the injector body, communicating with the methanol inlet passage. This invention solves the problem of rapid wear of the control valve and effectively controls the upward leakage of methanol by introducing a piston structure.

The invention provides an energy-saving type energy storage power generation device based on methanol fuel, belongs to the technical field of methanol fuel power generation, and solves the technical problems that an existing methanol fuel power generation device is slow in ignition, energy cannot be efficiently utilized, the module integration efficiency is low and the like. Comprising a container, a heat exchange gasifier, a heat exchange heater, a methanol reforming fuel cell module, a methanol storage tank, a gasoline storage tank, a methanol fuel generator assembly, two cell modules and two attenuators are arranged in the container, and a water tank is arranged at the upper end of the methanol storage tank; material conveying metering pumps are arranged between the gasoline storage tank and the methanol fuel generator assembly and between the water tank and the heat exchange vaporizer, a material conveying metering pump is arranged between the methanol storage tank and the heat exchange heater, and a silencer, an engine heat dissipation system and a tail gas treatment assembly are arranged at the upper end of the container. The modular container design facilitates transportation and rapid deployment, is efficient, flexible, energy-saving and environment-friendly, and is provided with a multi-stage tail gas treatment and noise reduction system to ensure environment-friendly and low-noise operation.

The present invention provides a device and method for controlling the intake air temperature of a methanol compression ignition engine, belonging to the field of engine technology. The control device includes: an intercooler disposed on an intercooler circuit, the intercooler circuit being provided with a first valve; an intercooler bypass branch being provided with a second valve; an EGR cooler disposed on the EGR circuit, the EGR circuit being provided with a third valve and a fifth valve; an EGR bypass branch being provided with a fourth valve; and a controller for controlling one of the first and second valves to open and the other to close under cold start conditions or preset low-load conditions, adjusting the opening of the fourth valve based on an intake air temperature target value, and controlling the third and fifth valves to close. By providing an intercooler bypass, the present invention solves the problem that existing methanol compression ignition engines cannot achieve stable cold start ignition, sustained stable ignition, and stable combustion when burning pure methanol fuel in a low-temperature environment.

The invention relates to the field of power and energy engineering, in particular to a methanol-diesel dual-fuel internal mixing type fuel injector capable of being independently controlled. In order to overcome the defects that in the prior art, a dual-fuel injection system is complex in structure, the size of an oil injector is large, a cylinder cover is difficult to install, the fuel premixing capacity is poor, and injection control is not flexible, the technical scheme is that the methanol-diesel oil dual-fuel internal mixing type oil injector capable of being independently controlled comprises an oil injector shell; the fuel injector shell is provided with a methanol fuel inlet, a diesel fuel inlet, a fuel injection hole as well as a methanol oil way and a diesel oil way which are respectively connected with the methanol fuel inlet and the diesel fuel inlet; a methanol control assembly, a diesel oil control assembly, a pressure control chamber, a ball valve, a needle valve and a premixing pressure cavity are arranged in the oil injector, injection of methanol and injection of diesel oil can be controlled respectively, and mixed injection of two kinds of fuel can be achieved in the premixing pressure cavity. The methanol-diesel oil dual-fuel efficient mixed injection system is suitable for modification work of an engine oil injection system needing to achieve methanol-diesel oil dual-fuel efficient mixed injection and precise control in the fields of ship power, heavy vehicles, engineering machinery and the like.

The invention discloses a fuel treatment system of a V-shaped methanol fuel engine for a ship. The fuel treatment system comprises a split-flow conveying module, a fuel supply module, a fuel injection module, a leakage collection module, a leakage alarm module, a nitrogen purging module and a forced exhaust module. The fuel supply modules are divided into a column A and a column B, the split-flow conveying module conveys fuel to the column A and the column B of the fuel supply modules, and the columns of the fuel supply modules are connected through pipelines; each fuel supply module is connected with the multiple fuel injection modules and used for supplying methanol fuel in the main pipeline to the fuel injection modules to complete fuel conveying; according to the fuel treatment system of the V-shaped methanol fuel engine for the ship, the functions of stable-pressure supply of the V-shaped methanol fuel engine, safety protection of key leakage parts, monitoring and treatment of gas-liquid two-state leaked fuel, fuel emptying in the processes of shutdown maintenance and the like are achieved, safe use of fuel in the whole use process of the engine is achieved, and personnel safety is guaranteed.

The invention discloses a methanol fuel liquid supply device and a debugging method, the methanol fuel liquid supply device comprises a methanol fuel cabin and a methanol fuel liquid supply unit, the methanol fuel cabin is used for storing methanol; the methanol fuel liquid supply unit comprises a liquid inlet pipeline as well as a first control valve, a pressure boosting and stabilizing assembly and a second control valve which are sequentially communicated in the liquid inlet direction of the liquid inlet pipeline, the liquid inlet pipeline is connected with the methanol fuel cabin, and the pressure boosting and stabilizing assembly sequentially comprises a first boosting device, an air pressure buffer device and a second boosting device in the liquid inlet direction. According to the methanol fuel liquid supply device, by arranging the pressure boosting and stabilizing assembly, stable liquid supply of methanol fuel can be rapidly achieved, and the debugging time is saved. According to the debugging method, the methanol fuel liquid supply device on the ship is debugged in the mooring stage, rapid debugging can be achieved through the adopted debugging method, the wharf mooring test period is greatly shortened, the mooring period can be shortened by 4-5 days, and the expenditure proportion is reduced by about 20%.

The invention relates to the field of methanol fuels, and particularly discloses a synthetic environment-friendly methanol fuel and a preparation method thereof, the synthetic environment-friendly methanol fuel comprises the following raw materials by weight: 50-70 parts of methanol, 15-30 parts of biomass blend oil, 1-4 parts of a mutual solvent, 0.5-2 parts of a cetane number improver, 0.01-0.05 part of a cleaning dispersant, 0.002-0.01 part of a metal corrosion inhibitor, 0.003-0.015 part of an acid neutralizer, and 0.005-0.02 part of a stabilizer. The biomass blend oil is prepared from waste animal and vegetable oil through transesterification and hydrogenation upgrading processes. According to the invention, the biomass blend oil is prepared from waste animal and vegetable oil through ester exchange and hydrogenation upgrading processes, so that resource utilization of wastes is realized, and more importantly, the inherent defects of too low cetane number and insufficient heat value of methanol are effectively overcome due to the characteristics of high cetane number, high saturation and low oxygen content of the biomass blend oil; the fuel can be stably and efficiently combusted in a compression ignition engine, meanwhile, emission of particulate matter and uncombusted hydrocarbon is remarkably reduced, and environmental friendliness is embodied from the source.

The invention discloses an engine combustion system based on methanol fuel, and belongs to the technical field of engines, and the system is characterized in that a first outlet of a methanol storage tank is communicated to a gas inlet channel methanol nozzle of a main combustion chamber; a second outlet of the methanol storage tank is communicated to a first inlet of the waste gas heat exchanger, and is communicated to a first inlet of the methanol reformer through a first outlet of the waste gas heat exchanger; a first outlet of the methanol reformer is communicated to a gas inlet channel reformed gas nozzle of the main combustion chamber and a pre-combustion chamber reformed gas nozzle; an exhaust pipe outlet of the main combustion chamber communicates with a second inlet of the waste gas heat exchanger so as to communicate with a second inlet of the methanol reformer through a second outlet of the waste gas heat exchanger. Waste gas waste heat is used for methanol vaporization and reforming reaction, hydrogen-rich reformed gas is generated, the waste gas waste heat is efficiently utilized, the energy utilization rate is increased, the reformed gas is introduced into the pre-combustion chamber and the main combustion chamber, jet flow ignition energy is enhanced, in-cylinder combustion is accelerated, and the combustion efficiency is improved.

The invention relates to the field of fuel catalysts, in particular to a high-stability methanol fuel catalyst and a preparation method thereof. The catalyst comprises the following components: a TiO2 (at) Al2O3 core-shell carrier, a block copolymer P123, 3-aminopropyltriethoxysilane, H2PtCl6. 6H2O, ascorbic acid, ethidene diamine and tetraethoxysilane, and is characterized in that the core-shell carrier is a TiO2 (at) Al2O3 core-shell carrier; an anatase TiO2 core is prepared through a weak acid precipitation-calcination method, a gamma-Al2O3 shell is mildly hydrolyzed and coated, an oxygen vacancy electron library and a Lewis acid site are constructed, an aminated carrier is induced by a P123 template to grow an ordered mesoporous SiO2 shell, ethylenediamine complexed platinum atoms are anchored to pore walls, and the hierarchical structure endows the catalyst with high stability, carbon deposition resistance and reversible regeneration characteristics.

The invention discloses a flux-based preparation method of metal organic gel, which is characterized in that a series of metal organic gel materials are prepared by controlling proportion and temperature by taking ferric salt and any other mixed metal salts and organic ligands as raw materials, and the metal organic gel materials are directly used as an anode catalyst of a methanol fuel cell. The synthesis method is simple, the reproducibility is good, batch production can be achieved, and the prepared metal organic gel has the excellent methanol fuel cell anodic oxidation performance.

The invention discloses a combustion chamber regenerative cooling type turbofan engine system based on methanol fuel, relates to the technical field of aero-engines, and solves the problems that a traditional aero-engine is insufficient in cooling capacity and large in pollution. An air inlet channel, a fan, an air compressor system, a combustion chamber, a turbine system and an exhaust nozzle are sequentially communicated, and the outlet end of the exhaust nozzle is communicated with the atmosphere; the fan, the gas compressor system and the turbine system are connected through a shaft; a regeneration cooling channel is arranged in the combustion chamber, the methanol fuel tank is communicated with the regeneration cooling channel, methanol absorbs heat and evaporates in the regeneration cooling channel and is cracked to form mixed gas at the same time, and the mixed gas and air are combusted after being mixed. The regenerative cooling technology is applied to the turbofan engine, methanol serves as fuel and coolant, heat of a combustion chamber is absorbed to be evaporated and vaporized, meanwhile, the methanol is cracked to form mixed gas for combustion, dependence of a traditional engine on cooling air is reduced, the heat efficiency of the engine is improved, and meanwhile the combustion performance of methanol fuel is enhanced.

The application relates to the field of methanol generator technology, and discloses a protection device for a methanol generator with smoke removal and heat dissipation, which comprises a box container containing a methanol generator set, a methanol fuel chamber, an exhaust chamber, a cabin chamber and a charging device chamber are arranged in the box container, the methanol fuel chamber is used for containing a methanol fuel tank, the cabin chamber is used for containing the methanol generator set, a methanol concentration sensor is installed in the methanol fuel chamber, a liquid nitrogen tank is further arranged in the methanol fuel chamber, a spray pipe is connected to the outlet of the liquid nitrogen tank, a spray head is arranged on the spray pipe, an electric valve is installed at the outlet of the liquid nitrogen, and the methanol concentration sensor is electrically connected with the electric valve. The application has the effects of preventing the methanol fuel tank from catching fire due to methanol leakage during use, protecting the equipment safety of the methanol generator set and the use safety of a user.

The invention discloses an integrated charging method, system and equipment based on methanol fuel power generation, and belongs to the technical field of new energy automobile charging facilities. According to the scheme, the control system, the fuel storage and supply module, the methanol power generation module, the energy storage buffer module, the 40KW direct current quick charging module, the energy management unit, the mute box body and the like are highly integrated, so that the emergency quick charging service independent of a power grid is realized. The core innovation lies in that the energy management unit is adopted to dynamically coordinate power generation and charging requirements, comprehensive mute design and comprehensive safety protection are combined, and the problems that an existing fast charging station depends on a power grid, a traditional standby power supply is large in noise and high in pollution, hydrogen fuel facility cost is high, and the system integration degree is low are solved. The system has the advantages of being clean, efficient, low in noise and rapid in deployment, and the electric vehicle charging requirements of remote areas, weak power grid areas and emergency scenes can be met.

The invention belongs to the technical field of catalyst preparation and methanol fuel cells, and particularly relates to a Pt-based composite catalyst, a membrane electrode and a preparation method and application of the Pt-based composite catalyst and the membrane electrode. The preparation method of the Pt-based composite catalyst comprises the following steps: carrying out a hydrothermal reaction on graphene oxide, nickel salt and a nitrogen source under an alkaline condition, sequentially carrying out dipping treatment and reduction treatment on the obtained Ni (OH) 2 / NC material and a platinum source in water, mixing the obtained Pt / Ni (OH) 2 / NC material with polypyrrole and water, and carrying out ultrasonic treatment to obtain the Pt-based composite catalyst. And dispersing the obtained Pt / Ni (OH) 2-PPy / NC catalyst in a first mixed solution obtained by heating polyvinyl alcohol, glycerol, ethylene glycol, trehalose and water, and carrying out circulating freezing-unfreezing treatment to obtain the Pt-based composite catalyst. When the Pt-based composite catalyst provided by the invention is used as an anode catalyst of a membrane electrode, the low-temperature performance of a methanol fuel cell can be remarkably improved.

The utility model discloses a hydrogen production and power generation coupling system based on methanol concentration difference, which relates to the technical field of methanol electrolysis hydrogen production and comprises a methanol electrolysis hydrogen production reactor, a methanol water supply unit, a direct methanol fuel cell and an energy storage cell, the methanol water supply unit provides methanol water required by hydrogen production for the methanol electrolysis hydrogen production reactor, and a water outlet of the methanol electrolysis hydrogen production reactor is communicated with a water inlet of the direct methanol fuel cell, so that low-concentration methanol water output by the methanol electrolysis hydrogen production reactor is input into the direct methanol fuel cell for power generation; the direct methanol fuel cell, the energy storage cell and the methanol electrolysis hydrogen production reactor are sequentially in circuit connection. According to the methanol electrolysis hydrogen production reactor, the high-concentration methanol aqueous solution is used for electrolysis hydrogen production, the output low-concentration methanol aqueous solution serves as a raw material for power generation of the direct methanol fuel cell, the direct methanol fuel cell generates power and then supplies the power for hydrogen production of the methanol electrolysis hydrogen production reactor, an external power source is not needed for power supply, and the system efficiency is high.

The utility model relates to a filter for methanol fuel, and relates to the technical field of methanol fuel filters. The filter comprises a filter mounting pipe, the two ends of the filter mounting pipe are open, the top wall of the filter mounting pipe is communicated with a vertical mounting pipe, the sections of the filter mounting pipe and the vertical mounting pipe are T-shaped, a filter body is arranged in the vertical mounting pipe, a sealing cover is arranged at the top end of the vertical mounting pipe, and the top end of the filter body is connected with the sealing cover. A locking assembly used for fixing the sealing cover to the vertical mounting pipe is arranged on the vertical mounting pipe. The utility model has the effects of simplifying the design of the filter system and improving the convenience and reliability of maintenance and operation of the filter.

The invention aims to provide a single needle valve type high-response methanol-diesel injector based on opposed electromagnetic valve control, and belongs to the field of engines. Opposite type double-medium channel control assemblies are installed in an ejector connector body, an ejector middle body and an ejector throttling block, a methanol / diesel shared nozzle assembly is installed in a nozzle body, a diesel connector and a methanol connector are installed on the side of the ejector connector body, a high-pressure diesel channel is arranged in the diesel connector, and a high-pressure methanol channel is arranged in the methanol connector. Free connection and disconnection of an internal high-pressure methanol path and an internal high-pressure diesel path can be controlled, then independent injection of methanol fuel and diesel fuel is achieved, the two fuel injection modes are controlled through the same needle valve, the fuel is injected through the same injection hole, and the advantages of being high in reliability and simple in structure are achieved. And after methanol / diesel oil injection is finished, rapid cut-off of an internal passage of the injector and rapid seating of the needle valve can be achieved, and the response characteristic of fuel injection mode switching of the injector is improved.

A methanol fuel preparation room with separation devices is characterized in that the preparation room is provided with side bulkheads and a top bulkhead, the separation devices are arranged in the preparation room and at the intersections of the top bulkhead and the two side bulkheads, each separation device comprises a first square shell and a second square shell, and the second square shell is located in the first square shell; two side plates of the first square shell are overflow side plates with openings in the tops, the other two side plates of the second square shell are grid side plates, the grid side plates and the overflow side plates are spaced, a lower bottom plate of the first square shell is obliquely arranged relative to the horizontal plane, and the end, connected with the side bulkhead, of the lower bottom plate of the first square shell is lower than the other end of the lower bottom plate of the first square shell. And an upper bottom plate of the second square shell is horizontally arranged. A round hole is formed in a top plate of the second square shell, and a mixture containing methanol and water flows into the separation device from the round hole. The method disclosed by the invention has the characteristics of high efficiency and strong adaptability on primary purification of methanol, is beneficial to environmental protection, is beneficial to conforming to the environmental protection standard and is beneficial to reducing the treatment cost.

The invention discloses a layered multi-dimensional fault diagnosis method and system for a methanol fuel ship power system, and relates to the technical field of fault diagnosis and monitoring of ship power systems, and the method comprises the steps: dividing into four coupling levels along a path of methanol supply-chemical electric energy conversion-motor propulsion-whole ship energy efficiency; constructing a hierarchical coupling diagnosis model comprising a local diagnosis function of each level, a system overall diagnosis function, a cooperative monitoring and diagnosis iteration relation and a coupling correlation model; collecting and preprocessing real-time operation data of each hierarchy, inputting the real-time operation data into the model for fault diagnosis and cross-hierarchy association analysis, obtaining and outputting a diagnosis result, and generating differentiated disposal suggestions; the method is accurate in diagnosis value quantification, high in objectivity, extremely simple and practical in hierarchical correlation formula, and excellent in real-time performance; coupling fault identification is efficient, coverage is comprehensive, cascade fault tracing is accurate, and disposal is efficient; and the adaptability and the reliability are high.

The utility model discloses a methanol range extender for agricultural machinery. The methanol range extender comprises an engine system, a storage system, a generator system and a control system, the engine system comprises a methanol engine, the methanol engine is provided with an air inlet pipe used for air entering and an exhaust pipe used for exhaust of waste gas, an air inlet unit is arranged at the air inlet pipe and used for controlling the amount of air entering the methanol engine, and an exhaust unit is arranged at the exhaust pipe and used for purifying and exhausting the waste gas generated by the methanol engine. The storage system comprises a methanol oil tank used for storing methanol, and a first conveying pipeline and a second conveying pipeline are arranged between the methanol oil tank and the methanol engine. According to the methanol range extender for the agricultural machine, methanol steam in the methanol oil tank can be adsorbed in time, the adsorbed methanol steam is conveyed to a methanol engine for combustion of the methanol engine, and the problems of waste and potential safety hazards caused by the fact that methanol in the methanol oil tank is volatilized more easily due to the fact that the working environment of the agricultural machine is worse and the agricultural machine runs more joltly are solved.

The application discloses a kind of based on digital twinning methanol fuel supply system intelligent operation and maintenance platform, belong to ship power and industrial automation technical field.The platform includes data acquisition and management module, digital twinning state mapping module, multi-working condition feature extraction and diagnosis module, operation and maintenance decision and evaluation module and visual display module.Platform carries out real-time acquisition, time synchronization and quality gate control fusion to operating parameter and safety monitoring data, and constructs physical residual characteristic quantity based on digital twinning model output and real-time observation data;Combining fault sensitive feature extraction and evidence fusion realizes fault identification, and passes through remaining useful life prediction and operation and maintenance optimization output under safety constraint maintenance suggestion, can be used for methanol fuel supply system state monitoring, fault diagnosis, life prediction and operation and maintenance decision support.

The application discloses a valve group unit for a marine methanol boiler and relates to the technical field of a valve group unit for a marine methanol fuel boiler. The application adopts a three-way valve to replace a traditional straight-through valve, reduces the number of valves and interfaces, reduces the risk of leakage, and realizes lightweight design of the valve group. The control system is simplified, and the starting time of fuel supply is shortened. The flow regulating valve adopts a combined design of an inserted regulating valve and a shielding rotary disc, utilizes staggered and aligned dynamic and static circular holes, realizes accurate control of the flow, and the valve opening degree can be flexibly adjusted within the range of 0-100%. The valve group design improves the safety, reliability and operation efficiency of the system, and meets the requirements of the marine methanol boiler for high efficiency, safety and accurate control.

The invention relates to the technical field of engines, and discloses a methanol injector and a methanol fuel engine, and the methanol injector comprises a first cavity, a first control mechanism, a second cavity, an adjusting mechanism, a third cavity, a nozzle, a methanol channel, an air channel and a second control mechanism. In the working process, the first control mechanism opens the first communicating hole, methanol fuel in the control cavity flows into the first cavity, the adjusting mechanism is far away from the third communicating hole so that the third communicating hole can be opened, and methanol fuel in the pressure storage cavity can flow into the third cavity through the third communicating hole; meanwhile, the second control mechanism opens the air inlet, and then air flows into the third cavity after flowing into the air channel from the air inlet. Therefore, the methanol fuel and the air can be fiercely mixed in the third cavity and then sprayed into the air cylinder of the engine body through the spraying hole of the nozzle, the atomization effect of the sprayed methanol fuel can be improved, and then the cold start efficiency of the methanol fuel engine is improved.

The invention provides a cylinder oil composition suitable for a methanol fuel ship and a preparation method of the cylinder oil composition, and particularly relates to the technical field of lubricating oil. The cylinder oil composition suitable for the methanol fuel ship comprises the following components in percentage by mass: 5.0%-20% of a clearing agent, 1.0%-8.0% of an ashless dispersant, 0.5%-1.5% of a composite antioxidant, 0.5%-3% of an anti-wear agent, 0.01%-1% of a metal deactivator and the balance of base oil, the detergent is composed of high-base-number synthetic calcium sulfonate, low-base-number synthetic calcium sulfonate, high-base-number calcium boride sulfonate and high-base-number sulfurized calcium alkyl phenolate. According to the cylinder oil composition for the methanol fuel ship, the scheme of the purification dispersant is optimized, and a plurality of components such as the metal deactivator are introduced for combination, so that the obtained cylinder oil composition for the methanol fuel ship improves the wear resistance and the corrosion resistance of an oil product when the oil product is polluted by methanol and formic acid, and can meet the performance requirements when a marine two-stroke engine uses methanol fuel.