1389results about How to "Improve combustion effect" patented technology

The invention relates to a synthetic route of a hydrocarbon fuel with high density and high volumetric calorific value by using a lignocelluloses-based platform chemical compound as a raw material and completely independent of fossil energy. A liquid fuel obtained by the method can be used in various aircrafts or used as an additive to raise combustion performance of aviation fuel. The method is divided into two parts: 1) under the promotion action of an acid/base catalyst, cyclopentanone (furfural selective hydrogenation product) is subjected to an aldol self-condensation reaction to synthesize unsaturated organic compounds with C10 and C15 polycyclic structures; and 2) a metal loaded A/X catalyst is used to carry out a one-step hydrodeoxygenation and hydrogenation reaction on products generated from the step 1 under low-temperature solvent-free conditions, so as to obtain polycyclic hydrocarbon fuel with carbon number being 10 and 15. The liquid fuel has high density (C10: 0.92g/cm<3>; C15: 1.12g/cm<3>), can be used to effectively raise carrying energy of an aircraft and reduce fuel consumption rate, and meets requirements of high navigational speed, large load and long range.

The invention provides a dual-rotational-flow inspirator, which comprises a top cover, a nozzle, an upper bottom, a middle bottom, a gas whirlcone and an inspirator cavity, wherein the inspirator cavity is a barrel-shaped hollow cylinder; a fuel cavity is formed between the top cover and the upper bottom of the inspirator; a gas oxidizing agent cavity is formed between the upper bottom and the middle bottom of the inspirator; a water cavity is formed between the middle bottom of the inspirator and the base of the inspirator; an inner nozzle passes through mounting holes in the upper bottom, the middle bottom and the inspirator cavity and is fixedly arranged on the upper bottom via a thread; the gas whirlcone is installed on the nozzle by a thread; water nozzles are water holes evenly distributed on the circumstance on the base of the inspirator. The inspirator provided by the invention has the characteristics of simple structure, low cost, good atomization performance and stable flame.

A fuel injector assembly includes a first coil that induces a time varying magnetic field into a second coil that is utilized to heat fuel flowing through the fuel injector. A first coil receives a first signal from a driver to generate a first magnetic field that moves an armature between an open and closed position. The second coil generates a second magnetic field generated by a current induced by the first coil into the second coil. The induced current is generated by an alternating current signal that is interposed onto a direct current signal sent to the first coil. The alternating current signal produces a time varying second magnetic field that induces heating of a magnetically active component with the fuel flow that in turn heats the fuel.

The invention relates to a halogen-free intumescent flame-retardant polypropylene/ethylene vinyl acetate cable material which is characterized by comprising the following components by weight part: 20-40 parts of polypropylene, 60-80 parts of ethylene vinyl acetate, 45-65 parts of compound flame retardant, 5-15 parts of grafting agent, 1.0-2.0 parts of antioxidizer, 1.0-2.0 parts of ultraviolet absorbent and 1.0-3.0 of processing aid. With the advantages of favorable flexibility, high breakage extensibility, favorable tensile strength, excellent electrical insulating property and good flame retardant, the material favorably meets the requirements on the burning property, the mechanical property and the heat property of the cable material and is mainly used as the outer coating material ofcables.

The invention discloses a rapid investment casting method based on stereolithography (SL). A wax mould in investment casting is replaced with a resin prototype (1) produced by applying a 3D printing technology, the resin prototype (1) is of a thin-walled honeycomb structure, an ingate (2) is arranged on the resin prototype (1), a gating system adopts a conventional wax gating system (3), a groove (4) is formed in the wax gating system (3), the ingate (2) is inserted into the groove (4) to be bonded and fixed during tree casting, a wax rod (5) is arranged on the resin prototype (1), and vent holes are formed after shell making. The rapid investment casting method reduces the casting cost, reduces the production cycle, and avoids the cracking phenomenon of a shell in the process of roasting.

The invention provides a blow molding type halogen-free flame-retardant polypropylene material, which comprises the following components in part by weight: 100 parts of polypropylene, 40 to 85 parts of phosphorus-nitrogen series expanded halogen-free composite flame retardant, 3 to 20 parts of resin modifier, 0.05 to 0.5 part of pigment, 0.4 to 2.0 parts of antioxidant, 0.3 to 2.0 parts of ultraviolet absorbent, 0.3 to 2.0 parts of light stabilizer, and 1.0 to 3.0 parts of other processing aids. The material has good tensile strength, high impact strength, good low-temperature performance and excellent flame-retardant performance, and is particularly suitable for hollow blow molding type small and large components of automobiles, furniture and the like.

The invention provides a multifunctional gasoline compound additive which is capable of reducing fuel consumption and decreasing the pollution caused by tail gas emission. The additive comprises a gasoline cleaning agent, a combustion improver, a low temperature start improving agent, an antiknock agent, an anti-oxidizing and anti-gum agent and a metal corrosion inhibitor. By adopting the gasoline compound additive, the cleanness, oxidation resistance and anti-corrosion performance of gasoline can be improved; and meanwhile, the combustion performance of fuel oil can be improved, the fuel consumption is reduced, and the automobile tail gas pollutants can be reduced.

A method and apparatus for low-NOx combustion of a pulverized solid fuel in which combustion products from a partial oxidation combustor are mixed with a pulverized solid fuel, thereby preheating the pulverized solid fuel and resulting in devolatilization of at least a portion of the pulverized solid fuel. The preheated pulverized solid fuel and the devolatilization products are then burned in a burner firing directly into a combustion chamber.

A system for improving the performance of a combustion engine comprising a system control unit is disclosed. The system control unit comprises an input module, a transform module and a control module all interconnected to each other. The input module obtains a first set of combustion parameters of the engine through at least one sensor. The transform module transforms the first set of combustion parameters into a second set of combustion parameters. The control module controls fuel injection of the engine based on the second set of combustion parameters, and controls oxyhydrogen production and injection based on the second set of combustion parameters. The controlled fuel injection and the controlled oxyhydrogen production and injection contribute to an improved performance of said engine during combustion. A method of improving the performance of a combustion engine and a method of injecting oxyhydrogen into a combustion engine are also disclosed.

The invention provides a combined fuel oil atomizing, evaporating and combusting device for a gas turbine, relates to an air inlet device of the gas turbine, a fuel oil atomizing, evaporating and blending device, and core technology of organized combustion and stable flame, and belongs to the power field of an aeronautic power propulsion system and a ground gas turbine. A nozzle 1 is arranged at a central position of an inlet of a premixing chamber 2; an evaporator 3 is fixed in an inner cavity of the premixing chamber 2; double cyclones 4 are arranged at the inside of the outlet end of the premixing chamber 2 and connected hermetically; a centrifugal nozzle 5 is arranged at a central position of the double cyclones 4; a venturi 6 is welded at a transition position of an outlet of internal and external cyclones of the double cyclones 4; a sleeve 7 is hermetically welded with the outside of an outlet of the premixing chamber 2; and the head of a combustion chamber 8 is hermetically welded with the sleeve 7. Compared with the prior fuel oil combined nozzle, the device has the advantages of improving properties of fuel oil atomizing, evaporating and blending and evenness of oil-gas space distribution, improving combustion performance, shortening flame length and reducing discharge of pollutant, and is a comparatively ideal combined fuel oil atomizing and combusting device for a high-performance gas turbine.

A fuel injector assembly includes a first coil driven by a direct current driver and a second coil driven by an alternating current driver where both the first coil and the second coil share a common connection to reduce the number of external terminal connections. The second coil generates a second magnetic field that is utilized to heat a component in thermal contact with the fuel flow that in turn heats fuel before exiting the fuel injector.

The invention provides a sulfur-fixing combustion-supporting high-temperature profile control agent, and a preparation method and application thereof. By taking the total weight of the sulfur-fixing combustion-supporting high-temperature profile control agent as 100%, the profile control agent is prepared from the following raw materials in percentage by weight: 3-5% of soft oil sludge, 2-4% of silicon sludge, 1-2% of low sulfur coal powder, 0.8-1.5% of sodium bentonite, 0.5-1.2% of plant fiber particle, 0.2-0.3% of saltpetre powder, 0.1-0.2% of coal gangue powder, 0.2-0.4% of limestone powder, 0.1-0.2% of polyanionic cellulose, 0.08-0.15% of alpha-sodium olefinsulfonate, 0.1-0.2% of sodium tripolyphosphate and the balance of water. The profile control agent has favorable stratum compatibility, causes no damage to the oil reservoir, does not pollute the stratum, and has favorable temperature tolerance; and meanwhile, the profile control agent has sulfur-fixing and combustion-supporting functions, thereby being completely applicable to a profile control technology for a thick oil fireflood chemical profile control gas injection well.

The invention relates to the field of engine exhaust gas recirculation rate control, in particular to an engine exhaust gas recirculation (EGR) valve closed-loop control system which comprises an EGR valve, a target EGR rate selection module, an actual EGR rate measurement module and a proportion integration differentiation (PID) controller. The target EGR rate selection module stores target EGR rates under different work conditions, the actual EGR rate measurement module can measure the actual EGR rate of an EGR valve under the current work condition, the actual EGR rate measurement module can send the actual EGR rate under the current work condition to the PID controller, and the target EGR rate selection module can send a target EGR rate corresponding to the current work condition to the PID controller. If the actual EGR rate and the target EGR rate are identical, the EGR valve remains valve core opening degree. If the actual EGR rate and the target EGR rate are different, the valve core opening degree of the EGR valve is adjusted so as to adjust the EGR rate. The system can monitor the EGR rate in real time, guarantees that the actual EGR rate and the target EGR rate are identical, enables an engine to be in the best condition and improves gasoline combustion performance.

The invention discloses an alcohol-based fuel combustion improver and an alcohol-based fuel. The alcohol-based fuel combustion improver consists of 4.9-93 parts by weight of co-solvent, 4.9-93 parts by weight of bio-oil, 0.1-0.3 part by weight of smoke suppression combustion improver and 1.0-3.0 parts by weight of combustion improver; and the alcohol-based fuel is formed by mixing and stirring 80-99 parts by weight of methanol and 1-20 parts by weight of alcohol-based fuel combustion improver. By adopting the combustion improver disclosed by the invention, the prepared alcohol-based fuel is a novel biological environment-friendly alcohol-based fuel, the calorific value is as high as 6,000-10,000 calories/g, and the combustion performance is good; and moreover, the alcohol-based fuel has high flash point and low volatility, and potential safety hazards in the prior art are eliminated. The alcohol-based fuel disclosed by the invention also has the characteristics of being safe and environment-friendly, reproducible, clean and sanitary, convenient to use, cheap and the like.

The invention discloses a detachable solid fuel suspension combustion experiment testing device and a detachable solid fuel suspension combustion experiment testing method, belonging to the technical field of a solid fuel combustion experiment. The testing device comprises a suspension combustion mechanism, a combustion data acquisition mechanism, a gas supply mechanism and an ignition mechanism; a base is arranged on a base bracket; the lower end hole of a primary combustion pipe is communicated and in detachable connection with the upper end hole of an inner pipe of the base; the lower end hole of a secondary combustion pipe is communicated and in detachable connection with the upper end hole of the primary combustion pipe; two porous metal plates are respectively arranged at the upper end hole of the inner pipe of the base and the upper end hole of the primary combustion pipe. The testing method comprises the steps of placing fuel; enabling the fuel to suspend; burning; acquiring combustion data; finishing the experiment. The device and the method mainly have the functions of realizing visualization of a combustion state, realizing uniform combustion at a suspended state, carrying out a combustion test on multiple samples for once and enabling the large-particle samples to be easily ignited.

The invention relates to an improvement of a fire coal combustion improver. The improved fire coal combustion improver is characterized by being prepared by compounding and mixing the following components: 20 to 30 weight percent of dolomite powder, 5 to 15 weight percent of dicyclopentadieny iron, 3 to 10 weight percent of chromium trioxide, 3 to 10 weight percent of manganese dioxide, 3 to 15 weight percent of magnesium nitrate, 3 to 15 weight percent of sodium dichromate and/or potassium dichromate, 3 to 18 weight percent of zinc oxide, 15 to 30 weight percent of active clay. The fire coal combustion improver has a plurality of functions of combustion acceleration, sulfur solidification, smoke abatement and the like; the thermal efficiency of a boiler can be improved by 3 to 8 percent; the coal-saving efficiency is up to 5 to 15 percent; the Ringelmann smoke blackness is less than 1; the total removal rate of SO2, NOx and the like is 25 to 60 percent, and the combustion improver has remarkable coal-saving and environmental-protection effect. Since the combustion effect is improved, the inferior coal (such as coal gangue), which is difficult to combust normally, is combusted and comes into play. After the long use, the boiler is not corroded, the scaling of the calcium sulfate in the boiler can be reduced, the operation safety of the boiler can be improved and the service life of the boiler can be prolonged.

The invention relates to a device, a system and a method for exhausting and heating under all operating conditions of a diesel engine, and belongs to the technical field of pollution control of tail gas particle. The heating device comprises a first-stage combustion chamber, a second-stage combustion chamber and a third-stage combustion chamber orderly connected in series with a shell, a whirlpool groove, a tapered spoiler, a spoiler groove, a triangular support of the tapered spoiler, a first-stage combustion oil supply pipe, a circular fuel oil evaporating pipe, a third-stage combustion oil supply pipe, an air intake guide cylinder, a fresh air guide cylinder, an exhaust tapered air inlet, an air inlet and an air intake baffle. An electronic control unit judges whether to regenerate by monitoring exhaust temperature and pressure at two ends of a particle catcher; when regeneration is needed, oxygen content in the exhausted air is judged, and when the oxygen content is lower than a preset value, an air pump is controlled to provide little air so as to reliably ignite under all operating conditions. The device, the system and the method have the advantages of low energy consumption, simple operation method, high combustion efficiency and reliable operation, and can work under all the operating conditions of an engine.

The invention discloses a fireproof interface agent for a polystyrene foam heat insulation material and a preparation method thereof. The fireproof interface agent is compounded by components A and B, wherein the mass ratio of the components A to B is 1: 1.2 to 1.4. The fireproof interface agent comprises the following raw materials in percentage by mass: the component A: 40 to 50 percent of butyl benzene emulsion, 35 to 40 percent of water glass, 1 to 3 percent of water glass stabilizing agent, 3.4 to 8 percent of ammonium polyphosphate fireproof aid, 10 to 15 percent of stable thickening agent and 0.2 to 0.4 percent of preservative; and the component B: 25 to 30 percent of water, 0.2 to 0.4 percent of preservative, 3 to 5 percent of antimonous oxide, 7 to 11 percent of chlorinated paraffin, 15 to 20 percent of fireproof paper fiber pulp, 3 to 5 percent of mica, 15 to 20 percent of aluminum hydroxide, 20 to 25 percent of fly ash, 0.5 to 1 percent of expanded perlite and the like. The fireproof interface agent has good flame-retardant property, and can greatly improve the combustion performance of the polystyrene foam heat insulation material.