177results about How to "Improve combustion characteristics" patented technology

The invention discloses a processing method for biomass solid molding fuel, which pertains to the technical field of solid fuel and aims at solving problem of comprehensive use of energy and biomass energy in rural areas. The technical proposal is as follows: biomass energy such as crop straws, shrub forest, forestry residues and the like are used as raw materials, and the secondary crushing technique and the mixed technique combining continuous feeding with adjustable feeding are adopted, therefore, two types of solid fuels, namely, block-type and granular fuels, can be produced. The technical proposal comprises three stages namely, pre-treatment of raw materials, solid molding and auxiliary assorting, and the specific working procedures comprise raw material cracking, drying, conveying, mixing, feeding, molding, cutting, cooling and measuring and packaging and adding a compulsory ventilating dust-removing system during the whole process. The processing method for biomass solid molding fuel solves the problem of diversification of biomass raw materials, and the biomass solid fuel production line constructed by adopting the processing method realizes the industrial continuous and stable production, solves the problems of high energy consumption and low production efficiency in the existing small workshop-style production, and is also beneficial to solving the rural energy problem and improving the rural environment.

The invention discloses turbine-based combined cycle engine super-combustion chamber. Key parts of the super-combustion chamber comprise a shunt ring, a rear area-variable deflation valve, a flow guide tongue piece, a square lobe mixer, a first area fuel ejector, a center cone, a second area fuel injection ring, an evaporation tube flame stabilizer, a heat-isolating screen, a super-combustion chamber cylinder, an outer extending groove-width-variable radial flame stabilizer and an inner extending radial flame stabilizer. An internal flow field of the super-combustion chamber is reasonably distributed, the phenomenon of backflow from a punching duct to a turbofan duct can not occur, flow separation can not occur in the square lobe mixer, and the evaporation tube flame stabilizer can achieve soft ignition of the super-combustion chamber. The whole super-combustion chamber is high in mixing efficiency, little in cold flow resistance, high in combustion efficiency, reasonable in temperature distribution, and capable of meeting use requirements in a whole flight envelope of the super-combustion chamber in each work state and the requirement for boost of an turbofan ramjet.

The invention discloses solid fuel which is mixed by organic waste and sludge and a process for preparation. The solid fuel comprises the organic waste: 25%-55%, the sludge: 20%-50%, coal powder: 20%-50%, combustion improver: 0.15%-0.25% and desulfurization dechlorinating agent 0.5%-2%. The process for preparation comprises three stages of raw material preparation, molding and consolidation. The invention is tested by the solid fuel mechanical strength, burning characteristics, pollution control and the like. The solid fuel which is mixed by the organic waste and the sludge and prepared by the manufacturing process of the invention is comparatively ideal clean fuel with higher mechanical strength and can satisfy long-distance transportation with the falling strength more than 99%, the invention is the solid fuel with strong mechanical strength, good water resistance, excellent combustion characteristics, strong thermal stability and non pollution and can be extended to be applied in civilian uses and industrial sectors. The invention can also save a great amount of non-renewable fossil fuels such as petroleum, coal and the like with good social and environmental benefits.

Fuel additives are disclosed for high-asphaltene carbonaceous fuels such as residual fuel oil or coal. Such additives provide improved combustion characteristics. Such improved combustion characteristics include one or both of improved efficiency and decreased emissions of pollutants. In particular, the fuel additives include an extract from a plant such as fescue, alfeque, or alfalfa, and optionally, an organometallic compound. The use of a fuel additive including both a plant extract and an organometallic compound is particularly useful in improving the combustion characteristics of fuels with particularly high asphaltene content.

The invention discloses a two-component variable-thrust rotary detonation rocket engine based on a pintle injector. The two-component variable-thrust rotary detonation rocket engine based on the pintle injector comprises the pintle injector, a rotary detonation combustion chamber and an exhaust nozzle which are sequentially and coaxially arranged in the axial direction; the pintle injector comprises a center rod inner nozzle, a nozzle adjusting body and an injector shell which are sequentially and coaxially arranged from inside to outside in a sleeving mode; a fuel injection runner is arranged in the center of the center rod inner nozzle, a plurality of fuel injection openings are formed in the head of the center rod inner nozzle in the circumferential direction, and a broken-line-shaped oxidizing agent runner is formed between the outer wall face of the inner side of the nozzle adjusting body and the inner wall face of the injector shell; and the nozzle adjusting body can slide in the axial direction, and therefore the injection area of the fuel injection openings and the sectional area of the oxidizing agent runner are adjusted. According to the two-component variable-thrust rotary detonation rocket engine based on the pintle injector, under the condition that the equivalence ratio is not changed, the flow of a two-component propellant can be changed, thrust can be generated and changed, a fuel flowing area can be stabilized and the combustion rate of fuel can be increased by effectively utilizing a backflow area at the head of a pintle, fuel waste is reduced, and the propellant is saved.

The invention discloses a process for further co-producing LNG (Liquefied Natural Gas) by using pyrolysis gas generated after low-rank coal is used for generating power in a power generation system. According to the process, semi-cokes generated by coal in a pyrolyzing furnace and separated hot ash are fed into a power generating boiler system so as to be combusted and utilized, the generated power is used for LNG in the subsequent process, raw gas and fine ash particles generated through pyrolysis enter into a separation system, and products with high additional values can be extracted from the separated tar. The process specifically comprises the following steps of pressurizing the raw gas and then entering into a pretreatment process; removing impurities such as dust, oil tar, naphthalene and H2S in the raw gas; compressing pre-purified gas and then entering into units such as a pyrolysis gas deep purification unit, a methanation unit and cryopenic separation and liquidation units, thereby preparing clean energy liquefied natural gas which is short in China. According to the invention, coal pyrolysis and gasification are organically combined with gas, chemical, electric and heat production processes on the basis that heat supply and power generation are carried out by taking semi-cokes as solid fuels, so that graded transformation and step-by-step extraction of coal as well as economic benefit maximization are realized, the energy utilization efficiency is increased, and the economical efficiencies of thermoelectricity enterprises are increased.

The invention relates to a method for operating a fuel-injected, especially a directly fuel-injected, reciprocating internal combustion engine. Said engine comprises at least one outlet valve per cylinder, communicating with an exhaust gas installation, and at least one inlet valve, communicating with an air inlet installation, and means for increasing the boost pressure in the air inlet installation. The method is characterized in that a control device for variably adjusting at least the opening times of the inlet valves is provided and that in the lower engine speed range the inlet opening times of the inlet valves can be adjusted via the control device in such a manner that there is a valve overlap with the closing time of the corresponding outlet valves, thereby scavenging the cylinder with fresh charge air before charge exchange in the area of top dead center.

The invention discloses a composite fuel production method, which is characterized by the following: mixing the raw coal powder, vegetable fuel powder, sulfur-fixed agent, adhesive, hardener and oxygenation agent according to proportion with water; producing particle through particle moulding equipment; drying naturally into product. The invention reduces the environmental pollution, which is fit for industrial and civil fuel heat supply device.

The invention discloses an acquisition method of a combustion characteristic under different circumference air quantities after boiler improvement, and belongs to the technical field of coal-fired boilers. According to the method, after meshing is carried out on a corner tangential firing boiler added with SOFA air, a structured grid model of the boiler is established, and combustor parameters, boundary condition parameters and coal powder parameters of the boiler are acquired; then, a mathematical model is established on the foundation to carry out combustion analog computation, so that the combustion characteristic of the boiler under different circumference air quantities is acquired. With the method, the combustion condition inside the boiler can accurately reappear, and total information of combustion condition inside the boiler is acquired, thus guidance is provided for low-nitrogen improvement added with SOFA air for the boiler, and comprehensive evaluation is carried out on the effect after low-nitrogen improvement.

The invention belongs to the technical field of ammonia decomposition, and particularly relates to a supercharged engine and an ammonia fuel hybrid power generation system. The supercharged engine comprises an internal combustion engine, a membrane separation assembly and an ammonia decomposition reaction assembly, wherein first gas is compressed and then enters the membrane separation assembly, nitrogen-rich gas and oxygen-rich gas are obtained through separation, the oxygen-rich gas exchanges heat with liquid ammonia from a liquid ammonia storage tank through a vaporizer assembly, then the oxygen-rich gas enters the internal combustion engine, and the liquid ammonia exchanges heat with the oxygen-rich gas through a vaporizer and then enters the ammonia decomposition reaction assembly to be subjected to ammonia decomposition reaction; tail gas generated by the internal combustion engine enters a turbine to do work, and the turbine drives a first compressor to compress the first gas; the first gas enters the membrane separation assembly after being compressed, oxygen-nitrogen separation or hydrogen-oxygen-nitrogen separation is achieved, the oxygen-rich gas enters the internal combustion engine, and the combustion characteristic is improved; and meanwhile, the oxygen-rich gas and the liquid ammonia exchange heat in the vaporizer, the temperature of the oxygen-rich gas is reduced, the temperature of the liquid ammonia is increased, the liquid ammonia is gasified into gas, and the inflation coefficient of the internal combustion engine is increased.

The present invention relates to a coal-fired boiler natural gas secondary combustion nozzle, and is characterized by that the uniformly-layered arranged oblique-jet holes are cut on the semi-periphery of the jet pipe, and the included angle of the axis of oblique jet hole and axis of jet pipe is 15-75 deg., and on the end cover of the jet pipe the axial jet holes parallel to the axis of jet pipe are uniformly cut. Said invention can completely burn the natural gas, and does not produce fire-retardant carbon black.

The invention discloses methanol gasoline for a vehicle and a preparation method thereof. The methanol gasoline is prepared from the following raw materials in parts by weight: 60-70 parts of methanol, 15-25 parts of 90# gasoline, 10-15 parts of dipropylene glycol methyl ether acetate, 5-10 parts of tert amyl methyl ether, 5-10 parts of dimethyl carbonate, 4-8 parts of diethylene glycol dimethyl ether, 3-6 parts of 2,2-dimethoxypropane, 1-2 parts of ferrocene, 0.5-1.5 parts of methyl cyclopentadiene tricarbonyl manganese, 0.8-1.4 parts of 2,5-di-tert-butyl hydroquinone, 0.4-0.8 part of glycerol monolaurate, 0.5-1 part of sodium petroleum sulfonate, 0.3-0.6 part of N-Polyoxyethylated-N-tallow-alkylamine, 5-10 parts of wood tar, 3-6 parts of isopropanol, 2.5-4.5 parts of fish meal, 2-3 parts of bone meal, 1-2 parts of stearic acid and 0.5-1 part of urotropine. The methanol gasoline disclosed by the invention is favorable in combustion characteristic, high in utilization ratio, favorable in anti-detonating quality, low in corrosivity, high in safety and reliability, energy-saving and environment-friendly, can be used instead of any of 90#, 93#, 97# and 98# gasoline for a vehicle, is novel environment-friendly alternative fuel, and can reduce pollutant emission and carbon emission; and the combustion emission of the methanol gasoline meets the standards in Europe and America. The methanol gasoline has excellent economic benefits and far-reaching social benefits.

The invention relates to a part control phase change air preheating system and an air preheating method. The part control phase change air preheating system and the air preheating method well solve the coupling problem of traditional air preheater low temperature corrosion and heat efficiency, an operating method of the air preheating system can be timely adjusted according to actual operation parameters, adjusting capability is greatly increased, and not only is economy and high efficiency of a thermal circulation system guaranteed, but also security and adaptability of the air preheating system can be improved.

The invention relates to a method for operating at least one precombustion chamber-fired internal combustion engine (1), in particular a stationary gas Otto cycle engine, having a pilot chamber (2) and a main combustion chamber (3) associated with the precombustion chamber (2), wherein a gas mixture is fed to the precombustion chamber (2) as flushing gas (S), wherein a synthesis gas (R) generated in a fuel reformer (4) and a fuel (B2) from a fuel source are fed to the flushing gas (S) and wherein a fuel (B1) and at least one further substance stream (D, L, A) are fed to the fuel reformer (4) for the reforming process, wherein at least one operating parameter of the at least one internal combustion engine is monitored, wherein in accordance with a change in the at least one operating parameter the chemical composition of the flushing gas (S); is modified by changing the mass stream of the at least one further substance stream (D, L, A).

An in-vehicle engine control apparatus allowing split injection frequency or split injection of fuel while preventing a driving switch element for fuel injecting electromagnetic coils and a boosting switch element for generating a boosted high voltage from being overheated. An operation control circuit portion has reference data of measured environmental temperature vs allowable engine rotational speed with a selected value of the split injection frequency being a parameter, and determines the selected value having, as an upper limit, a split injection frequency which makes the internal temperature of the boosting switch element or a rapidly exciting switch element a predetermined allowable limit value in association with the present environmental temperature detected by an average environmental temperature detection element in a case and the present engine rotational speed detected by an engine rotation sensor.

The invention discloses a gas turbine main combustion chamber multi-channel diffuser with the intelligently adjustable diffusion ratio, and belongs to the technical field of gas turbine combustion. The diffusion ratio flowing through an inner diffusion channel and an outer diffusion channel can be intelligently set by adjusting the expansion angle of a cone located in a diffuser casing, the target diffusion ratio of each channel is set according to different working conditions, so that the sum of friction loss and separation loss of the diffuser is minimum; in addition, the multi-channel diffuser guides two air flows to a designated area of the head of the double-ring-cavity combustion chamber, the air flows of the main combustion stage and the pre-combustion stage of the double-ring-cavity combustion chamber can be intelligently distributed by adjusting the position of a flow dividing cone located in a diffuser casing, according to different working conditions, the set oil-gas ratio of each area is obtained, so that high combustion characteristics and low pollution emission are realized.

The invention discloses a method for increasing methane yield by assisting anaerobic microorganism treatment through electrolysis. According to the method, electrolyzed water is adopted to increase the methane yield, voltage of the electrolyzed water ranges from 1.8V to 12V, a non-precious metal catalytic material such as stainless steel, graphite, a graphite-base material, nickel, steel, metal alloy or metallic oxide is adopted to serve as an electrode material of the electrolyzed water, and a current density of the electrolyzed water is not larger than 0.01A/cm<2>, preferably 0.01-0.05A/cm<2>. The method has the advantages that within an appropriate voltage range, growth of microorganisms cannot be damaged, the methane yield can be increased, and methane quality can be improved; oxygen generated during electrolysis combines with hydrogen sulfide generated during microorganism degradation, so that the hydrogen sulfide is eliminated, and quality of the methane is improved; generated hydrogen combines with carbon dioxide under the action of the microorganisms so as to revert to methane, so that the methane yield is increased, a hydrolysis rate of organisms is increased, and a gas generating rate of the methane is increased.

The invention relates to an in-cylinder direct injection double-gas-fuel internal combustion engine capable of realizing ultra-lean combustion and a control method, aims to solve the problems that combustion is unstable in an ultra-lean-combustion mode of a gas fuel spark ignition type internal combustion engine, the oil consumption is high and emission is heavy under the work conditions of cold start and small load and the like and develops a spark ignition type in-cylinder direct injection double-gas-fuel internal combustion engine capable of realizing ultra-lean combustion and a control method of the internal combustion engine. The internal combustion engine adopts an internal combustion engine technology combining in-cylinder direct injection and gas inlet channel injection based on double gas fuel, the internal combustion engine is provided with a gas flow control device which cooperates with a piston roof in a special shape, and accordingly, good mixed gas layering is realized. According to the special combustion characteristic of gas fuel, ultra-lean mixed gas in higher compression ratio can be adopted; gas flow movement of the mixed gas entering a cylinder is controlled, meanwhile, gas inflow is increased, ultra-lean combustion of the mixed gas in the cylinder is realized, the heat transfer loss is reduced, the heat efficiency is improved, and oil consumption and pollutants are reduced.

The invention relates to medical waste separation, recovery, and incineration processing method, comprising the following steps: 1. waste collection: collecting by adopting an enclosed way; 2. separation: the chunk material and bulk material which can be recycled separately are separated out; 3. smashing: all the material being processed collectively is smashed under the enclosed condition; 4. sterilization: all the smashed material is sterilized; 5. sorting: the medical waste is divided into two categories in a mechanical way according to the proportion of the material, the first is lighter material with the main ingredients being fiber and other organics, and the second is heavier material with the main ingredients being metal, sandrock and other mineral substances, the lighter material is dried and smashed to form incineration material; and 6. incineration: coal power is added into the incineration material as a combustion accelerator and fuel oil is sprayed into an incineration furnace as a second combustion accelerator. The invention is conducive for reasonable utilization of material in the medical waste and the reduction of energy consumption.

The invention discloses an afterburner adopting planar fan nozzles for oil supply, and belongs to the field of aero-engines. The afterburner adopting the planar fan nozzles for oil supply is characterized in that supporting plates are arranged on an oil supply device in the afterburner, and are uniformly arranged along the circumference of the afterburner in the perpendicular direction; and oil spraying rods are arranged on the inner sides of the supporting plates in the radial direction, the planar fan nozzles are arranged on the side walls of the oil spraying rods in the radial direction, and the opening cross section of each planar fan fuel nozzle is V-shaped. According to the design of the afterburner adopting the planar fan nozzles for oil supply, the fuel spray extending angle is enlarged, the number of the nozzles is reduced, the diameter of each nozzle is increased, and meanwhile, the fuel radial and circumferential concentration distribution is more uniform, so that reliable and stable combustion of the afterburner is facilitated, and the problems in the prior art are solved.

The invention discloses a method for recovering crude oil in petroleum oil sludge and recycling residual mud and sand. The method comprises the steps of A, pretreatment-crude oil extraction-co-incineration: drying the oil sludge to a constant weight at a certain temperature and measuring a heat value of the oil sludge; B, a crude oil extraction process: mixing the oil sludge with an organic solvent according to a certain weight ratio, stirring at a certain temperature, and filtering to obtain oil phase and raffinate phase oil sludge; C, an organic solvent recovery process: selecting a boiling point of the organic solvent, recovering the organic solvent at 100 DEG C under the normal pressure through a distillation recovery device, and recycling the organic solvent; and D, a co-incineration process: drying the raffinate phase oil sludge, mixing the dried raffinate phase oil sludge with municipal sludge ash according to a certain ratio, measuring a heat value of a mixture, and performing incineration at 800-1,000 DEG C. The method is easy to implement and simple and convenient to operate; the crude oil subjected to extraction is recycled; the residual raffinate phase oil sludge still can take effects and is subjected to co-incineration together with the municipal sludge ash; and the heat value of the oil sludge is fully utilized.