19results about How to "Improve combustion characteristics" patented technology

The invention discloses a gas mixing control device for an LPG (Liquefied Petroleum Gas) generator set, which relates to the technical field of generator set operation control, and comprises a gas engine for realizing accurate mixing proportion control under the matching of a proportion dynamic response component, predicting the optimal gas mixing proportion and flow demand under the current working condition, and controlling the gas engine to operate according to the optimal gas mixing proportion and flow demand. When the propane content in the LPG is increased, the model prediction controller properly reduces the gas inflow and increases the air amount, sufficient combustion is ensured, the mixing proportion and flow can be rapidly corrected, the combustion process is rapidly recovered to be stable, it is ensured that the gas engine stably operates under different loads, the whole device forms flow balance and stable operation, and the service life of the gas engine is prolonged. Under different gas sources and LPG component differences, effective components actually participating in combustion are accurately judged, so that the needed gas and air amount is accurately calculated, accurate mixing proportion control is achieved, and meanwhile accurate control over the mixed gas mixing process is achieved under the cooperation of an adjusting control assembly.

The invention relates to the field of blast furnace pulverized coal preheating. A blast furnace pulverized coal preheating system comprises a coal injection workshop, a nitrogen heater, a common pulverized coal heater, a compressed nitrogen tank, a blast furnace, an oil storage tank, an expansion tank, a waste heat exchanger, a heat conduction oil pump, a PLC control system and a sound-light alarm device. Pulverized coal discharged from a coal injection workshop is heated in a common pulverized coal heater through waste heat of a blast furnace, and the heated pulverized coal enters the blast furnace to be combusted. The combustion characteristic of the preheated pulverized coal is remarkably improved, and the pulverized coal can be quickly combusted after entering a main combustion chamber of the blast furnace, so that the conventional three-section combustion process of heating, ignition and combustion is broken through.

The invention belongs to the field of flexible peak regulation and carbon reduction of thermal power generating units, and discloses a power station boiler oxygen-enriched hydrogen-ammonia-doped system and a working method thereof.The power station boiler oxygen-enriched hydrogen-ammonia-doped system comprises a boiler, and two combustors on the lower portion of the boiler are micro-hydrogen combustors; a combustion outlet of the micro-hydrogen combustor is connected with a lower hearth of the boiler, the hydrogen main gun is obliquely inserted into the inner side of a pulverized coal air chamber of the micro-hydrogen combustor, the hydrogen ignition gun is located in the middle of the pulverized coal air chamber of the micro-hydrogen combustor, and the hydrogen main gun and the hydrogen ignition gun are both connected with the hydrogen supply system. The boiler is provided with secondary air nozzles above and below each burner, the secondary air nozzle below the lowermost micro-hydrogen burner is arranged as a lower secondary air nozzle, the secondary air nozzle above the lowermost micro-hydrogen burner is arranged as an ammonia-doped secondary air nozzle, and the secondary air nozzle below the lowermost micro-hydrogen burner is arranged as an ammonia-doped secondary air nozzle. The secondary air nozzles above and below the uppermost micro-hydrogen burner are ammonia-doped secondary air nozzles, and ammonia gas inlets of the ammonia-doped secondary air nozzles are connected with an ammonia supply system. The problem of unstable combustion under low load can be solved by combining hydrogen-doped ammonia combustion and air oxygen-enriched combustion supporting.

The invention relates to the technical field of catalysts, in particular to a catalyst for fire coal and a preparation process thereof, and the catalyst comprises the following materials in parts by weight: 2-8% of rare earth nitrate, 5-18% of alkaline earth metal salt, 2-5% of alkali metal salt, 0.5-1% of copper-manganese composite oxide, 0.2-1.5% of transition metal salt, 0.1-0.3% of nonionic surfactant, 0.05-0.15% of organosilicon compound and the balance of water. The coal-fired catalyst is specially designed for a power plant, has excellent permeation and adsorption performance, solves the problem that the coal-fired catalyst is difficult to uniformly disperse in blocky coal, promotes full combustion of the coal in the power plant, improves the combustion rate and the burn-off rate, eliminates solid hazardous wastes from the preparation raw materials, ensures safety and environmental protection, and is suitable for industrial production. The power plant can be assisted to save coal resources, emission of harmful pollutants can be reduced from the source, and remarkable economic benefits and environmental benefits are brought to the power plant.

The invention relates to the technical field of combustion testing, in particular to a testing device for studying the combustion characteristic of nanofluid fuel. The device comprises an operation table, wherein a convenient combustion adjusting mechanism and a waste gas treatment assembly are mounted on the upper surface of the operation table; the convenient combustion adjusting mechanism comprises a storage tank and a combustion chamber, a pump body is arranged between the storage tank and the combustion chamber, a connecting pipeline is connected between the storage tank and the pump body, a pressure adjusting assembly is arranged between the pump body and the combustion chamber, and an outlet of the combustion chamber is connected with a waste gas treatment assembly; a combustion component and an igniter are arranged on the top of the inner side of the combustion chamber. According to the pressure adjusting assembly, fuel flowing and gas supply can be effectively controlled, the combustion process is stable, accurate test conditions are achieved, the reliability of test results is improved, and fuel performance can be deeply analyzed conveniently.

The invention is suitable for the technical field of coal, and provides a high alkali metal coal slag adhering method, which comprises the following steps: step 1, analyzing the occurrence form and content of alkali metal: firstly, analyzing the occurrence form and content of alkali metal in coal, including four forms of water-soluble alkali metal, ammonium acetate solubility, diluted hydrochloric acid solubility and insoluble alkali metal, according to the invention, the slag adhering problem of the high alkali metal coal is reduced, the combustion efficiency and environmental protection property of the coal are improved, the combustion and gasification efficiency of the coal is improved, the environmental pollution is reduced, through reasonable coal blending, the utilization efficiency of coal resources is improved, the production cost is reduced, the low alkali coal can be effectively utilized to improve the combustion characteristics of the high alkali coal, and the slag-bonding and contamination problems of a boiler are reduced; meanwhile, safe and economical operation of the boiler is guaranteed, the components of the coal ash can be effectively regulated and controlled, the utilization value of the coal ash is improved, the environmental influence is reduced, cyclic utilization of resources is achieved, and the slag adhering phenomenon of the high alkali metal coal in the combustion and gasification process can be more accurately predicted and controlled, so that effective prevention and solution measures are taken.

The present invention belongs to the field of coal energy technology, and in particular to a catalytic improver for raw coal combustion, which is composed of a mixture of metal oxides, iron-containing compounds, metal carboxylates, alumina, rare earths and water, and is characterized in that: the metal oxides include Al 2 O 3 , Fe 2 O 3 , Fe 3 O 4 and MnO 2 ; Iron compounds include FeCl 3 and FeCl 2 ; Metal carboxylates include Mg(CH 3 COO 2 and Na 2 C 2 O 4 ; Alumina is Al 2 O 3 ·3H 2 O; rare earth is La(NO 3 ) 3 The present invention can effectively improve the combustion characteristics of coal, greatly improve the reactivity and combustibility of coal, thereby improving the combustion efficiency of raw coal, reducing energy consumption, and effectively reducing SO in exhaust gas. 2 , CO, and NOx contents, thereby achieving the effect of energy conservation and emission reduction. During boiler operation, the boiler thermal efficiency is increased by 3.11%-3.98%, and the coal saving rate reaches 4-12%, which has good economic benefits.

The present invention relates to the field of combustion control technology, and in particular to a method and device for optimizing the combustion control of low calorific value industrial waste gas. The method comprises the following steps: obtaining waste gas composition data, and calculating the waste gas calorific value according to the waste gas composition data to obtain waste gas calorific value data; obtaining combustion chamber data, and generating air-fuel ratio parameters according to the combustion chamber data and the waste gas calorific value data to obtain air-fuel ratio parameter data; performing waste gas pretreatment according to the air-fuel ratio parameter data and the waste gas composition data to obtain waste gas pretreatment data; performing multi-stage combustion operations according to the waste gas pretreatment data to obtain waste gas combustion data. The present invention realizes intelligent management of the combustion process, maximizes the combustion potential of low calorific value waste gas through multi-stage combustion and segmented control technology, and realizes source control of pollutants, reduces emissions, and improves the overall performance of the combustion system through real-time monitoring and optimized control.

The utility model relates to a kind of porcelain tunnel kiln production line, wherein porcelain tunnel kiln production line includes the tunnel kiln main part for firing porcelain and the multiple energy-saving efficient combustors of interval arrangement along the length direction of tunnel kiln main part being arranged on tunnel kiln main part, energy-saving efficient combustor includes outer sleeve, inner tube of insertion in outer sleeve and branch pipe of being arranged in the gap between outer sleeve and inner tube, the first side of the outer sleeve is equipped with the first inlet of the air into gap, the first end of the inner tube has the second inlet of the natural gas into, the first end of the branch pipe has the third inlet for the hydrogen gas containing into, the middle part of the inner tube is equipped with the fourth inlet of the second end port communication of branch pipe, the wall of tunnel kiln main part is equipped with channel, energy-saving efficient combustor is arranged in channel, and this porcelain tunnel kiln production line uses energy-saving efficient combustor, it is favorable to improve its combustion efficiency, reduce combustor use cost.

The utility model discloses a kind of combustion device and combustion system, comprising: hearth, hearth provides space for material combustion;Primary air chamber, primary air chamber is used to form primary air;Air distribution plate, hearth is communicated with primary air chamber by air distribution plate;Ammonia gas pipeline, ammonia gas pipeline is located in hearth and close to air distribution plate;Ammonia gas air cap, ammonia gas air cap is used to communicate ammonia gas pipeline and hearth, and the gas in the hearth is guided, the surface of ammonia gas air cap has ammonia cracking catalyst layer, ammonia cracking catalyst layer can at least part of ammonia gas that passes through ammonia gas air cap is cracked into nitrogen and hydrogen. Since the minimum ignition energy of hydrogen is lower than that of ammonia and the combustion temperature is high, hydrogen is more easily combusted than ammonia, which can improve the combustion characteristics in the hearth and enhance the effect of ammonia combustion, thereby reducing ammonia escape, while allowing more ammonia to react with nitrogen oxides, achieving the purpose of inhibiting the formation of nitrogen oxides.

The invention relates to the technical field of coal blending combustion of ammonia gas, in particular to a system and a method for blending combustion of ammonia gas in an opposed firing boiler. The system comprises a boiler body, a coal supply system, an ammonia gas preheating system and an ammonia gas pre-decomposition system, wherein the coal supply system comprises an ammonia gas pre-decomposition device, a premixing device and a secondary fan; an air preheating unit inlet of a tail flue of the boiler body is connected with a secondary fan; an outlet of the air preheating unit is connected with the premixing device; an outlet of the ammonia preheating system is connected with the ammonia pre-decomposition device, and a first outlet of the ammonia pre-decomposition device is connected with the premixing device; the premixing device is connected with a secondary air nozzle of the combustion unit; the coal supply system is connected with a second inlet of the ammonia gas pre-decomposition device, and the ammonia gas pre-decomposition device is connected with the primary air nozzle of the combustion unit. According to the method, the problems that the cost is increased or the system complexity is improved in the existing ammonia-coal mixed combustion technology, and the cost is high and the combustion stability is difficult to guarantee in the coal-fired boiler transformation process are solved.

This application discloses a zero-carbon emission cement production device and method based on hydrogen energy utilization. The production device includes: a hydrogen production system, a fuel cell system, a waste heat recovery system, a cement clinker calcination decomposition furnace system, a cement clinker calcination rotary kiln system, a grinding system, and a methanol synthesis system. This application uses hydrogen to partially replace the kiln fuel, which can achieve carbon emission reduction with minimal changes to the existing cement production line technology and at a relatively low modification cost. Addressing the high energy consumption and high carbon emissions in the cement industry, this application optimizes the material and energy flow throughout the entire cement production process, achieving the recycling of materials and the cascade utilization of energy, ensuring the low-carbon and environmentally friendly nature of the entire production method.

The application belongs to the technical field of nanocomposites, and particularly relates to a core-shell type thermite, a preparation method and application in a biomass blasting device. The preparation method comprises the following steps: S1, adding fly ash into a hydrochloric acid solution to dissolve the fly ash, then filtering to obtain a filtrate, adding a sodium hydroxide solution into the filtrate, then performing stirring, filtering and drying treatment to obtain a precipitate, calcining the precipitate to obtain iron oxide particles for standby; S2, adding aluminum powder and boron powder into an organic solvent to perform ultrasonic mixing, then performing heating and stirring to volatilize the organic solvent to obtain an aluminum-boron compound, and drying for standby; S3, adding the iron oxide particles, the aluminum-boron compound and an adhesive into an acetone solution to mix uniformly to obtain a mixture, performing stirring and ultrasonic treatment on the mixture to obtain a suspension; adding a polyvinyl alcohol emulsifier into deionized water and performing heating and stirring to obtain an emulsion; S4, in a high-speed dispersion homogenizer, adding the suspension dropwise into the emulsion to wrap the suspension in the emulsion to obtain an oil-in-water emulsion, and performing evaporation, filtering, washing and drying treatment on the oil-in-water emulsion to obtain the core-shell type nano thermite.

The invention relates to a treated candle wick which is treated by coating or adding chemical agents. Such treated candle wick has the characteristics that make the wick sufficiently hard, enabling the candle wick to be positioned in a straight (or nearly straight) position within a candle mold, for use in candle making processes, and during surrounding and use of a candle by a candle body (e.g., candle burning), and also has flexibility so that after application of a force, the wick does not fall off from the candle mold. The wick will return (rebound) to its straight or nearly straight position. There is no need to apply tension to the wick or to apply tension using any tool to keep it straight in the mold. According to the invention, one of the most important bottlenecks in high-speed filling is solved by eliminating the fixing / straightening of the candle wick.

The utility model discloses a combustion chamber of a hydrogen internal combustion engine, which is characterized in that the inner wall of the combustion chamber, which is positioned at a cylinder cover, consists of two inclined planes which are in opposite roof shapes and two spherical surfaces which are oppositely arranged, and the same sides of the two inclined planes are respectively connected with a spherical crown; the inclined plane is positioned on the inner wall of the cylinder cover; an intake valve, two exhaust valves and a spark plug are arranged on the cylinder cover; two intake valves are arranged on one inclined plane, and two exhaust valves are arranged on the other inclined plane; the spark plug is arranged at the position eccentric to one side of the exhaust valve relative to the central axis of the combustion chamber, the spark plug is parallel to the central axis of the combustion chamber, and the tail end of the spark plug extends into the combustion chamber. According to the utility model, mixed gas of hydrogen and air can be charged into an internal combustion engine cylinder through the intake valve to generate turbulent flow; and the in-cylinder hydrogen-air mixing effect and the in-cylinder turbulent vortex space-time distribution are enhanced.

The invention discloses a support plate of an RBCC (Radial Basis Combined Cycle) engine using methane fuel, which comprises a central support plate, the central support plate is provided with a gas leading-in hole from top to bottom, the gas leading-in hole is communicated with an external methane and oxygen mixing chamber, the right side of the central support plate is provided with a rocket hole from right to left, the left end of the rocket hole is communicated with the right side of the gas leading-in hole, and the right end of the rocket hole is communicated with the right side of the gas leading-in hole; the gas guide hole is used for guiding mixed high-temperature gas of methane and oxygen entering from the gas guide hole into the combustion chamber; a methane inlet hole is formed in the top of the central supporting plate from top to bottom, and methane outlet holes communicated with the methane inlet hole are formed in the side walls of the two sides of the central supporting plate; the methane inlet hole is communicated with an external methane gas source, and the methane outlet hole is used for spraying methane entering the central support plate from the methane inlet hole into the isolation section, so that the methane enters the combustion chamber for combustion under the ejection of mixed high-temperature gas of methane and oxygen; according to the invention, methane fuel can be used, so that the RBCC engine can work in a wide range.

The present invention relates to the technical field of gasoline, particularly to a sustainable lead-free aviation gasoline fuel composition, which comprises the following components by volume: 5-20 parts of toluene; 10 to 25 parts of xylene; 5 to 10 parts of aniline; 20-55 parts of an alkane mixture; 5-15 parts of sustainable aviation fuel; and 2-5 parts of fuel ethanol. The method for preparing the sustainable lead-free aviation gasoline fuel composition comprises the following steps: firstly mixing a mixture of toluene, xylene and alkane and sustainable aviation fuel, then adding aniline and fuel ethanol, and stirring for 1 hour to complete mixing of the lead-free aviation gasoline fuel composition. The lead-free aviation gasoline fuel composition has the characteristics of high octane number, low sulfur content, low oxygen content and the like, and all the components are generated in a sustainable production mode, so that the burden of wastes on the environment is reduced, and the influence of carbon emission on the environment is reduced.

The invention discloses environment-friendly high-performance anhydrous stemming for an iron-making blast furnace and a preparation method of the environment-friendly high-performance anhydrous stemming, belongs to the technical field of refractory materials, and is used for solving the problems that the bonding strength, the high temperature resistance, the green and environment-friendly performance and the like of anhydrous stemming in the prior art need to be improved due to the fact that the anhydrous stemming is modified by adopting a binding agent. The ceramic material comprises the following components in parts by weight: 30-40 parts of bauxite, 5-10 parts of silicon nitride micro powder, 20-30 parts of silicon nitride, 3-5 parts of silicon iron nitride micro powder, 6-10 parts of composite inorganic micro powder, 5-10 parts of modified coal tar, 1-2 parts of carbon black, 3-5 parts of carbon nanotubes and 5-10 parts of a modified adhesive. The coal tar is modified by the surfactant, the flammability of the coal tar is improved, and the modified adhesive prepared by modifying polyurethane with diketoxime and nano lignin powder has the characteristics of high adhesiveness, environment friendliness and high temperature resistance.

The present invention relates to the technical field of a plunger homogeneous charge compression ignition engine. The plunger homogeneous charge compression ignition engine is characterized by comprising an internal gear (11), a secondary crankshaft gear (10), a primary crankshaft (27), a secondary crankshaft (9), a secondary crank pin (26), an engine plunger (24), and a floating bowl (7). The secondary crankshaft (9) is rotatably mounted in an eccentric shaft hole of the primary crankshaft (27), and the eccentricity of the eccentric shaft hole is the same as the rotation radius of the secondary crank pin (26). The gear ratio of the internal gear (11) and the secondary crankshaft gear (10) is 1 / 2, the internal gear (11) does not rotate, and the gear meshing makes the secondary crankshaft (9) rotate at twice the speed of the primary crankshaft (27), and rotate in the opposite direction, and the secondary crank pin (26) drives the engine plunger (24) to move linearly. When the engine plunger (24) moves to the vicinity of the top dead center, compressed air is injected into the area below the floating bowl (7) above the plunger, and the floating bowl (7) moves upward rapidly to compress the combustion chamber rapidly, so that the air-fuel mixture in the combustion chamber is compression-ignited.