65 results about "Powder burn" patented technology

The invention relates to a making method of green fluorescent powder, which comprises the following steps: mixing zinc blend as host material, cupric nitrate as activating agent, aluminum fluoride as coactivator, chlorauric acid, barium iodide as auxiliary solvent and sulfur in the blending machine to produce phosphor powder burning material; putting the phosphor powder firing material into the quartz container with the sulfur and active carbon to burn in the tunnel with protecting gas of N2; removing non-luminous or luminous abnormal powder and impurity from the phosphor powder under ultraviolet lamp to obtain the green emitting phosphor. The invention uses a fluxing agent material of the barium iodide and a new coactivator material of the aluminum fluoride, which improves luminous property of the phosphor powder with reducing particle size distribution and reduces usage of the coactivator of chlorauric acid at the same time.

The invention discloses a preparation method for a ceramic powder-reinforced metal-matrix welding layer. The preparation method for the ceramic powder-reinforced metal-matrix welding layer comprises the following steps: carrying out pretreatment on a metal matrix, an alloy powder and a ceramic powder; setting plasma surfacing process parameters according to the material of the metal matrix, and determining a powder feeding temperature of a powder feeding device; placing the metal matrix on a workbench, starting up a plasma surfacing machine and the powder feeding device, enabling the powder feeding device to automatically travel, detecting the temperature distribution of a metal molten pool and transmitting a temperature field to a control device for the powder feeding device by a temperature induction device, calculating the position of a set powder feeding temperature in the molten pool to determine the position of the powder feeding device by the control device, and enabling the ceramic powder to fall into a specified temperature area in the molten pool by adjusting the included angle of an outer powder feeding pipe; and controlling the outer powder feeding pipe of the powder feeding device to carry out pendular movement. According to the preparation method for the ceramic powder-reinforced metal-matrix welding layer, determination for a powder falling point of outer powderfeeding is facilitated; and meanwhile, the problems of serious powder burning loss and low powder utilization rate are solved.

The present invention is one burning apparatus for the composite burning of biomass and coal powder and re-burning and denitrifying of biomass. The burning apparatus includes hearth, main coal powder burning area inside the hearth, main nozzles and biomass nozzles installed on the four corner of the hearth. The present invention has the following advantages: lower NOx exhaust rate, burning out of biomass fuel, large scale utilization of biomass, reduced room temperature CO2, and lowered SOx exhaust and simple apparatus structure.

The lime calcining rotary furnace has one cylindrical furnace body, one calcining sieve barrel set concentrically inside the cylindrical furnace body, and several partition boards set homogeneously between the calcining sieve barrel and the cylindrical furnace body. During the rotation of the furnace body, crushed limestone is distributed in the channels the calcining sieve barrel and the partition boards form, heated homogeneously with the flame of the coal powder burning sprayer, and made to shift toward the relatively lower discharge port. The present invention has raised heat energy utilization and continuous operation and is superior to fixed kiln.

The invention discloses a numerical simulation method for interaction of coal powder particles in burning, belonging to the technical field of computer numerical simulation. According to the characteristics of burning of the coal powder particles, the method is characterized in that on the basis of calculation of an existing mathematical model of fluid mechanics software FLUENT, FLUENT UDF and FLUENT Scheme are used for hybrid programming, and user-customized models, namely, a coal powder particles interaction model (a particle construction form, a particle mass change model, a particle size dynamic change model and a volatile element precipitation model) and a mass change storage mechanism, are coupled, so that numerical simulation of interaction of the coal powder particles in burning is realized. Experiments show that change rules of coal powder particle temperature and so on obtained through the numerical simulation method are generally consistent with experiment data. Through adoption of the method, a real, objective interaction mechanism of coal powder particles in burning is disclosed conveniently and efficiently, thereby providing powerful theoretical basis and technological support for improvement and optimization design of the coal powder burning technology.

A wall-type arranged two-stage burn-up air device relates to a wall-type arranged burn-up air device which can solve the problems of low coal powder burn-up degree, high fly ash carbon content and high attemperation water flow for existing wall-type arranged boilers caused by the adoption of a single-stage burn-up air device arrangement mode that does not adapt boiler loads and coal quality fluctuation. The device comprises a plurality of first-stage burn-up air, a plurality of second-stage burn-up air, a plurality of first-stage burn-up air bellows, a plurality of second-stage burn-up air bellows, a plurality of first-stage burn-up air doors, and a plurality of second-stage burn-up air doors; a lower end of a hearth wall body is connected with an upper end of a cold ash hopper; the plurality of swirl burners are arranged on the wall body in a multilayer mode; the plurality of first-stage burn-up air are arranged on the wall body and are located above the swirl burner at the top layer; the plurality of second-stage burn-up air are arranged on the wall body and are located above the first-stage burn-up air; the plurality of first-stage burn-up air are disposed in the first-stage burn-up air bellows. The invention is applicable to boilers.

The invention discloses a wind powder mixing temperature and flow speed secondary adjusting system. A wind outlet of a primary fan is divided into two paths. One of the two paths communicates with a hot wind inlet of an adjusting system and an inlet of a first valve through an air preheating device. An outlet of the first valve communicates with a wind inlet of a coal mill. The other path of the two paths communicates with a cold wind inlet of the adjusting system and an inlet of a second valve. An outlet of the second valve communicates with the wind inlet of a coal mill. An outlet of a coal feeding device communicates with a coal inlet of the coal mill. An outlet of the coal mill, an outlet of a wind powder air-solid two-phase temperature and flow speed adjusting system and inlets of burners on a furnace communicate with one another. According to the wind powder mixing temperature and flow speed secondary adjusting system, secondary adjusting of wind coal mixing temperature and flow speed can be achieved, the problems of coal powder pipeline backfiring, burning loss of spraying nozzle, burner surrounding coking and overtemperature of the wall temperature of the water cool wall and the metal wall which are caused by once low wind speed are solved, safe and stable running of the system is ensured, and meanwhile, the coal powder burned-out performance, the furnace underload burning stability and the running flexibility of machine units are improved.

The invention relates to a low NOX solid residue discharge coal dust combustion method which is characterized in that a fire grate at the bottom of an old boiler is dismounted, so that a pure hearth is formed, or a boiler provided with the pure hearth is manufactured; at least one inflamer is arranged at the bottom or one side of the pure hearth; when a primary air fan is started, primary air and coal dust enter the inflamer through a primary air/coal dust pipe, so that the primary air and the coal dust can burn sufficiently after entering a combustion chamber; meanwhile, a flame detector automatically enters a crust block prevention tertiary air curtain regulating valve which can monitor and has the function of linkage protection and regulation and a secondary air regulating valve, an air curtain is formed on the inner wall of a high temperature fire resistant layer by the wind sprayed out of a crust block prevention tertiary air curtain spray pipe, the secondary air enters the combustion chamber through a secondary air rotational flow guider and a secondary air flame stabilizing rotational flow guider, the rotational flow direction of the secondary air is consistent with that of an axial flow generator, and the secondary air is mixed with the coal dust burnt by the primary air again to be burnt, thus leading the coal dust to be burnt more fully. The invention has the advantage of burning the coals with low ash fusion point and high ash fusion point.

The invention relates to gel ointment for treating burn and scald, which is characterized in that sodium carboxymethyl cellulose and other gels are compounded into ointment matrix; and the ointment is carried with percolate miraculous for burn and carbon powder burned by residues. The gel ointment has the following advantages that the ointment has hemostasis function, has the function of inhibiting bacteria growth, can prolong the time for releasing medicament, generates biological adhesion to firmly adhere to an afflicted part, has the function of adsorbing tissue fluid generated after burning and scalding, has the function of inhibiting fibrocyte growth and reducing scars, forms a membrane shape at the afflicted part under the action of body temperature and natural condition, does not adhere to the skin, is easy to take off, does not cause twice bleeding and harm, is more stable, and is convenient to use.

The invention provides a powder combustion experiment platform which mainly comprises a fuel gas conveying system, a water cooling circulation system, a nitrogen system, a test bed and a flat flame combustor, and the fuel gas conveying system comprises an air system, a methane system and a mixed fuel gas pipeline. By means of the powder combustion experiment platform, the powder combustion performance can be better observed.

The invention discloses an energy conservation and emission reduction modification method for reducing the emission load of nitric oxide of a DDF cement decomposing furnace. By arranging an air gathering bellows and a gooseneck pipe on the DDF decomposing furnace with the small volume, the smoke standing time is prolonged; part of coal powder is distributed to the conical portion of the decomposing furnace, part of tertiary air is distributed to the upper middle portion of the decomposing furnace, the volume of the DDF decomposing furnace is enlarged, the position of part of coal powder entering the furnace is reduced, and the coal powder burn-off rate is improved. The coefficient of excess air in the lower middle portion of the decomposing furnace is smaller than 1.0. Under the condition of insufficient oxygen, CO of a large proportion is generated to become reducing agents for reducing and eliminating nitric oxide. An ash returning channel is arranged inside the air gathering bellows and feeds raw materials and coal powder particles subsided back to the position above a middle nozzle of the decomposing furnace, so that the problem of sintering blockage of accumulated ash is solved, the coarse particle processing capacity of the decomposing furnace is improved, the decomposition rate of raw materials entering the furnace is improved, and through the double effects of reducing emission of nitric oxide and reducing heat loss, the effective energy conservation and emission reduction of a cement calcining system are achieved.

The invention provides aluminum zinc based multi-component alloy spherical powder and a preparation method and application thereof, and belongs to the technical field of alloy powder. The aluminum zinc based multi-component alloy spherical powder comprises aluminum, zinc and component metal elements, and the component metal elements comprise one or more of Li, Mg, Bi, Sb and Pb. The Li and the Mgin the component metal elements have lower melting and boiling points, are volatile and can form steam, and the steam can prevent the formation of oxides; when the Li and the Mg are burnt in a gas phase, a gas phase diffusion flame can be formed, the heating rate is high, and the opportunity for forming the oxides is less; and therefore, when the Mg and the Li are added into aluminum and zinc, thefuel activity of the aluminum and zinc can be improved, the firing temperature is lowered, and the burning performance is improved. The density of the Bi, the Sb and the Pb in the component metal elements is much greater than metal aluminum, due to the special performance of the oxides of the Bi, the Sb and the Pb, the burning efficiency of aluminum particles can be improved by increasing the high volume impulse quantity and energy density of the aluminum particles. The embodiment shows that the powder burning heat reaches 27kJ/g, the firing temperature is lowered to 960 DEG C, and the burning rate reaches 90%.

The invention discloses a laser projection light source, which comprises a laser array, a telescopic assembly, a dichromatic assembly, a light receiving assembly, a fluorescent powder wheel device, ablue light path, a light gathering assembly, a color wheel device and a light bar assembly, wherein a laser beam emitted by the laser array penetrates through the telescopic assembly, the dichromaticassembly and the light receiving assembly and is then focused on the surface of the fluorescent powder wheel device. The first surface of a red filter area of the color wheel device is a scattering surface, the second surface is a long-wave-pass filter film, and light in a reflected wave band penetrates through a diffuse scattering surface twice, so that the energy is more uniform when a reflectedlight spot irradiates the surface of the surface of fluorescent powder, and the energy density at the center point is reduced; and the powder burning risk of the high-brightness laser projection system can be simply and effectively solved.

The present invention belongs to the field of fuel coal activator, and is especially one kind fuel coal catalyzing and inducing activator for cement industry. The fuel coal catalyzing and inducing activator consists of iron powder 30-60 wt%, carbide slag 20-50 wt% and modifying leftover 10-30 wt%. The modifying leftover is obtained with hydrocarbon leftover from food and petrochemical industry and aerated concrete powder in the weight ratio of 60-90 to 10-40 and through pulverizing for 0.5-1.0 hr. The present invention can lower coal powder igniting temperature, raise coal powder burning-out degree and speed burning of coal, and has the features of low cost and no negative effect on cement clinker performance, and is suitable for bituminous coal with high ash content, anthracite coal with low volatile component content and other kind of coal.

The invention discloses a preparation method of magnetic ferrite. The method comprises the following steps: putting ingredients into a ball mill, performing coarse grinding, wherein the coarse grinding time is controlled to 5 h, and the powder particle size is controlled at 2-5 [mu]m, and after the coarse grinding is finished, performing heating drying, wherein the drying temperature is controlledat 55-60 DEG C, and the drying time is controlled to 1 h; and performing mixed combustion: putting the dried raw material powder into a crucible, and dispersedly introducing a pure oxygen gas into the raw material; and igniting the carbon powder until combustion heat is completely discharged. The preparation method of the magnetic ferrite provide by the invention innovates the step of mixed combustion, replaces a pre-sintering step in a conventional process, and can save a large amount of fuel; the method creates a process of aluminum powder burning heating, and can provide a large amount ofheat; and a large amount of introduced oxygen gas can oxidize and cool the burned aluminum powder and iron powder in time to prevent metals from being molten and accumulated together, and the metals are oxidized in time, so that the strength of an oxide can be reduced, and the processing difficulty of the ball milling step is reduced.

A coal powder burner can avoid scale and high-temperature corrosion in vertical gradient burning boiler, wherein a back side d1 of dense first injector is fixed with a dense secondary injector, the dense first airflow and the axis of the dense second airflow have a corner at beta 1, a dilute second airflow can be arranged at the back of the dilute first injector. The two airflows can improve the injection rigidity to confirm the oxidization condition near the water cooling wall and reduce the temperature near the water cooling wall, to avoid scale and high-temperature corrosion. The invention can arrange space or baffle between the dense first injector and the dense secondary injector, to reduce the mixing between the dense first airflow and the dense secondary airflow.

The invention discloses a biomass wood powder burning engine and relates to the technical field of burning equipment. According to the biomass wood powder burning engine, the burning engine can be cooled through air cooling, and the material inlet amount and the air input of the burning engine can be automatically controlled. The main technical scheme of the biomass wood powder burning engine includes that the biomass wood powder burning engine comprises a feeding portion and a burning portion, wherein a burner is connected to a feeding pipe, an oxygen supply component is arranged at one end of the burner, one end of a cooling pipe is connected to a cooling fan, the other end of the cooling pipe communicates with the burner mutually, and a first detector is arranged in the burner and connected to a first controller; when the temperature in the burner is smaller than a preset value, the first controller closes the feeding pipe; and a second detector is arranged in the position of a spray outlet of the burner and connected to a second controller, and when the temperature in the position of the spray outlet of the burner is greater than a preset value, the second controller controls the cold air inlet amount of the cooling fan to be increased. The biomass wood powder burning engine is mainly used for burning biomass wood powder.

The invention relates to a method for measuring the primary air-coal powder burning distance and coals, comprising the following steps: firstly, segmenting a primary air channel, measuring the length li of each section of air channel, the primary air temperature Ti of each section of air channel and the primary air temperature Tn of a burning distance section; measuring the primary air velocity Vi of each section of air channel, and the primary air velocity Vn of the burning distance section; measuring the coal powder concentration coali of the section of air channel and the coal powder concentration coaln of the burning distance section; measuring the coal powder fineness R90 of each section of air channel, that is, the percentage of coal powder which dose not pass through a 90mu m sieve is measured; measuring oxygen content Oi in the primary air of each section of air channel and oxygen content On in the primary air of each section of burning distance; measuring a coal quality parameter M of each section of the air channel; and substituting the measured parameters into a formula for computing, and obtaining the burning distance ln by computing the final section of air channel. Compared with the prior art, the method is utilized to collect the primary air channel length, the primary air temperature, the primary air velocity, the coal powder concentration, the coal powder fineness, the oxygen content, the coal quality parameters, the temperatures of the burner areas around a nozzle and other real-time parameters, thus computing the actual burning distance more accurately, which has significance on reasonable design of the boiler and safe running of changing the coals. Meanwhile, if the burning distance is known, online monitoring on the coal changes can be realized, thereby carrying out reasonable air distribution, improving the burning efficiency of the boiler and reducing pollutant emission.

The invention relates to a gel film agent for treating burn and scald, which is characterized in that sodium carboxymethyl cellulose and other gels are compounded into film agent matrix; and the film agent is carried with percolate miraculous for burn and carbon powder burned by residues. The gel film agent has the following advantages that the film agent has hemostasis function, has the function of inhibiting bacteria growth, can prolong the time for releasing medicament, generates biological adhesion to firmly adhere to an afflicted part, has the function of adsorbing tissue fluid generated after burning and scalding, has the function of inhibiting fibrocyte growth and reducing scars, does not adhere to the skin, is easy to take off, does not cause twice bleeding and harm, has good ventilation property, is more stable, and is convenient to use.

The invention discloses the technology for removing pollutants in coal powder burning, in particular to application of multi-section composition pollutant removing technology in novel coal powder industrial boilers. The application includes steps of reducing sulfur content and ash content of fuel coal by washing raw coal, burning by low-nitrogen cyclone burner, realizing low-nitrogen combustion of coal powder, completing efficient dust extraction after burning by adopting cloth bag dust extraction technology, desulfurizing smoke, and desulfurizing tail smoke by the smoke desulfurizing technology after a cloth bag deduster. Pollutant removal technologies before, during and after burning are combined to use, and since the multi-section composition pollutant removing technology is adopted from raw coal to tail smoke purifying, high smoke and sulfur dioxide removal efficiency is realized on the premise of low burden of the single technology.