129results about How to "Lower ignition point" patented technology

The invention relates to a process for preparing a clean synergist for saving coal, desulfurization and cleaning coke. Active calcium oxide and magnesium hydrate are mixed and added with sodium carbonate, ferrosilicon powders, manganese dioxide, strontium carbonate and barium hydroxide in turn and finally added with active carbon and evenly mixed to prepare the clean synergist which comprises the following compositions in percentage by weight: 20 to 30 percent of the active calcium oxide, 9 to 12 percent of the magnesium hydrate, 12 to 20 percent of the sodium carbonate, 8 to 10 percent of active carbon, 12 to 15 percent of the ferrosilicon powders, 8 to 12 percent of the manganese dioxide, 3 to 5 percent of the strontium carbonate and 5 to 7 percent of the barium hydroxide. on the premise of unchanging the prior coal burning process and equipment of various boilers and the prior smoke exhaust process and equipment, the clean synergist of the process is only needed to add according to the physicochemical index of coal used by customers, thereby achieving the functions of saving the coal, the desulfurization and cleaning the coke.

The invention provides a boiler coal combustion-improving desulfurizing agent composition. The composition comprises the following components in parts by weight: 3-9 parts of sodium carbonate, 1-2 parts of sodium acetate, 3-9 parts of calcium carbonate, 4-9 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 3-10 parts of ferric oxide, 8-22 parts of potassium permanganate, 8-22 parts of potassium chlorate, 15-40 parts of activated attapulgite clay, 7-13 parts of manganese oxide, 4-8 parts of copper oxide, 4-8 parts of alumina, 3-8 parts of copper carbonate, 3-10 parts of zinc oxide, 3-10 parts of zinc nitrate, 4-11 parts of sodium dichromate, 0.5-1.5 parts of barium molybdate, 0.5-1.5 parts of vanadium pentoxide, 0.2-0.5 part of cerium oxide and 1-3 parts of dispersing agent JFC. The composition is an additive suitable for coal-fired boilers in the petroleum, chemical, power, thermoelectricity and metallurgy industries, can absorb and solidify sulfur dioxide generated in the combustion process, adsorbs dust and other harmful substances in quantity and simultaneously removes smoke dust scales and jelly adhering to the inner walls of combustors, thus inhibiting the concentration of flue gas emission.

The invention discloses a power plant boiler used coal-saving desulfurating additive, which is prepared by mixing calcium oxide, silicon dioxide, calcium ammonium nitrate, sodium nitrate, potassium permanganate, ammonium nitrate, iron oxide, alumina, activated carbon and borax by curtain weight percentages; and then using a pulverizing mill to pulverize the mixture into power, the granularity of which is 80-100 MU; putting the power into a stirrer and stirring the power; packing the power into finished product after the power is tested to be qualified. The invention has obvious sulfur capturing and desulfurizing effects, can save energy and support combustion, can lower the blackness of the exhausted smoke, can clear ashes and remove coke, and need not change the existing combustion process and equipment. The invention is in particular applicable for the coals with high ash content, high sulfur content and low volatile constituent content. The invention can reduce equipment leakage accident caused by poor quality of coal, can ensure the safe operation of the boiler effectively, can ensure the safe operation of electric generating set, therefore being worthy to be spread by all thermal power plants.

The invention provides a multifunctional additive for pulverized coal injected into a blast furnace and a multifunctional additive addition method and belongs to the field of blast furnace iron making. The multifunctional additive is a powdery compound mixture, the particle size of the multifunctional additive is required to be larger than 100 meshes, and the proportion of the multifunctional additive with the particle size of above 200 meshes is required to account for above 80%. The multifunctional additive has the characteristics of being capable of obviously improving the combustion characteristic of the pulverized coal, reducing the ignition point, increasing the precipitation yield of volatiles, the combustion speed and the combustion heat, passivating the reaction activity of coke, reinforcing the supporting effect of a skeleton and inhibiting the low-temperature reduction degradation of iron-containing furnace burden. After 1%-6% of multifunctional additive is added to the pulverized coal injected into the blast furnace, the ignition point of the injected pulverized coal can be obviously reduced by 14 DEG C, the yield of the volatiles is increased by 23.38%, the combustion ratio of the pulverized coal is increased by 11.9%, the average reaction rate of the pulverized coal is increased by 8.7%, the low-temperature reduction degradation index (RDI) of sinters at 500 DEG C is increased by 23.10%, the coke reactivity (CRI) of the pulverized coal is reduced by 11.23%, and the post-reaction strength (CSR) of the pulverized coal is increased by 10.57%.

The invention discloses a multifunctional rare earth sulfur-fixing denitration energy-conservation additive, which solves the problems that the conventional sulfur-fixing agent has relatively low sulfur-fixing rate and does not have the function of reducing NOx emission. The additive is characterized by consisting of the following raw materials in percentage by mass: 8 to 10 percent of rare earth compound, 12 to 15 percent of inorganic salt, 51 to 65 percent of alkaline earth metal compound, 5 to 8 percent of aluminum compound, 5 to 8 percent of zinc compound and 5 to 8 percent of silicon compound. The additive is prepared by the following steps of: grinding the raw materials into fine particles with the particle size of 100 to 300 meshes; proportioning the particles according to the mass percentage at normal temperature; uniformly stirring and mixing; preparing powder from the mixture; and compounding. The additive has the advantages of capability of being popularized in a large area, high sulfur-fixing rate and denitration function and is suitable for coal-smoke type heavily-polluted production links.

The invention relates to an industrial composite binding agent molded coal, in particular to a metallurgical molded coal manufactured by raw materials containing humic acid. The molded coal directly takes weathered coal and brown coal as the raw materials which are mixed with coal dust; after being processed by special treatment, the mixture is pressed by a ball press to be molded. The manufactured molded coal has the drying cold strength of 980N/piece, the hot strength of 450N/piece, the thermal stability (more than 6mm) of 93.4%, the drop strength (more than 13mm) of 97.6%, low ignition point and the burning rate of more than 92%. The metallurgical molded coal is suitable for bituminous coal and anthracite which have high ash fusion point, low sulphur content and the fixed carbon content of more than 70%, thus being applicable to a metallurgical furnace.

The invention provides a current collector and a preparation method and application thereof. The current collector comprises a functional film layer and metal layers arranged on the upper surface andthe lower surface of the functional film layer, wherein the functional film layer comprises a flame retardant. According to the current collector and the preparation method thereof, the flame retardant is added into the functional film layer so that the ignition point can be effectively reduced, the flame retardant can be released into electrolyte from the current collector at high temperature toachieve an active fire extinguishing effect, and the safety performance of the battery is remarkably improved; the functional film layer can also bear the metal layers on the upper surface and the lower surface, the weight of the current collector is reduced and the energy density of the battery is improved.

The invention relates to a decoking agent capable of reducing and removing coke blocks and deposited ash which are positioned in a coal burning boiler and an industrial boiler. The decoking agent comprises the following components in percentage by weight: 3%-10% of potassium nitrate, 1%-5% of magnesium nitrate, 0.5%-2% of cupric nitrate, 5%-20% of ammonium sulfate, 0%-2% of picric acid and 0%-2% of borax. According to the decoking agent, an copper ion is a combustion-supporting catalyst, and can reduce the ignition point of deposited carbon and promote the sufficient combustion of coal powder; borax can crisp the coke blocks, promote the combustion of carbon contained in the coke blocks and realize the falling of the coke blocks; the nitrate is an oxidizing agent, can release oxygen for combustion support under the condition of high temperature and can clean coke and the deposited ash by synergically generating explosion effect with picric acid. The decoking agent disclosed by the invention has the advantages of low cost and easiness for obtaining of raw materials, simple preparation process and convenience for use without causing any corrosion or generating any secondary pollution on the boilers.

The present invention discloses a catalyst for the catalytic combustion of methanol, hydrogen, methane and natural gas. The present invention consists of a metal oxide active component occupying 0.01-5 percent of the catalyst weight and an alumina carrier occupying 99.99-95 percent of the catalyst weight. The preparation method of the catalyst is that: active alumina is firstly placed in alkaline precipitant for presaturation treatment, baked in a short time under high temperature, impregnated in the salt solution containing metal ions, dried and roasted to obtain the catalyst product. The evaluation result of using the catalyst shows that: the combustion point of gas is reduced; the conversion of gas is increased.

The invention provides a method simultaneously for moisture removal and solid fuel preparation from sludge. The method comprises the following steps: step S01: subjecting wet sludge to pretreatment under heating so as to obtain heat conditioned sludge; step S02: cooling the heat conditioned sludge so as to obtain cold sludge, adding a carburetting conditioning agent into the cold sludge, and carrying out uniform mixing so as to obtain carburetted conditioned sludge; step S03: subjecting the carburetted conditioned sludge to dehydration treatment; and step S04: subjecting the dehydrated carburetted conditioned sludge to heat drying so as to obtain a solid sludge fuel. Through combined application of a heat conditioning process and a conditioned sludge sensible heat direct utilization systemin pretreatment of the sludge, the method provided by the invention avoids the problem of excessively high energy consumption, and integrates advantages like improvement of sulfur-fixing, chlorine-fixing, nitrogen-fixing and phosphorus-fixing abilities of modified heat-conditioned sludge and reduction of the content of bound water in a reasonable energy consumption range.

The invention discloses a continuous-casting mold flux for decreasing sticking steel breakouts and a preparation method thereof. The continuous-casting mold flux for decreasing the sticking steel breakouts comprises the following chemical components of, by weight, 32.5-35.5 percent of SiO2, 29.5-31.5 percent of CaO, 1.5-3.0 percent of MgO, 2.2- 3.0 percent of Al2O3, 0.5-1.5 percent of Fe2O3, 11.0-13.0 percent of Na2O, 10.0-12.0 percent of F-, 3.0-4.0 percent of C solid and the balance unavoidable impurity, wherein the binary basicity is 0.87 to 0.93; a melting point is 1050 to 1070 DEG C; and the viscosity below 1300 DEG C is 0.115Pa*S to 0.135Pa*S. In the practical application of the mold flux, a flame in a crystallizer is uniform; the spreadability is better; caking and agglomerating phenomena do not exist; a melt cinder is stable; the lubrication is sufficient; and the rate of the sticking steel breakouts can be decreased to below 5 percent from original 10 to 20 percent.

The invention relates to the technical field of energy environmental engineering and provides a method for mixed burning of agriculture and forestry waste, sludge and household garbage by using a grate furnace. The method comprises burning the agriculture and forestry waste, sludge and household garbage in a grate garbage burning furnace, igniting by using agriculture and forestry waste, and adding household garbage and sludge in the furnace to realize mixed burning when the temperature of the furnace rises to 850 DEG C, wherein the mass percent of the agriculture and forestry in the mixed fuel is within 40 percent, the mass percent of sludge in the mixed fuel is within 30 percent, the burning temperature of the grate burning furnace is controlled at 850 to 1000 DEG C, and the smoke gas generated by burning stayed in the furnace is controlled above two seconds. The invention is low in the cost, improves the burning efficiency of the garbage burning furnace, solves the problem of pollution caused by the sludge, ensures that the agriculture and forestry waste can be recycled, reduces discharge of pollutants, particularly heavy metal and dioxin and reduces the consumption of fossil energy.

The invention discloses a process for preparing granular biomass fuel by using pig manure and a prepared product. The process disclosed by the invention comprises the following steps of: (1) mixing raw materials such as the pig manure, biomass powder crumb and high charcoal ash in proportion; and according to the proportion, the final product comprises 60-90% of pig manure, 10-30% of biomass powder crumb and 1-30% of high charcoal ash by dry weight; (2) dehydrating the mixed raw material obtained in the step (1); and (3) pelletizing the raw material dehydrated in the step (2). According to the invention, the biomass powder crumb and the high charcoal ash are added into the pig manure, thus peculiar smell of manure is removed and ignition point of the obtained fuel is reduced.

The invention relates to a process and a device for reclaiming blown gas made from coal and by oxygen-enriched combustion. The flow of the reclaiming process comprises that: gas making furnace residue and coal ash are sent to the lower part of a fluidized bed furnace through a screw-type coal feeder and subjected to heat exchange through an air preheater, primary air fluidization at the temperature of approximately 120 DEG C and partial combustion reaction; uncombusted portions are continuously combusted in secondary air and generate high-temperature flue gas at the temperature of between 950 and 1,000 DEG C which enters a cyclone dust collector in a blown gas combustion furnace; flue gas subjected to dust collection by the cyclone dust collector is drained into the blown gas combustion furnace from the top of the cyclone dust collector; the blown gas is completely combusted under the action of the secondary air; flue gas reaches the temperature of between 950 and 1,050 DEG C, is drained out from the blown gas combustion furnace and enters a boiler system; and finally flue gas at the temperature of between 130 and 150 DEG C is emptied by chimneys. The device of the reclaiming process comprises the fluidized bed furnace, the blown gas combustion furnace and the cyclone dust collector, wherein a furnace chamber of the fluidized bed furnace is communicated with the cyclone dust collector in the blown gas combustion furnace through a flue; the lower part of the fluidized bed furnace is provided with a primary air and fuel inlet, and the lower part and the middle part of the fluidized bed furnace are provided with a secondary air inlet respectively; the inside of the blown air combustion furnace is provided with the cyclone dust collector; and the upper part of the blown air combustion furnace is provided with a blown gas inlet and the lower part of the blown air combustion furnace is provided with a flue gas outlet pipe.

The invention discloses a process for preparing activated carbon livestock excrement fuel, which comprises the following steps of: (1) mixing and stirring raw materials, wherein on a dry weight basis, the raw materials comprise 60 percent-80 percent of livestock excrement, 10 percent-30 percent of biomass silt-sized grain, and 1 percent-30 percent of activated carbon; (2) dehydrating the raw materials stirred by the step (1); and (3) granulating the raw materials dehydrated by the step (2). The process for preparing the activated carbon livestock excrement fuel has the advantages that: the process is simple, and activated carbon used as a deodorizer can be prepared through flotating or carbonizing pulverized fuel ash.

The invention relates to a resource utilization method of biomass waste residues. The method comprises the following steps: biomass waste residues such as bark, wood sawdust, papermaking sludge and waste plastics are mixed with raw coal, the mixture is sent into a circulation fluidized bed coal firing boiler for burning, wherein the weight content of biomass to raw coal dry basis is no more than 30%; wood sawdust with the particle size which is no more than 15mm is directly mixed with raw coal to be sent into the circulation fluidized bed boiler for burning; bark or waste plastics are grinded to particles or plate-shaped particles, the obtained particles are sent into the circulation fluidized bed boiler through an independent conveyer to be mixed with raw coal; and the dewatered papermaking sludge of which water content is less than 80%, is mixed with raw coal and then the mixture is sent into the circulation fluidized bed boiler for burning.

The invention relates to a method for improving stability of water-coke slurry. The water-coke slurry is prepared from the raw materials, including petroleum coke, activated sludge, water and a dispersing agent. The method comprises the steps of (1) sieving petroleum coke through a sieve, and remaining petroleum coke of which the particle size is less than 0.8mm; (2) dissolving the dispersing agent into water, and uniformly agitating for later use; (3) integrally uniformly mixing the dispersing agent solution obtained in step (2) and activated sludge, pouring into a ball mill tank together with the petroleum coke processed in step (1), wherein the quantity ratio of large balls to small balls in the ball mill tank is 30: 150; a ball mill rotates at the speed of 230 to 380r/min; the ball milling costs 30 to 50 minutes; (4) filtering the slurry obtained by ball milling through a sieve with 40 meshes so as to remove impurities and large particles and obtain water-coke slurry. According to the method, the activated sludge is doped into the water-coke slurry to greatly improve the stability of the water-coke slurry, so that the problem of poor stability of the water-coke slurry can be completely solved; meanwhile, a new treatment way is provided to the activated sludge of a melting plant, and the sludge treatment cost of the melting plant can be reduced.

The invention relates to a high-efficiency energy-saving solid mixed fuel moulding technology applicable to being used in the field of mixed fuel. The high-efficiency energy-saving solid mixed fuel moulding technology comprises the following steps: firstly naturally drying biomass until moisture content is 20%, then crushing and screening by utilizing a scissor-type crushing machine for selecting a part with the granularity of 2-7mm, crushing slack coal until the granularity is 2-3mm by adopting a two-stage crushing and grinding technology, conveying the crushed biomass and slack coal in a mass ratio of 25-30% into a stirring barrel by virtue of a pneumatic conveying pipeline provided with an automatic control device respectively, adding a composite binder in a mass ratio of 10%, uniformly mixing the components in the stirring barrel, then conveying mixture to moulding equipment by utilizing a conveyor belt, adjusting the shape and size according to practical requirements, moulding, screening qualified moulded products, and conveying the qualified moulded products to a packaging opening to be packaged. The whole technology is high-efficiency, energy-saving and high in automation degree. The produced fuel has good combustion activity, low pollutant discharge, high strength and strong applicability.

The invention discloses a preparation method of clean lignite-based semicoke barbeque charcoal, and belongs to the technical field of barbeque charcoal preparation by lignite-based semicoke. The barbeque charcoal is prepared from the lignite-based semicoke, binder and water. Lignite is crushed below 80 mm by crushing, the crushed lignite is subjected to drying in a drying machine and a pyrolitic reaction in a pyrolizing furnace in sequence, the solid lignite semicoke is produced, and after being crushed below 3 mm by a crusher, the lignite semicoke is sent for subsequent blending and stirring; solid semicoke powder, the binder, sulfur fixing agent and the like are subjected to stirring and blending treatment through a blender, and a blended material and the water are sent into an edge mill for grinding and secondary blending for formed mixture preparation; the mixture is conveyed to a forming machine through a conveyor, and barbeque charcoal products in different shapes are prepared through the forming machine; the wet formed barbeque charcoal is conveyed to a mesh-belt dryer for drying treatment. According to the method, the lignite semicoke is adopted as a raw material, so that the ignition point and the production cost of the barbeque charcoal are effectively lowered, which are beneficial to use and popularization of the barbeque charcoal.

The invention discloses a non-uniform type porous medium combustor processing organic waste gas. The non-uniform type porous medium combustor processing the organic waste gas is sequentially provided with a premixing chamber, a mixing chamber, a gas uniform distributor and a combustion chamber from bottom to top. An organic waste gas pipeline, an air pipeline and an oxygen pipeline are arranged in the pre-mixing chamber. The combustion chamber is filled with a porous medium of a non-uniform type honeycomb structure. The non-uniform type honeycomb structure comprises a lower layer, a middle layer and an upper layer. The middle layer is a combustion area. The pore diameter of the lower layer and the pore diameter of the upper layer are smaller that of the middle layer. From bottom to top, the pore diameter and the porosity of the middle layer are gradually increased. The intersection portion of the lower layer and the middle layer is provided with a heating wire igniter. The non-uniform type porous medium combustor processing the organic waste gas solves the problems that in the prior art, in the organic waste gas combustion processing process, combustion is not stable, the combustion temperature is high, and secondary pollutants such as nitric oxides are prone to generation.

The invention discloses a multifunction coal dust combustor of the technical field of road construction and maintenance machinery, comprising a traveling chassis, a combustion furnace, an air and coaldust regulating mechanism, a drive mechanism, a blower, an automatic ignition device and an electric control system, wherein the air and coal dust regulating mechanism consists of an electromotion air valve, a pipeline, a flap valve and a Venturi pipe; an air outlet is connected with the combustion furnace; the pipeline comprises an automatic ignition device channel, a dense coal dust channel, athin coal dust channel, a secondary air channel and a third air channel which are arranged in sequence from inside to outside; the outlet end of the dense coal dust channel is connected with the Venturi pipe; the outlet of the Venturi pipe is provided with a bluff body; and the flap valve is arranged on the inlet ends of the dense coal dust channel and the thin coal dust channel. The multifunctioncoal dust combustor has high degree of automation, sufficient combustion and high efficiency, thereby lowering demands on coal quality, and long service life and can realize the functions of automatic rotation of a combustion chamber, automatic travel of the whole combustor, automatic ignition, air oil automatic regulation and temperature automatic control.