132results about How to "Emission reduction effect is obvious" patented technology

The invention discloses a method for preparing dissolving pulp through oxide degradation of pulp by adoption of the oxide degradation method so as to solve the problems in the prior dissolving pulp preparation technique of severe pollution, low yield, long period, resource shortage and so on. The method for preparing the dissolving pulp through oxide degradation of the pulp comprises the following processing steps of: alkalizing purification, squeezing preparation of alkali cellulose, oxygenization, and continuous oxide degradation and depolymerization. By adoption of the method, the production speed can be improved; the product quality can be improved; the steam consumption can be saved; and the generation of pollutants can be reduced.

The present invention discloses a city domestic rubbish anaerobic schizolysis gasification processing apparatus and technical skill thereof, wherein the apparatus is composed by a rubbish storage hopper, a converting kiln, a compressor, an organic matter converting kiln and a sewage disposal system etc. The technical skill includes no exogenous source low energy consumption dispose and system secondary pollution control technique etc. Technical problems like system oxygen exhaust technology, domestic rubbish dehumidifying technology, flowing technology of solid material inside the system, heating technology during the process etc. are solved through the invention. Harmlessness and zero discharge, energy self-supply and basic energy source and substance recirculation in the process of production, social low cost input and facilitating operation of rubbish treatment, and every saving, exhaust reducing and material cycle in natural world can be realized.

The invention discloses a system and a method for exploitation of mixed-gas coal-bed methane exploitation in a drainage roadway in an oil well, and relates to a coal-bed methane exploitation technology. The exploitation method comprises the following procedures: 1.various gases are integrated into a mixed gas; the mixed gas comprises a or a plurality of strongly exchanged gases, which comprises H2S, SO2 and CO2; the mixed gas also comprises a or a plurality of weakly exchanged gases, which comprises N2, H2 and He; 2. the mixed gas is injected into a coal bed (5) through an injection hole (1) with high pressure; 3. gas comprising the coal-bed methane is obtained from an drainage hole (6) with a drainage device, until the methane content is lower than the economic exploitation content and safety content. The invention promotes the exploitation rate and unit output of the coal-bed methane, and produces quite an obvious effect in reducing the greenhouse gas emission. Meanwhile, the invention is provided with the effect of reducing the outstanding risks of gas, and is applicable in the low-penetration exploitable coal-bed methane exploitation field.

The invention discloses a preparation method of a light calcium-alginate-base sponge body functional material. The preparation method comprises the following steps: in room temperature, evenly mixing sodium alginate powder with soluble calcium salt, magnesium salt or aluminum salt, a reinforcing agent, peroxide and a catalyst to obtain a mixture; moistening with an alcohol-water solution to form paste; rolling by molding equipment to form a film material or a plate material; and then sequentially performing infiltration, complexation for pore formation, and expansion for pore formation. The preparation method has the characteristics of simple technology, low control difficulty, low equipment investment, energy-saving effect, low production cost and the like and is applicable to large-scaled industrial production; the prepared light calcium-alginate-base sponge body functional material is the same in structure and composition regardless of interior or exterior, good in quality, light in weight, high in mechanical strength, and excellent in imbibition performance and air permeability, and can be widely applicable to the fields of antibacterial materials, flame-resistant materials, adsorbing materials, acoustic materials, vibration-absorptive materials and the like; the market prospect is extensive.

The invention relates to a powder feeding system, in particular to an exhaust gas and hot-blast air dual-medium powder feeding system, which belongs to the technical field of coal-fired boilers. The powder feeding system solves the problems of high NOx discharge amount, easy scorification and the like which exist in the conventional hot-blast air powder feeding system boiler. One end of a tertiary air pipeline and one end of an exhaust gas pipeline are communicated with the output end of a mill exhauster; the other end of the tertiary air pipeline is communicated with a tertiary air nozzle on a boiler; an exhaust air bellow is arranged on the tertiary air pipeline; the outlet end of a hot-blast air pipeline and the other end of the exhaust gas pipeline are communicated with one end of a primary air pipeline; the other end of the primary air pipeline is communicated with an inlet of an air-powder mixer; and an outlet of the air-powder mixer is communicated with one end of a primary air powder feeding pipeline. The dual-medium powder feeding system can reduce the amount of air supplied to a main combustor area substantially; and the original tertiary air quantity of the main combustor area is supplied by a burn-out air nozzle of the upper part, so that the powder feeding system effectively ensures that the main combustor area operates under the condition of low excess air coefficients and the NOx production is reduced substantially.

The invention discloses a method for inhibiting emission of fine particles in the process of iron-ore sintering by an agglomeration process and belongs to the technical field of emission reduction of pollutants in the process of iron-ore sintering. The method comprises the following steps: (1) preparing agglomeration liquid, namely uniformly mixing components such as sodium carboxymethyl cellulose, polyacrylamide and an additive to obtain an agglomeration agent, and mixing the agglomeration agent and water to obtain the agglomeration liquid; (2) agglomerating fine particles, namely spraying the agglomeration liquid into flue gas to cause fine particles in the sintering flue gas to be agglomerated to grow larger under the action of the agglomeration liquid; and (3) trapping by a dust removing device, namely trapping and removing the fine particles agglomerated to grow larger by the dust removing device. The method disclosed by the invention has the advantages that agglomeration liquid droplets adsorbing the fine particles are nucleated and collide with each other and grow to form large-particle agglomerates under the condition of low pressure, and a dust-removing device is adopted to remove the fine particles agglomerated to be larger, so that an all-new emission-reducing path is provided for reducing the emission of fine particles in the process of iron-ore sintering.

The invention discloses an energy-saving device and an energy-saving method for producing hard carbon black. The energy-saving device for producing the hard carbon black are characterized by comprising a hard carbon black reaction furnace (7), a high-temperature air preheater (13) of a first smoke outlet (10), a tail gas preheater of a second smoke inlet (21) and a second smoke outlet (22), a raw oil preheater of a third smoke inlet (14) and a third smoke outlet (15), a low-temperature air preheater (25) and a low-pressure fan (35) sequentially, wherein the low-temperature air preheater (25) and the low-pressure fan (35) are communicated with a tail gas outlet (19) of a bag filtering box; the low-temperature air preheater is communicated with a condenser (26); the condenser is communicated with a gas-water separator (27); and a flow valve is communicated with a recovery tail gas inlet (23) of the tail gas preheater. A tail gas flow distributing valve (37) is arranged between the tail gas outlet (19) and the low-temperature air preheater (25); the low-pressure fan (35) is arranged between the low-temperature air preheater and the condenser; an oxygen-enriched mixer (36) and an oxygenator (31) are arranged between a high-temperature air outlet (8) of the high-temperature air preheater and a high-temperature oxygen-enriched air inlet (4); and the oxygen-enriched mixer is connected with the oxygenator.

The invention discloses a beneficiation method for producing blast furnace lump ore by hematite at a medium-high grade. The method comprises the following steps of: crushing the hematite with the iron grade being greater than or equal to 39%, and grading the hematite into materials with two size fractions of 40mm-10mm and -10mm; carrying out dry-type strong magnetic roughing, primary dry-type strong magnetic scavenging and secondary dry-type strong magnetic scavenging on the materials with the size fraction of 4mm-10mm to respectively obtain dry-type strong magnetic roughing ore concentrate, primary dry-type strong magnetic scavenging ore concentrate, secondary dry-type strong magnetic scavenging ore concentrate and lump ore tails, and combining and feeding the dry-type strong magnetic scavenging ore concentrate, the primary dry-type strong magnetic scavenging ore concentrate and the secondary dry-type strong magnetic scavenging ore concentrate to a jigging reselection operation to obtain the blast furnace lump ore; and combining tails in the jigging reselection with the materials with the grade of -10mm into middlings, and feeding the middlings to subsequent grinding and selecting operations for grading. By adopting the method, part qualified blast furnace lump ore can be obtained in advance, the lump tails can be ejected, the goal ore grinding amount (namely the amount of the middlings) can be greatly reduced, and thus the energy consumption for grinding and selection can be greatly reduced.

The invention discloses a system and a method for exploitation of mixed-gas coal-bed methane exploitation in a horizontal hole in an oil well, and relates to a coal-bed methane exploitation technology. The exploitation method comprises the following procedures: 1. various gases are integrated into a mixed gas; the mixed gas comprises a or a plurality of strongly exchanged gases, which comprises H2S, SO2 and CO2; the mixed gas also comprises a or a plurality of weakly exchanged gases, which comprises N2, H2 and He; 2. the mixed gas is injected into a coal bed (3) through an injection hole (1) with high pressure; 3. gas comprising the coal-bed methane is obtained from an drainage hole (2) with a drainage device, until the methane content is lower than the economic exploitation content and safety content. The invention promotes the exploitation rate and unit output of the coal-bed methane, and produces quite an obvious effect in reducing the greenhouse gas emission. Meanwhile, the invention is provided with the effect of reducing the outstanding risks of gas, and is applicable in the low-penetration exploitable coal-bed methane exploitation field.

The invention discloses an air cleaner surface mount adhesive capable of reducing benzene emission and a production method of the air cleaner surface mount adhesive. The air cleaner surface mount adhesive comprises a base material and a molecule activity activation material, wherein the molecule activity activation material is prepared from SiO2, Al2O3, Fe2O3, MgO, CaCO3, TiO2, MnO and a rare-earth element; natural ores containing the material are selected and are subjected to screening, primary processing and secondary processing until the natural ores reach a nano grade; a rare-earth material is added and is irradiated by utilizing THz irradiation equipment to be combined with the base material. When being used, the air cleaner surface mount adhesive is directly stuck on an air cleaner shell or covers a communication pipe. The invention relates to the air cleaner surface mount adhesive capable of reducing benzene emission and the production and application methods; more complete gasoline combustion can be promoted, and oil saving and power are remarkably improved. The total content of benzene substances is reduced and the emission reduction effect is remarkable. The surface mountadhesive is effective for a long period after disposable sticking and has the advantages of low cost and reasonable market price. The invention further relates to the production and application methods of the air cleaner surface mount adhesive; a production technology is simple and the utilization is convenient.

The invention discloses an energy storage system for co-production of hydrogen and urea and a method thereof. The energy storage system comprises a renewable energy power supply, an electrolytic hydrogen production device, a hydrogen storage tank, an oxygen storage tank, an ammonia synthesis reactor, an air separation device and a urea synthesis reactor, water is introduced into the input end of the electrolytic hydrogen production device; the oxygen output end is connected to an oxygen storage tank; the hydrogen output end is connected to a hydrogen storage tank; the output end of the hydrogen storage tank is connected to a hydrogen inlet of an ammonia synthesis reactor; wherein air is introduced into the input end of the air separation device, the oxygen output end is connected to the oxygen storage tank, the nitrogen output end is connected to a nitrogen inlet of the ammonia synthesis reactor, the ammonia output end of the ammonia synthesis reactor is connected to an ammonia gas inlet of the urea synthesis reactor, and a flue gas inlet for introducing flue gas is further formed in the urea synthesis reactor; and the electrolytic hydrogen production device and the synthetic ammonia reactor are powered by a renewable energy power supply.

The invention discloses a hollow porous micro-nano ceramic-tube-beam water-film type integrated removal apparatus for flue gas pollutants, and belongs to the coal-fired power plant energy-saving emission-reduction technologies. The apparatus comprises an upper cover plate (1), a hollow porous micro-nano ceramic-tube-beam assembly (2), a water inlet chamber (3) and associated pipelines (4) thereof, a sewage chamber (11) and associated pipelines (12) thereof, an upper glass fiber reinforced plastic support plate (7), a lower glass fiber reinforced plastic support plate (8), a front side plate (9), a rear side plate (10), and sealing fixing parts. Under driving of pressure difference, a dense water film is formed on the outer surface of a ceramic pipe (17), when flue gas transversely skims over the ceramic-tube-beam assembly (2), gypsum liquid drops, water vapor, tiny particles, and SO2, H2SO4(SO3) aerosol and other acidic compositions in flue gas are captured by the water film, the captured pollutants and condensed water float down the stream, are gathered in the sewage chamber (11), and are sent to a sewage disposal plant through the sewage pipelines (12). The apparatus is simple in structure, low in cost, resistant to corrosion and long in service life, is capable of realizing clean discharge of a coal-fired power plant, also is capable of recovering and utilizing water source in flue gas, and possesses extensive engineering application prospect.

The invention provides a method for recycling noble metal from an automobile exhaust catalyst, and belongs to the technical field of resource recycling. The method comprises the following steps: deoiling and decarbonizing the automobile exhaust catalyst, finely pulverizing, and carrying out acid leaching; carrying out primary chlorination on acid leaching residues in a solution of sodium chloride, sodium chlorate and sulfuric acid; mixing primary chlorination residues with sodium peroxide, carrying out water leaching on an alkaline transfer residue, carrying out secondary chlorination on a water leaching residue; mixing primary chlorination liquid with secondary chlorination liquid, and replacing with Fe powder, so as to obtain a displacement liquid and precious metal ore concentrate; mixing an acid leaching liquid, the water leaching liquid and the replacement liquid, and carrying out neutralization-oxidization; and adding calcium chloride to a neutralization liquid, carrying out desulphuration treatment, and returning a desulphuration liquid to primary chlorination and secondary chlorination procedures by adjusting the amount of sodium chloride, sodium chlorate and sulfuric acid. According to the method disclosed by the invention, noble metal is smoothly leached and recovered; the problems of noble metal recovery and environment protection of the automobile exhaust catalyst are solved; and the method has the characterizes of high adaptability and simple equipment, and is suitable for industrialized production and environmental friendly.

The invention discloses a method for extracting palladium from a low-grade spent alumina carrier catalyst. The method comprises the following steps of mixing the low-grade spent alumina carrier catalyst with a reducing agent, red iron oxide, a flux, a binder and water for grinding to prepare pellets, drying the pellets, and carrying out reduction smelting to obtain a metal melt and smelting slag;carrying out atomization powder spraying on the metal melt to obtain palladium-containing iron alloy powder; carrying out rust treatment on the palladium-containing iron alloy powder, then conductinggravity separation to obtain palladium concentrate and suspension liquid; filtering the suspension liquid for separating ferric oxide hydrate and rust residual liquid; roasting and dehydrating the ferric oxide hydrate to obtain the red iron oxide, and returning the ferric oxide hydrate to the mixing procedure to be used as a trapping agent; dissolving the palladium concentrate by chlorination, andcarrying out filtering to obtain a palladium-containing pregnant solution and filter residues; and purifying, precipitating and reducing the palladium-containing pregnant solution to obtain palladiumpowder. By adopting the method to extract palladium, the palladium recovery rate is greater than 97.0%, the palladium content in the palladium powder is greater than 99.95%, the trapping agent and the rust liquid can be recycled, the emission reduction effect is remarkable, the extraction cost is low, the related equipment is mature, and the industrialization prospect is good.

The invention discloses a beneficiation method for strengthened recycling of fine-particle chromite. The beneficiation method comprises the following steps that firstly, magnetic separation is conducted, raw ore is subjected to strong magnetic separation, and strong magnetic separation rough concentrates and strong magnetic separation tailings are obtained; secondly, reselection is conducted, thestrong magnetic separation rough concentrates obtained in the first step are subjected to reselection, and reselection concentrates and reselection tailings are obtained; and thirdly, flotation is conducted, the ore pulp mass concentration of the reselection tailings in the second step is adjusted, a collecting agent and a foaming agent are sequentially added, one-time rough fine selection is conducted, then, the flotation closed-loop process including at least three times of fine selection, at least two times of scavenging and middling sequential return is conducted, and flotation concentrates and flotation tailings are obtained. The magnetic-reselection-flotation combined technology is adopted in the beneficiation method, the fine-fraction chromite can be effectively recycled, comprehensive concentrate reselection is conducted, the final chromite concentrate Cr2O3 grade is 42% or above, the recycling rate is 80%-90%, the chromite resource is effectively recycled, the integral cost islow, and the high technology index can be reached.

The invention discloses a process and a device for realizing up-to-standard emission of boiler flue gas with a coupling technology. The device comprises an electrostatic synergetic dust remover, wherein the electrostatic synergetic dust remover is connected with an induced draft fan through a flue I, the other end of the induced draft fan is connected with an inlet of a desulfurizing tower through a flue II, and an outlet of the desulfurizing tower is connected with a chimney through a flue III; a mixer is arranged in the flue I; an ozone generator is connected with the mixer through an ozone delivery pipeline; a process water tank is connected with the electrostatic synergetic dust remover and the ozone generator respectively through water delivery pipelines. According to the process and the device, measures such as partial transformation of an existing electrostatic dust remover, addition of the ozone generator and the like are taken, coupling of three technologies of electrostatic synergetic dust removal, ozonation and wet absorption is realized successfully, and units such as an oxidation reactor, an absorption tower and the like are not required to be newly built for technology implementation, so that the process and the device have the advantages of low investment, small occupied area, low transformation workload, low operation cost and the like.

The invention discloses a low-nitrogen energy-saving combustion unit of a combustor. The low-nitrogen energy-saving combustion unit of the combustor comprises a cylindrical shell and a diffusion throat pipe mixing chamber. The front portion of the diffusion throat pipe mixing chamber is arranged in the cylindrical shell. The low-nitrogen energy-saving combustion unit of the combustor is characterized in that the front end of the diffusion throat pipe mixing chamber is conical, and a conical cover is installed in front of a conical shrinkable throat pipe; an annular gap air duct is formed between the outer wall of the conical shrinkable throat pipe and the inner wall of the conical cover; a secondary air pipe communicates with the annular gap air duct; and a conical combustion nozzle is fixed to the front end of the conical cover. By the adoption of the structure, gas can be combusted twice, and the speed of a flame sprayed out of the cylindrical combustion nozzle is high, so that sufficient stirring is achieved in a furnace, the temperature field distribution in the furnace is uniform, and the heat exchange rate is increased; and the energy can be saved by 10% or over by the adoption of the low-nitrogen energy-saving combustion unit. According to the low-nitrogen energy-saving combustion unit of the combustor, the discharge of oxynitride is lower than 40 mg/m<3> and is much lower than the national standard, and the energy saving and emission reduction effects are extremely remarkable.

The invention discloses a nano composite type coal-saving desulfurization and denitrification additive and belongs to the environmental-friendly coal-saving field. The coal-saving desulfurization and denitrification additive is water dispersible solution and consists of solute and a solvent, wherein the solute comprises the following components in parts by weight: 15-45 parts of nano titanium dioxide, 2-8 parts of rare earth lanthanum and high-alumina bauxite, 1-3 parts of triethanolamine acetate, 25-35 parts of nitrate and 5-10 parts of active carbon fiber; the solvent is deionized water, and the mass percentage concentration of the coal-saving desulfurization and denitrification additive is 10-35%. The nano composite type coal-saving desulfurization and denitrification additive disclosed by the invention has the beneficial effects that the burning condition of coal can be effectively improved, the coal consumption can be reduced, and the emission of main pollutants such as SO2 and NOx is reduced, and also has the advantages of stable performance, convenience in storage, good coal-saving effect, obvious emission reduction, simple use and fast investment return and the like.