395results about How to "Solve secondary pollution" patented technology

The invention relates to a wet ammonia flue gas purification process for the combined sulfur and mercury removing and the system thereof. The process adopts chlorine gas as oxidizing agent to completely oxidize elemental mercury in the flue gas, and gas phase divalent mercuric ion after being oxidized is converted into liquid phase divalent mercuric ion through the improved wet ammonia desulphurization process, and further the liquid phase divalent mercuric ion is converted into stable mercuric sulfide sendimentation through liquid phase divalent mercuric ion stabilizing agent. The system comprises a flue gas oxidizing demercuration preprocessing system composed of an oxidizing agent injection device and an electrostatic precipitator, a wet ammonia flue gas sulfur and mercury removing system composed of a reaction absorbing tower, a sulfur removing accessory substance processing system composed of a cyclone cleaner, a dewaterer, and a dryer, and a mercuric sulfide HgS sendimentation processing system composed of a wastewater buffer pool, a liquid phase mercuric ion reaction chamber, and a settling pond. The process and the system can effectively improve the oxidation rate of the elemental mercury in the flue gas, overcome the defaults that the divalent mercuric ion is easy to be reduced and released and the secondary pollution problem is caused by excess oxidizing agent, and greatly improve the efficiency of sulfur removing and mercury removing.

The invention provides a method for preparing a core-shell ferroferric oxide/graphene oxide composite nano-catalyst. The method comprises the following steps of preparing nanometer ferroferric oxide by utilization of a hydrothermal method, preparing graphene oxide by utilization of a modified Hummers method, preparing the core-shell ferroferric oxide/graphene oxide composite nano-catalyst by utilization of an electrostatic self-assembly method. The catalyst prepared according to the method provided by the invention has the advantages that the adsorptive property is excellent, the stability is good, the catalyst can be cyclically utilized, and an excellent adsorption effect can be achieved during the process of degrading simulated dye rhodamine B.

The invention belongs to the technical field of sewage processing, and concretely relates to a drilling wastes recycling method. The method comprises the following steps: performing primary purifying, removing rock debris and sandstones; performing destabilizing and flocculating treatment, conglomerating the suspending granules into a flocculent body; performing solid-liquid separating, using a separated sludge for profile control of a water injection well in an oil field; performing biological treatment on the separated sewage to reduce COD, carrying out microfiltration and ultrafiltration processing for removing a suspension and a colloid as well as reducing SDI, performing reverse osmosis to obtain fresh water for reuse, evaporating concentrated water obtained by reverse osmosis and crystallization, reusing the fresh water obtained by evaporation, and reusing the common salt and potassium chloride obtained by crystallization as an additive of a drilling fluid. The method realizes harmlessness and recycling of the drilling wastes, eliminates pollution on surrounding environment, and is in favor of protection of resources such as soil, air and underground water at periphery of a well field. The method can be widely used in a recycling treatment process of the drilling wastes in the oil field.

The invention discloses a production method of a sludge biomass environment-friendly fuel. The method comprises the following steps: 1) sludge pretreatment: conveying sludge to a pretreatment pool, adding deodorant and bactericide and stirring uniformly; 2) sludge modification: conveying pretreated sludge to a reaction tank, adding modifier, sulfur fixing agent and heavy metal stabilizing agent, reacting uniformly and adding crushed biomass; 3) sludge depth dehydration: carrying out depth dehydration on the modified sludge; and 4) sludge drying: fragmenting the sludge cake treated with depth dehydration and drying. Compared with a prior art, the production method of sludge biomass environment-friendly fuel provided by the invention can realize quantitative reduction, harmlessness, stabilization and resource of sludge treatment, effectively solve a problem of secondary pollution of sludge and obtain the biomass environment-friendly fuel; besides, the fuel can substitute coal for combustion in boiler, make up sludge treatment cost as well as effectively solve a social problem of energy shortage.

The invention relates to a nitrated carbon fiber loaded bismuth oxyhalide nanoflower and a preparation method of the nanoflower. The preparation method of the nanoflower comprises the following steps: respectively dissolving a halogenous ionic solution and bismuth nitrate in ethylene glycol monomethyl ether, slowly adding the halogenous ionic solution into a bismuth nitrate solution after the halogenous ionic solution and the bismuth nitrate are fully dissolved in the ethylene glycol monomethyl ether, evenly stirring and mixing the mixed solution, pouring the mixed solution to a high-pressure reaction kettle with a polytetrafluoroethylene liner, then placing nitrated carbon fiber in the kettle, reacting for 0.5-6 hours in a drying oven at the temperature of 150-160 DEG C, naturally cooling and then washing and drying to obtain a product. Through the nitrated carbon fiber loaded bismuth oxyhalide nanoflower, the BiOX is reused and the problem of secondary pollution is solved; ACF (Active Carbon Fiber) is excellent in adsorption property and capable of absorbing organic pollutants and facilitating the photo-catalysis.

The invention provides a conveying device of a packing machine, which is used for the conveying of the packing machine with secondary feeding. The conveying device comprises a main conveying mechanism, a connecting opening for connecting the main conveying mechanism and the inlet of the packing machine, a segmented parcel delivery machine used for secondary feeding, a secondary feeding conveying mechanism and a feeding sliding chute. The main conveying mechanism comprises a main conveying chute and a main conveying chain installed below the main conveying chute; the main conveying chain is provided with an equidistant push rod which passes through the main conveying chute and extends upwards above the main conveying chute. One end of the secondary feeding conveying mechanism is connected with the discharge opening of the segmented parcel delivery machine, and the other end is connected with the inlet of the feeding sliding chute; and the outlet of the feeding sliding chute is arranged above the connecting opening. Since the secondary feeding conveying mechanism used for conveying auxiliary products is arranged additionally, the conveying device of the packing machine avoids secondary pollution, reduces the falling rate, performs secondary feeding quality inspection and has the advantages of safety, reliability and no pollution.

The invention discloses a method for recycling Fenton iron mud. The method for recycling the Fenton iron mud comprises the following steps: 1, treating wastewater by adopting a Fenton process, after reaction is finished, adding 0.05-1% activated carbon for adsorbing and aiding filtration, stirring and reacting for 0.5-1 h, filtering and separating to obtain water and iron mud filter residue; 2, adding sulphuric acid into the iron mud filter residue, stirring and dissolving for 0.5-2 hours at the temperature of 60-80 DEG C, filtering and separating to obtain a Fe<3+> solution and activated carbon filter residue; and 3, placing a solution containing Fe<3+> into an ultraviolet light reaction tank, wherein the reaction tank contains a supported semiconductor catalyst, reducing Fe<3+> in the solution into Fe<2+> under the ultraviolet light catalytic condition, concentrating a Fe<2+> solution and then reusing the concentrated Fe<2+> solution in a Fenton oxidation wastewater treatment process in the step 1, so that self circulation of an iron mud system is formed. The method for recycling the Fenton iron mud has the advantages that the problem that iron mud secondary pollution is produced by the Fenton oxidation process is solved, recycling of iron resources and activated carbon is realized, and wastewater treatment cost is reduced.

The invention relates to a method utilizing waste and bacterium dreg generated during the process of producing edible fungi from straw raw materials to produce a microorganism organic bacterium fertilizer. The method takes the waste and bacterium dreg generated in the process of producing edible fungi from straw as the raw material, and then subjects the raw materials to technology processes of bacterium dreg pretreatment, preparation of an activating and fermenting liquid, and microorganism secondary fermentation so as to produce the microorganism organic bacterium fertilizer. The product can be used as a normal microorganism bacterium fertilizer, can improve the agricultural crop output by 3% or more, and achieves the goals of soil structure modification, soil pH value adjustment, fertilizer cost reduction, output and quality improvement, and pesticide residue degradation, and the like. The method provided by the invention has the advantages of mature and practicable technology route, abundant and wide source of raw material for production, low cost, and convenient preparation; has production technology innovation and an application promotion value, solves the problems of resource waste and secondary pollution existing in the straw cyclic utilization, increases the economic income for farmers, and achieves the goal of agricultural development.

The invention relates to a culture pond system realizing rotational-flow dirt collection. The culture pond system comprises a circular or a regularly polygonal pond body, wherein the center of the pond body is tapered downwards to a certain extent; a rotational-flow dirt-collecting device is arranged at the bottom of the pond body and is provided with a motor, the motor drives a horizontal supporting rod to rotate, and one end of the supporting rod is connected with a propeller; the distance from the propeller to the bottom of the pond body is smaller than 1 m; a supporting column is arranged below the motor and fixedly connected with a dirt collecting tank, the dirt collecting tank collects solid particles and is communicated with a bottom particle discharge pipe, and sewage is discharged out of the pond body through the bottom particle discharge pipe; a clean water discharge pipe is arranged on the side wall of the pond body, and a water inlet pipe and an aeration oxygenation pipe are arranged in positions near the side wall of the pond body; upper-layer clean water discharged through the clean water discharge pipe accounts for 80%-90% of the total amount of discharged water and flows back to the pond body through the water inlet pipe after being purified by a water purifying system; sewage discharged through the bottom particle discharge pipe accounts for 10%-20% of the total amount of discharged water.

The invention discloses a straw/ash magnesium-oxy-chloride cement hollow slat or hollow building block and a preparation method thereof. The preparation method comprises the steps of: firstly, adding a modifying agent into an MgCl2 solution prepared by a normal bittern's slice to be stirred uniformly, wherein the mass ratio of MgO to MgCl2 is 5:1-6:1, the ash accounts for 10-30 percent by mass of the MgO and the modifying agent accounts for 0.5-2 percent of MgO; secondly, mixing and stirring with uniformly stirred MgO powder and ash to obtain a magnesium-oxy-chloride cement gelled material; thirdly, adding straw fibers into the magnesium-oxy-chloride cement gelled material according to the proportion that the straw fibers account for 10-40 percent of the total volume of the straw fibers and the magnesium-oxy-chloride cement gelled material, uniformly stirring by adding water until the fluidity of a mixture reaches 110-140 mm according to the straw water absorption, and die-filling, vibrating and molding or reducing the water to binder ratio and then pressurizing and molding to obtain the straw/ash magnesium-oxy-chloride cement hollow slat or hollow building block after slurry shows better fluidity. The invention has good watertightness, high strength, good temperature and heat insulating effect, resource saving and environment load reduction.

The invention relates to a method for determining the content of oxynitride in air. The method comprises the following steps: continuously enabling air collected in atmosphere with a predetermined flow and at a preset time to pass through a first absorption tube, an oxidization bottle and a second adsorption tube which are connected in series to absorb oxynitride in reaction air; putting an absorption liquid which is reacted with air in absorption reaction in the first and second adsorption tubes into a reaction bottle filled with a diazo reaction liquid for diazo reaction; putting a diazo reaction liquid which is reacted in diazo reaction in the reaction bottle filled with the diazo reaction liquid into a reaction bottle of a coupled reaction liquid for azo reaction; and by taking a blank liquid of a reagent as a reference liquid, determining the absorbancy of the diazo reaction liquid after azo reaction and calculating concentration of oxynitride in air based on a standard work curve, wherein the vertical coordinate and horizontal ordinate of the standard work curve are respectively absorbancy and nitrite concentration. The determining method is convenient and efficient to operate, relatively high in sensitivity, accurate in result and suitable for popularization.

The invention belongs to the field of environment sewage treatment, and particularly relates to a preparation method of an ozone oxidation catalyst for removing organic matters and total nitrogen in water. Mesoporous alumina is used as a carrier; metallic oxides are doped and loaded onto the surface of the carrier of alumina and an inside pore passage structure; a prepared catalytic material is porous; the specific surface area is large; the adsorption performance is high; certain mechanical strength and physicochemical stability are realized; a novel ozone oxidation catalyst is obtained; ozone molecules are adsorbed at the pore passage at the catalyst surface and are in full contact with active ingredients and contaminants; the utilization efficiency of ozone molecules is greatly improved; the ozone reaction speed is improved; the organic matters and total nitrogen in industrial wastewater can be effectively removed.

The invention relates to the technical field of iron ore tailings treatment, in particular to an aerated concrete block produced by iron ore tailings and a preparation method thereof. The aerated concrete block produced by iron ore tailings is characterized in that the aerated concrete block is prepared by activated iron ore tailings, lime, ordinary Portland cement, gypsum, aluminum powder and water; the weight percentage of the raw materials is as follows: 60% to 65% of the activated iron ore tailings, 17% of the lime, 15% to 20% of the ordinary Portland cement and 13% of the gypsum; the sum of the weight percents of the activated iron ore tailings, the lime, the ordinary Portland cement and the gypsum is 100%; the addition quantity of the aluminum powder is 0.08% of the total weight of the activated iron ore tailings, the lime, the ordinary Portland cement and the gypsum; and the ratio of water and materials is 0.6-0.65. The aerated concrete block produced by iron ore tailings and the preparation method thereof solve the problems of large quantity and high cost of building material cement by using iron ore tailings as main raw materials and secondary pollution caused by recycling of iron core concentrate currently.

The invention discloses a preparation method of biological activated carbon capable of safely adsorbing cadmium in water. The preparation method of the biological activated carbon capable of safely adsorbing cadmium in the water comprises the following steps: 1) removing impurities from harvested napiergrass, carrying out air drying, and then sequentially smashing and drying; 2) putting smashed and dried napiergrass into a carbonization furnace, heating to 480-520 DEG C at a rate of 4-6 DEG C/min, and carrying out oxygen-free carbonization reaction for 1.8-2.2 hours while heat preservation is carried out; and 3) cooling the carbonized napiergrass obtained in the step 2) to room temperature, smashing, and sieving, so that the biological activated carbon capable of safely adsorbing cadmium in the water is obtained. The preparation method of the biological activated carbon capable of safely adsorbing cadmium in the water has the advantages that the three problems that the adsorption efficiency is low, secondary pollution can be easily caused and cost is high when the existing adsorption technology is used for treating heavy metal wastewater are solved; meanwhile, carbon in plant waste is stably stored, carbon dioxide release is reduced, and obvious ecological benefit is realized.

The invention relates to the technical field of purifying equipment, in particular to a large-area horizontal air supply type air purifier. The large-area horizontal air supply type air purifier comprises a shell, a prefilter, a double-output-shaft double-wheel four-air-inlet low-noise centrifugal fan, a highlight ionizer, a medium adsorption layer, a catalysis filtering layer, an ozone filtering layer, a low-resistance high-efficiency filter and a light reflection device. The shell is internally provided with an upper cavity and a lower cavity, the prefilter is arranged on one side, close to an air inlet, in the lower cavity, the double-output-shaft double-wheel four-air-inlet low-noise centrifugal fan is arranged in the lower cavity, and a cavity type purifying module is arranged in the upper cavity of the shell. The highlight ionizer is arranged in the middle of the cavity type purifying module which comprises the medium adsorption layer, the catalysis filtering layer, the ozone filtering layer, the low-resistance high-efficiency filter and the light reflection device. The large-area horizontal air supply type air purifier has the advantage that by the aid of the cavity type purifying module, the highlight ionizer, the low-resistance high-efficiency filter and the like, harmful gases such as PM2.5 (particulate matter 2.5), formaldehyde, TVOC (total volatile organic compound) and the like in the air can be cleared efficiently.

An enclosed garbage compressing and transporting apparatus is composed of garbage compressing and baling unit, garbage bale moving and turning-over unit, garbage bales queuing and lifting unit, and a top case for storing garbage bales and loading them on truck.

The invention discloses filter mud containing clean coal and a preparation method thereof. The filter mud containing clean coal comprises braize, filter mud, a combustion synergist, a composite binder, a sulphur-fixing agent and a deodorant. The filter mud is obtained by a cleaning process in a sulfurous method in the sugar industry. The combustion synergist is potash nitrate and sodium chloride. The composite binder is pregelatinized starch, clay and polyvinyl alcohol. The sulphur-fixing agent is calcium hydroxide and sodium carbonate. The deodorant is ascorbic acid and ferrous sulfate. According to the invention, filter mud of a sugar plant is adequately utilized, so that secondary pollution to the environment is avoided and waste is turned to wealth. The clean coal prepared has the advantages of inflammability, higher thermal efficiency, small discharge of harmful gas, high cold and hot strengths, good waterproof performance, low production cost, environmental-friendliness and the like.