36results about How to "Reduce landfill volume" patented technology

The invention relates to pet cat litter and its preparation method, which comprises preparing organic base-material 20- 60%, clay 30-80%, binder 0-10%, water absorber 0-20%, surface adsorption substance0- 5%, crushing organic base-material to 30 screen mesh bulkload, processing clay to powder finer than 200 screen mesh, picking organic base material and clay proportionally to making cat litter base body, mixing and stirring the remaining material to making mixed covering material, placing cat litter base body in high-velocity rotating vibration machine, rotating making hydrosphere seeping to the surface of base body, then adding mixed covering material, vibrating slightly for mixing, then sifting and drying, sifting out powder. The inventive cat litter has good deodorant effect, good conglobation property after using, and waste cat litter can combust in favor of environment protection.

The invention relates to a garbage burning fly ash sintering harm-eliminating resource-utilization treatment technology. According to the invention, garbage burning fly ash is mixed with premixed coal and auxiliary materials; the mixture is granulated and shaped; and the material is dried and is sintered in a rotary kiln. During the sintering process, when the temperature is increased and a coal ignition point is reached, the premixed coal is spontaneously combusted. Therefore, external coal dose can be reduced. Initial combustion of the premixed coal can provide a reductive atmosphere, such that dechlorination and detoxification of dioxin in fly ash can be benefited. Large amount of gas is produced by subsequent combustion, such that dust pores and holes are produced on inner and outer parts of the sintered body, and heavy metal volatilization can be promoted, and fly ash sintered body with low heavy metal content and leaching amount can be obtained. The sintered body has no potential harm to the environment, such that fly ash harm-eliminating and resource-utilization are sufficiently realized. During the processing process, smoke and secondary fly ash production amounts are low, and heavy metal and acidic component contents are high. In deacidification and heavy metal stabilization processes, agent utilization rate is improved. Compared with a traditional original fly ash curing/stabilizing process, a landfill amount can be reduced by 80-90%, such that pressure caused by serious landfill space shortage can be effectively relieved.

The invention discloses a method and device for treating waste incineration fly ash through cooperation of metallurgy waste residues, and relates to the field of treatment of solid wastes. The methodfor treating the waste incineration fly ash through the cooperation of the metallurgy waste residues comprises the following steps that the waste incineration fly ash, mineral auxiliary materials anda crystallization nucleation agent are added into blast furnace slag to be subjected to melting separation, and secondary smoke gas and glass solidified bodies are obtained; and the secondary smoke gas and sintering machine head dedusting ash are mixed and then are introduced into treatment water to obtain a treating fluid, and the treating fluid is separated to obtain a filtrate and filter residues. According to the method for treating the waste incineration fly ash through the cooperation of the metallurgy waste residues, chlorine, silicon and aluminum elements can be effectively recycled under the premise of heavy metal solidification. The invention further provides the device for treating the waste incineration fly ash through the cooperation of the metallurgy waste residues based on the method for treating the waste incineration fly ash through the cooperation of the metallurgy waste residues.

The invention discloses an integrated treatment process for clindamycin hydrochloride production wastewater. The process comprises the following steps: performing triple-effect evaporation and concentration on the clindamycin hydrochloride production wastewater, performing centrifugal separation, feeding coarse salts produced by centrifugal separation into a salt refining workshop, collecting the mother solution to be used for extracting phosphate, and repeatedly performing dissolution, evaporation and centrifugal separation on the coarse salts in the salt refining workshop, thereby obtaining high-purity chlorine salts; washing by ethanol, thereby obtaining the finished chlorine salts; collecting the produced mother solution to be used for extracting phosphate; performing evaporation and concentration on the phosphate mother solution, centrifuging and washing, thereby obtaining the phosphate; rectifying the scrubbing solution, recycling the methanol, feeding the distillation residues into a hazardous waste treatment center, merging the foul condensate produced by multiple-effect evaporation and crystallization mother liquor produced by centrifugal separation, homogenizing, and performing anaerobic and aerobic biological treatment and advanced treatment. The method provided by the invention is an integrated method for combining multiple-effect evaporation, methanol rectification and biological treatment and has the characteristics of reasonable resource utilization, low cost, simplicity and convenience in operation, stable operation and the like.

The invention discloses a comprehensive recycling and harmless disposal method for zinc hydrometallurgy high leaching residue. The method comprises the following steps that firstly, the zinc hydrometallurgy high leaching residue is floated for silver recycling, flotation tailing pulp is obtained, and after pressure filter, tailing pressure filter residue is obtained; secondly, water is added to the tailing pressure filter residue for stirring and slurry mixing, and a stabilizing agent is added for stirring to prepare adjusting slurry; and thirdly, the adjusting slurry is subjected to pressurefilter, secondary pressure filter liquid and secondary pressure filter residue are obtained, and the secondary pressure filter residue serves as stabilizing high leaching residue for landfill treatment. Through the method, silver is recycled firstly, meanwhile, floating achieves the effect of slurrying and washing of water soluble zinc, the high leaching residue subsequent stabilizing treatment pressure is reduced, consumption of a stabilizing reagent can be obviously reduced, the landfill amount of subsequent landfill treatment can be reduced, the subsequent treatment operation is obviously simplified, and the transport amount is smaller than mixed curing/stabilizing treatment operation in a paste mixing form.

The invention discloses a comprehensive recovery and harmless treatment method for zinc hydrometallurgy iron vitriol slag and high leaching slag. The method comprises the following steps of (1) addingwater into the zinc hydrometallurgy iron vitriol slag for slurrying and washing, and performing filter pressing on the obtained iron vitriol slag slurry to obtain iron vitriol slag filter-pressing slag; (2) performing flotation on the zinc hydrometallurgy high leaching slag to recover silver, and performing filter pressing on the obtained flotation tailings to obtain tailing filter-pressing slag;(3) mixing the iron vitriol filter-pressing slag and the tailing filter-pressing slag to prepare mixed slag, adding water, stirring and mixing slurry, and adding a stabilizer and stirring to prepareadjusting slurry; and (4) performing filter pressing on the adjusting slurry, and performing landfill treatment on the obtained secondary filter-pressing slag serving as stabilized mixed slag. According to the method disclosed by the invention, the recycling of the valuable element zinc is realized; the pressure of subsequent stabilization treatment of the iron vitriol slag is reduced, the consumption of a stabilizing reagent is obviously reduced, the subsequent treatment operation is simplified, and the transportation amount is smaller than that of mixed curing/stabilization treatment operation in a paste stirring form.

The invention discloses a household garbage incineration fly ash source reduction treatment system and method, and the treatment system comprises a deacidification reaction tower, a classifier and a chelating agent atomization reactor which are sequentially communicated, the bottom of the deacidification reaction tower is connected with a circulating fan, and household garbage incineration flue gas enters the deacidification reaction tower for deacidification treatment; the bottom ash of the deacidification reaction tower enters the deacidification reaction tower again under the action of thecirculating fan to be circulated, the flue gas subjected to deacidification treatment is classified into fine-particle fly ash and coarse-particle fly ash through the classifier, and the fine-particlefly ash enters the chelating agent atomization reactor to be subjected to chelating stabilization treatment for the first time; and the treated fine-particle fly ash and the treated coarse-particle fly ash are converged and subjected to dust removal treatment and secondary chelating stabilization treatment in sequence. According to the method, the consumption of consumables in the flue gas purification process is reduced, the action efficiency of desulfurization and heavy metal fixing agents is improved, the fly ash yield and harmless treatment cost are reduced, and fly ash reduction and efficient stabilization treatment of heavy metals are realized.

The invention relates to a harmless treatment method for recovering zinc and recovering slag through zinc hydro-metallurgy ammonium jarosite washing. The method comprises the following steps of (1) adding water to zinc hydro-metallurgy ammonium jarosite, carrying out slurry washing, and carrying out filter-pressing on the obtained ammonium jarosite slurry to obtain ammonium jarosite filter-pressing slag; (2) adding water into the ammonium jarosite filter-pressing slag, stirring and mixing, adding a stabilizer, and uniformly stirring and mixing to prepare a regulating slurry; (3) carrying out filter-pressing on the regulating slurry to obtain secondary filter-pressing slag as stabilized ammonium jarosite, and carrying out landfill treatment; and recycling the secondary press filtrate. According to the method, water-soluble zinc is recovered through slurry washing, recycling of valuable elements is achieved, the pressure of subsequent stabilization treatment of the ammonium jarosite is reduced, consumption of stabilization reagent is remarkably reduced, the landfill amount of subsequent landfill treatment is also reduced, and subsequent treatment operation is remarkably simplified.

The invention discloses a hazardous waste incineration system and a hazardous waste incineration method. The hazardous waste incineration system comprises a rotary kiln, a collecting and conveying unit, a plasma melting furnace and a secondary combustion chamber, wherein the rotary kiln is used for incinerating hazardous waste to form residues, the collecting and conveying unit is used for coolingand drying the residues, the plasma melting furnace is used for treating the residues to form glass bodies, and the secondary combustion chamber is used for carrying out secondary fuel treatment on smoke exhausted by the rotary kiln and the plasma melting furnace; and the collecting and conveying unit is connected between a discharging port of the rotary kiln and a feeding port of the plasma melting furnace, an exhaust port of the rotary kiln is connected with the secondary combustion chamber, and an exhaust port of the plasma melting furnace is connected with the secondary combustion chamber. According to the hazardous waste incineration system and the hazardous waste incineration method, the rotary kiln and the plasma melting furnace are combined to treat the hazardous waste, the landfill amount of an incineration project is reduced, land resources are saved, most of the glass bodies generated by the plasma melting furnace can be recycled and used as cement ingredients or building materials or heat preservation materials or craft product materials or the like, and recycling of part of the hazardous waste is achieved.

The invention discloses a cement stabilized macadam mixture doped with waste incineration slag. The cement stabilized macadam mixture is prepared by the following steps: preparing 0-2.36 mm waste incineration slag, cement, fly ash, an excitant and water according to a mass percentage ratio of 32.6%: 6.5%:32.5%:7.8%:20.6%, mixing, pelletizing, curing to obtain 4.75-13.2 mm slag pellets, and uniformly mixing with 0-4.75 mm waste incineration slag, cement, aggregate and water to obtain the mixture. According to the invention, the slag pellet prepared by the invention meets the technical requirements of the existing highway pavement base specification on coarse aggregate, so that the condition that the waste incineration slag cannot be used as the coarse aggregate due to substandard crushing value is changed, the resource utilization rate of the waste incineration slag in the highway base is greatly improved, and the slag pellet conforms to the green ecological characteristic, and is suitable for base layer materials of heavy, medium and light traffic pavements of roads of two or less levels; and the the slag pellet is used for replacing part of coarse aggregate of the cement stabilized macadam mixture, so that the use of natural aggregate is reduced, and the environmental protection is promoted.

The invention relates to the technical field of hazardous waste treatment, specifically to an air-cooled ash cooling device. The air-cooled ash cooling device comprises an upper shell and a lower shell; the upper shell and the lower shell are welded into a whole; a guiding plate is installed at the feeding position of the upper shell body; a crushing device is installed at the discharging position of the lower shell; a cooling air inlet pipe and a bracket are installed in the lower shell; cooling plates are installed on the bracket; conveying devices below the guiding plate are installed on the cooling plates; and stirring bars are installed on the conveying devices. According to the air-cooled ash cooling device, traditional water-cooled ash cooling is replaced with air-cooled ash cooling, the water content of ash is reduced, the landfill size is recued, structure is simple, installation is convenient, flowing of the ash can be guided, and the phenomenon that the semisolid ash is solidified and adhered to the cooling plate due to stacking on the conveying devices is avoided.

The invention discloses novel application of waste agents. The novel application involves the application of a FeOOH waste agent, a Fe21.333O32 waste agent, a ferric oxide waste agent and a Ni-Mo waste agent used as a hydro-liquefaction catalyst and a CO shift catalyst in an organic matter conversion process. The waste agents are used as idle resources, the price of the waste agents is farther lower than the price of fresh catalysts, so that the production cost is reduced, but a catalytic effect of the waste agents used as the hydro-liquefaction catalyst or the CO shift catalyst is comparableto a general catalyst effect.

The invention discloses a comprehensive utilization process of city sludge in sintering brick making. The process comprises the following procedure steps: processing city sludge, and performing raw material crushing and screening with a brick making sintering material; performing mixing; performing aging; manufacturing blanks; performing piling; performing sintering in a kiln; and performing cooling and warehouse storage. As city sludge treatment is recombined and designed, the city sludge is firstly converted into a regenerated fuel, the regenerated sludge fuel is combined with the building material sintering industry and is used as one of raw materials of sintered building materials, finally the sludge can be treated and converted into sintered bricks, a novel mode is created in additionto a landfill treatment mode of city solid wastes, the landfill amount can be reduced, demands on land resources can be greatly reduced, original wastes can be turned into wealth, and resource utilization of wastes can be achieved.

The invention relates to the technical field of building materials, in particular to a high-strength alkali-resistant composite brick based on waste reutilization and a preparation method of the high-strength alkali-resistant composite brick. Electrolytic manganese residues and solid waste generated by house demolition are selected as main raw materials, and silicon-calcium resources in the electrolytic manganese residues and the solid waste are fully utilized; solid waste is subjected to grinding and grading treatment, electrolytic manganese residues are ground to expose siliceous components, then manganese residue powder and powder are used for preparing calcined aggregate, the manganese residue powder and fine particles are mixed to form a mixture, the manganese residue powder and coarse particles are ground to form mixed powder, and an additive is added as a gelatinizing agent, so that the consumption of the electrolytic manganese residues and the solid waste is increased; the silicon components in the electrolytic manganese residues interact with materials with different silicon and calcium components in the solid waste, and calcined aggregate, a mixture and a gelling agent are formed respectively. And through extrusion forming, drying maintenance and calcination maintenance, the compression resistance and breaking strength of the composite brick are improved, and the alkali corrosion resistance is enhanced.