80results about How to "Improve the level of resource utilization" patented technology

The invention relates to a treatment method of sludge generated by urban sewage treatment plant and industrial sludge and discloses a sludge treatment method based on hydrothermal carbonization. The sludge treatment method comprises four steps: sludge preheating treatment, hydrothermal carbonization, waste heat recovery and dehydration desiccation. By adopting the sludge treatment method, as the sludge is converted to hydrothermal carbon by adopting a hydrothermal carbonization technology, pathogenic microorganisms in the sludge are completely killed, most heavy metal pollutants in the sludge are dissolved out, and organic toxic substances in the sludge are effectively decomposed, so that the energy recovery utilization rate is high, and the sludge treatment method is clean, environment-friendly, rapid and effective and has high product additional values.

The invention provides a biomass waste hydrothermal processing method and a system thereof. The method comprises the steps that: a material is sequentially subjected to slurrying preheating treatment, high-pressure-steam hydrothermal treatment, and flash evaporation treatment. Steam adopted in the hydrothermal treatment comprises raw steam and secondary steam. According to the secondary steam, with steam pressure difference between hydrothermal reaction devices, steam pressure and temperature equalization of the two hydrothermal reaction devices are finished. Through multilevel pressure equalization between the hydrothermal reaction devices, heat exchange efficiency is improved, and raw steam consumption amount can be reduced.

The invention relates to a method for embedding life waste via anaerobic-aerobic reactor. Wherein, it comprises that embedding anaerobically the life waste, the generated filter water refluxes to the top of embed layer, and recycles the embed gas; refluxing, to reach certain technique standard, stopping refluxing filter water, to ventilate the embed layer; making said embedded layer in aerobic condition, to remove the water and smell gas of waste layer, lead tail gas into filer water to remove ammonia nitrogen; stopping aerobic step; treating waste water, selecting putrefactive waste to be recycled. The invention can reduce cost and improve the quality of filter water.

The invention relates to anaerobic catalytic thermal cracking system and method for waste batteries. The system comprises a lifter, a flow stabilizing bin communicated to an outlet of the lifter, double pneumatic gate valves arranged at the outlet of the flow stabilizing bin, a drying tower arranged below the flow stabilizing bin, a wind blockage valve arranged at an outlet of the drying tower, atubular spiral conveyor communicated to the outlet of the drying tower, a disc feeder arranged below an outlet of the tubular spiral conveyor, a crusher communicated to an outlet of the disc feeder, avalve inserting plate arranged at an outlet of the crusher, a spiral conveyor arranged below the crusher, a charge and discharge barrel communicated to an outlet of the spiral conveyor, a double-drumrotary kiln communicated to an upper transverse hole of the charge and discharge barrel, and a combustion furnace sleeving the double-drum rotary kiln, wherein a lower transverse outlet of the chargeand discharge barrel is communicated to an outlet of the double-drum rotary kiln, and the lower end of the charge and discharge barrel is successively communicated to an unloader and a vertical tubular spiral conveyor. The system provided by the invention can achieve harmless recycling treatment of waste batteries, and is high in degree of automation. Without inert gas protection, the process isfree of secondary pollutant generation or emission.

The integrated biological and gasifying treatment process for dewatered city domestic garbage is the following steps: breaking trash bag; separating; gasifying the separated recyclables capable of being gasified in a gasifying furnace to produce fuel gas; collecting organic matters and refuse percolate and anaerobic fermenting; using the marsh gas generated during fermentation as fuel, drying the marsh gas residue and incinerating in incinerator; and burning the fuel gas in a boiler to provide energy. The present invention has high garbage treating efficiency and benefit and less secondary pollution.

The invention discloses a method for preparing magnetic biochar by a one-step method. The method comprises the following steps: S1, straw pretreatment: drying and crushing plant straws, and screeningparticles with the particle size of 60-30 meshes for later use; S2, iron salt dipping: adding an iron salt solution into the straw particles in the step S1 for dipping, adjusting the pH value to 10-11with an alkali solution, and then carrying out heat preservation dipping; S3, high-temperature pyrolysis: performing suction filtration on the impregnated particles in the step S2, drying, and transferring into an atmosphere furnace for high-temperature pyrolysis to obtain a magnetic biochar crude product; and S4, post-treatment: carrying out suction filtration, cleaning and drying on the magnetic biochar crude product obtained by pyrolysis in S3 to obtain a magnetic activated carbon finished product. According to the method for preparing the magnetic biochar through the one-step method, plant straw serves as a raw material, pyrolysis and magnetization can be achieved through one step to prepare the magnetic activated carbon, the method is simple, and large-scale production is easy to achieve.

The invention discloses a method for landfill gas in-the-field and out-of-the-field combined treatment. A combined treatment device comprises a landfill device and a purification packing tower. The landfill device is arranged in a landfill site, the purification packing tower is arranged outside the landfill site, the landfill device is filled with fresh household garbage incineration slag particles, so that landfill gas undergoes in-situ purification, and a packing layer formed by weathering household garbage incineration slag particles is arranged in the purification packing tower, so as to further perform adsorption purification treatment on the landfill gas having undergone in-situ purification treatment. The technical means of in-the-field and out-of-the-field combination is adopted, carbon dioxide in the gas is fixed while the landfill gas is purified, and the quality of released gas is improved.

The invention discloses a method for producing methane by anaerobic fermentation. Agricultural waste resources are utilized as raw materials for anaerobic fermentation to produce biogas, a small amount of magnetic nanoparticles are added to the fermentation system, and the magnetic nano particles are modified with nano-sized iron oxide particles on the surface so that the iron oxide particles havedifferent types of charges, which can promote the interaction between acidogenic bacteria and methanogenic bacteria so as to increase electronic transmission, and promote the transformation of organic acid to methane generation path so as to greatly increase the yield of methane. According to the present invention, nano-materials and agricultural waste resource utilization are combined, and a newapproach is opened for improving the level of waste resource utilization and breaking through the bottleneck of anaerobic fermentation technology.

The invention relates to a treatment system and method for domestic waste. The treatment system comprises a pretreatment device, a revolving bed pyrolyzing furnace, an organic waste hydrolyzing device and an oil gas direct-burning boiler, wherein the pretreatment device comprises a waste inlet, a combustible outlet and an organic compound outlet; the revolving bed pyrolyzing furnace comprises a pyrolyzing raw material inlet, a high-temperature oil gas outlet and a pyrolytic carbon outlet; the pyrolyzing raw material inlet is connected with the combustible outlet of the pretreatment device; the organic waste hydrolyzing device comprises an organic compound inlet and a hydrolysate outlet; the organic compound inlet is connected with the organic compound outlet of the pretreatment device; the oil gas direct-burning boiler comprises a high-temperature oil gas inlet and a superheated steam outlet; and the high-temperature oil gas inlet is connected with the superheated steam outlet of the revolving bed pyrolyzing furnace. According to the treatment system disclosed by the invention, the reducing effect of waste pyrolyzing can be sufficiently achieved, the innocuity and reducing of combustible components are realized, and degradable organic compounds can be treated by a hydrolyzing method; and various waste treatment techniques are combined, so that the purpose that the domestic waste is thoroughly and effectively treated is realized.

The invention discloses a steam self-supply system for producing sodium nitrate/sodium nitrite, which is suitable for preparing sodium nitrate/sodium nitrite. A desalination water tank is connected with a waste heat boiler through a coal economizer, and the waste heat boiler is connected with an ammoxidation reactor; the coal economizer is communicated with a crystallizer through an alkaline absorber, a preheater, an I-effect evaporator and an II-effect evaporator; the preheater is connected with the desalination water tank; a converter is respectively connected with the I-effect evaporator and a centrifugal machine; the II-effect evaporator is respectively connected with an alkaline dissolving workshop section and the crystallizer; the alkaline dissolving workshop section is connected with the centrifugal machine through a condenser and the crystallizer. The steam self-supply system is remarkable in energy saving benefit, convenient for process regulation and pollutant discharge reduction, high in degree of automation, remarkable in steam saving effect and high in recycling ratio.

The invention relates to a method for manufacturing a waste plastic mulching film picking and bundling machine. The machine comprises a rack, an eccentric retractable film picker, a fan, a soil shaking winding mechanism, a land-arc imitated film-removing tooth mechanism, a winding mechanism, a bundling mechanism, a tire assembly mechanism, a hydraulic oil cylinder mechanism and a rolling disc cutter mechanism. The eccentric retractable film picker is arranged at the front lower portion of the rack, the front portion of the eccentric retractable film picker is provided with the fan, and the soil shaking winding mechanism is arranged at the rear portion of the eccentric retractable film picker; the output end of a gear drives the eccentric retractable film picker, the fan and the rolling disc cutter mechanism to rotate through chains with different teeth separately, when uncovered mulching film is lifted to a certain height along a film removing tooth, retractable teeth of the eccentricretractable film picker lift the mulching film, the retractable teeth rotate along with an eccentric drum and gradually get shorter, after the lifted mulching film is taken to the highest point of thefilm picker, all the retractable teeth retract back, the mulching film stays on the retractable film picker, and the fan blows the mulching film to the rotating soil shaking winding mechanism.

The invention discloses a preparation process for producing a baking-free brick from household garbage incineration furnace slag. The preparation process comprises the following steps: mixing the pretreated household garbage incineration furnace slag, mining and mineral separation waste residue and cement according to a ratio, and adopting a high-pressure molding process to prepare the high-strength baking-free brick product after uniformly stirring. The household garbage incineration furnace slag is pretreated, the high-pressure molding process is adopted, the utilization of the household garbage incineration furnace slag in the baking-free brick is realized, a new way is explored for comprehensively using the household garbage incineration furnace slag, the household garbage incinerationfurnace slag treatment pressure in the urbanization process is effectively relieved, and the preparation process has remarkable environment and social benefits.

The invention relates to a method of efficiently purifying and comprehensively utilizing biogas slurry. The method of efficiently purifying and comprehensively utilizing the biogas slurry is characterized by comprising the following steps: adding a purifying agent for a primary sedimentation after pumping excessive biogas slurry at an upper layer of a biogas digester; performing primary filtering after the sedimentation to filter out coarse impurities in the biogas slurry; performing secondary filtering to filter out fine impurities in the biogas slurry; performing a secondary sedimentation after heating the secondarily filtered biogas slurry at a high temperature and filtering the biogas slurry; performing tertiary filtering after the sedimentation to filter out sediments and impurities in the biogas slurry; performing quartus filtering after the tertiary filtering to filter out the fine impurities in the biogas slurry; and storing the treated biogas slurry as manure for roots and leaves of plants or as a plant pest inhibitor. The method of efficiently purifying and comprehensively utilizing the biogas slurry according to the invention has the advantages of high purification degree, wide application of purified biogas slurry and improved resource utilization level of wastes; the purifying agent used in the invention can be recycled after being heated and crystallized, so that cost is lowered; and the method according to the invention has the advantages of no waste discharge, environmental protection, simplicity, large treatment capacity, wide application range and low cost.

The invention provides a method and system for purifying a CO fuel gas through continuous pyrolysis of a carbon-containing organic matter. The system comprises a separation device, a breaking device, a rotary-bed pyrolyzing furnace, a fixed-bed pyrolyzing furnace, a condensing device, an oil-water separation device, a purifying device and a variable-pressure adsorption device. The method comprises the following steps: pretreating the carbon-containing organic matter and conveying to the rotary-bed pyrolyzing furnace for pyrolysis; treating the pyrolysis gas-liquid mixture obtained by the pyrolysis by the condensing device, the oil-water separation device and the gas purifying device to obtain a high-purity CO2 gas and combustible gases such as CH4, CO and H2; conveying the pyrolytic carbon obtained by the pyrolysis together with CO2 obtained by purifying the pyrolysis gas into a pyrolysis reactor of the fixed-bed pyrolyzing furnace for pyrolysis; and conveying the generated CO, alkane gases and the like together with the gases such as CO and H2 obtained by the pyrolysis of the rotary-bed pyrolyzing furnace and purification into the variable-pressure adsorption device to prepare the CO fuel gas. In the invention, large treatment quantity and low oil yield can be realized, the resources are saved, and industrial application is promoted.

The invention relates to a kitchen waste collaborative wet and dry anaerobic digestion treatment system and method. The kitchen waste collaborative wet and dry anaerobic digestion treatment system comprises a kitchen waste receiving hopper, a coarse crusher, a magnetic separator, a star disc sieve, a reducing screw extrusion device, a screw press dehydrator, a sand remover, an impurity removal separator, an oil-water separation device, a wet anaerobic fermentation tank and a dry anaerobic fermentation tank, wherein the oil-water separation device is selected according to the actual oil content of materials. According to the kitchen waste collaborative wet and dry anaerobic digestion treatment system and method, a pulping section of a traditional pretreatment link can be omitted, the problems of equipment abrasion caused by the pulping link, difficult sand and stone separation caused by high solid content of slurry, small flux of pulping equipment and the like are greatly reduced, the collaborative advantages of wet anaerobic treatment for fine waste and dry anaerobic treatment for coarse waste are fully exerted, and an oil removal pretreatment section can be selectively added in combination with the oil content of the materials; and the kitchen waste collaborative wet and dry anaerobic digestion treatment system and method have a series of advantages of high separation efficiency, low equipment abrasion, high organic matter utilization rate, no need of additional water in the process, low sewage yield, land saving and the like.

The invention discloses a system and a method for generating power by means of sludge. The system comprises a drying device, a heat accumulating type revolving bed, a gasification and melting reaction chamber, a heat exchange device and a power generation device, wherein a sludge inlet, a dried sludge outlet, a drying water outlet, a steam inlet and a cooling water outlet are formed in the drying device; a raw material inlet, a pyrolytic water outlet, a pyrolytic oil gas outlet and a pyrolytic carbon outlet are formed in the heat accumulating type revolving bed, and the raw material inlet is connected with the dried sludge outlet; a pyrolytic oil gas inlet, a pyrolytic carbon inlet, a thermal-state synthesis gas outlet and a slag outlet are formed in the gasification and melting reaction chamber, the pyrolytic oil gas inlet is connected with the pyrolytic oil gas outlet, and the pyrolytic carbon inlet is connected with the pyrolytic carbon outlet; a thermal-state synthesis gas inlet, a cool-state synthesis gas outlet, a waste water outlet, a cooling water inlet and a steam outlet are formed in the heat exchange device, and the thermal-state synthesis gas inlet is connected with the thermal-state synthesis gas outlet; a steam inlet, a steam exhaust outlet and an electric quantity outlet end are formed in the power generation device, and the steam inlet is connected with the steam outlet. With the adoption of the system and the method, harmlessness, reduction and recycling of sludge are realized.