36results about How to "Meet the requirements of circular economy development" patented technology

The invention discloses a pyrolysis based resource reclaiming process of a waste circuit board, belonging to the technical field of waste resource reclamation and recycle. The method comprises the following steps: placing a waste circuit board with an electric element detached in a pyrolyzing furnace for thermal cracking; collecting pyrolyzed oil, pyrolyzed gas and pyrolyzed residues generated in the pyrolyzing process; directly introducing the purified pyrolyzed gas serving as gas into a pyrolysis system to provide energy for the pyrolyzing process; polymerizing the pyrolyzed oil and formaldehyde to synthesize pyrolyzed oil-phenolic aldehyde resin; selectively synthesizing carbon functional materials with different shapes and structures by using the prepared pyrolyzed oil-phenolic aldehyde resin as precursor; peeling glass fiber in the collected pyrolyzed waste circuit board residues from a metal layer, and reclaiming glass fiber cloth and metal; and removing carbon on the surface of the separated glass fiber by adopting a partial oxidization method, and preparing a veneer sheet together by the carbon and the synthesized pyrolyzed oil-phenolic aldehyde resin. The process ensures that material reclamation in the waste circuit board forms a closed circulation system, and has high resource reclamation rate.

The invention relates to the technical field of biological engineering and the fields of food and medicaments, particularly provides a method for extracting refined yeast grease from yeast, particularly waste saccharomyces cerevisiae and oil production yeast, and further provides soft capsules prepared by compounding the yeast grease, vegetable grease rich in necessary fatty acid for a human bodyand anti-oxidation grease and a preparation method thereof. The obtained yeast grease composite soft capsules have the effects of reducing serum cholesterol and reducing blood fat; the method for producing the yeast grease by using the waste yeast has powerful results of improving the additional value of the waste yeast and generating higher economic benefit; and meanwhile, by comprehensive utilization of the waste yeast, the problem that wastes pollutes environment is solved, and the requirement of circular economy development is met.

The invention relates to regenerative organic planting soil, and meanwhile, also relates to a preparation method for the planting soil. The regenerative organic planting soil comprises the following components in mass percentage: 70-80 percent of construction waste spoil, 10-20 percent of beer lees, 1-5 percent of withered grass branches and leaves, 0-3 percent of Enteromorpha and 5 percent of animal waste. The construction waste spoil comprises clay and sandy soil, wherein the mass percentage of the clay is higher than that of the sandy soil by 5 percent. The invention also provides the preparation method for the regenerative organic planting soil. The method comprises the following flows of crushing, weighing and metering, fermenting, testing, packaging and delivering into a finished products warehouse. According to the regenerative organic planting soil, spoil generated after construction waste is recycled and processed is made into the organic planting soil, therefore, not only are building material byproducts recycled but also the social issues that the land is occupied and the environment is polluted can be solved. Moreover, the preparation method for the regenerative planting soil is advanced in process and is mature in technology. Recycling of resources is realized, and the requirement of the state circular economy development is met.

The invention discloses a technological method for producing copper rice grains by recovering waste wires and cables based on an improvement of the prior production mode that the waste wires and cables recover copper raw materials. The technological method has low cost, small energy consumption, less discharge and no waste pollution, meets the requirement of circular economy development, and can obtain a copper rice grain product the purity of which reaches 99.9 percent. The technological process comprises the steps of classification inspection, loading, primary crushing, secondary crushing, and vibration separation; the angle of a vibration sieve is adjusted according to the content of copper and the wire diameter, and the copper rice grains and plastic are subjected to optional separation through vibration sieving; a material from a mixed material port flows into an air suction pipe, and is sent for secondary crushing through a circulating air pipe; the air suction pipe above the vibration sieve sucks plastic fibers and other dust in the space of the vibration sieve to a dust collector for treatment; the qualified copper rice grains obtained at a copper outlet flow into a packing bag; and the finished product inspection is performed, namely the obtained copper rice grains enter a warehouse through the inspection.

The invention discloses a straw fiber silicon-plastic composite building formwork and a method for preparing the same. The proportion of the formulation of per 100 kilogram of straw fiber silicon-plastic composite building formworks is as follows: 28 to 39 kilograms of plastic waste, 35 to 55 kilograms of plant straw short fibers, 15 to 25 kilograms of fly ash and 1 to 2 kilograms of auxiliary agent. The preparation method comprises the following steps of: fiber treatment of straws; mixing; high-speed fusing and extruding; mould pressing; cooling; and product package and storage. The straw fiber silicon-plastic composite building formwork and the method have the advantages of low production cost, high cost performance, good product quality, waste recycling, energy conservation and environmental protection, accordance with the development requirements of recycling economy and so on.

The invention relates to a ceramic-based water-permeable brick using total tailings as raw material and a preparation method, and belongs to the technical field of inorganic non-metallic materials. Asintered water-permeable brick is prepared from the following chemical components in percentage by weight: 64 to 72% of SiO2 (silicon dioxide), 8 to 12% of Al2O3 (aluminum oxide), 8 to 10% of Fe2O3 (iron oxide), 3 to 7% of CaO (calcium oxide), 1.5 to 3.5% of MgO (magnesium oxide), and 3 to 5% of K2O (potassium oxide) and Na2O (sodium oxide). The main crystal phase of the prepared sintered water-permeable brick is quartz; the secondary phases are feldspar, diopside and mica minerals; the sintered water-permeable brick also contains a small amount of serpentine, amphibole and tremolite minerals.The sintered water-permeable brick has the advantages that the properties of the sintered water-permeable brick prepared by the whole raw material sintering method are better than the properties of the cement-based water-permeable brick, so that the range of the raw materials of the sintered water-permeable brick is expanded, and a novel path is opened for the high-value utilization of the tailings; while the tailings are recycled at high efficiency, the sintered water-permeable brick with high strength, durability and anti-freezing and thawing property is obtained; the positive function is realized on the reutilization of resources and the protection of ecological environment.

The high-strength utilization mode of the land in China accelerates the deterioration of a soil function, and soil pollution is very serious due to excessive application of chemical fertilizer and agricultural products. The crop yield declining and food safety incidents caused by soil degradation and soil pollution take place frequently and cause serious threats to people's health. The developmentof an eco-friendly, cheap and high-efficiency soil conditioner for improving soil fertility and reducing soil pollution is extremely urgent. The invention discloses a preparation method of a multifunctional soil improving agent. The preparation method comprises mixing waste biomass and a certain amount of attapulgite and modifying the mixture under specific conditions to obtain the multifunctional soil improving agent. The preparation method has simple processes. The multifunctional soil improving agent is renewable and eco-friendly, realizes a low cost, is rich in nutrients such as trace elements necessary for crop growth and can be used as organic fertilizer and a contaminated soil repairing agent.

The invention belongs to the field of nanometer technology, and particularly relates to a boric sludge comprehensive utilization method for preparing nanometer magnesia and nanocrystalline iron oxide. The boric sludge comprehensive utilization method is carried out according to the following steps of: pressing and leaching boric sludge in a hydrochloric acid system at a low temperature; filtering and separating to obtain magnesium chloride and ferric chloride leachate and borosilicate-rich residue; adding MgO or Fe2O3 to the magnesium chloride and ferric chloride leachate to adjust the pH (Potential Of Hydrogen) of the leachate; adding H2O2 to oxidize bivalent ferrous ions in the leachate into ferric ions during precipitating, in order to precipitate and separate the iron ions in the leachate in a form of ferric hydroxide; filtering and separating to obtain an Fe(OH)3 precipitate and a magnesium chloride solution; roasting the obtained Fe(OH3) precipitate to obtain Fe2O3 powder; and directly pyrolyzing the obtained magnesium chloride solution, thus obtaining the nanometer MgO powder and a hydrochloric acid solution, wherein the hydrochloric acid solution can be returned to be recycled. The boric sludge comprehensive utilization method has high leaching efficiency, enables the leaching time to be reduced, saves the energy, reduces the exhaust emission, realizes non-waste clean production in the whole process, and is a novel typical green and clean production process.

The invention discloses a surfacing compound furnace roller transporting billets to a heating furnace. The surfacing compound furnace roller comprises a roller shaft and a roller body, wherein, the roller body is fixed on the roller shaft by roller shoulders at the two ends; the roller body is provided with an air hole; a surfacing layer is arranged on the roller body. The invention changes the originally single casting body into a complex of casting, forging and surfacing. During the process of surfacing and compounding, fusion bonding is carried out on the welding materials and the roller body to form the surfacing layer which has a stable material structure and fine crystal grains. In use, the surfacing compound furnace roller eliminates worldwide problems such as roller surface accretion, dead burning and the like in steel industry; simultaneously, surfacing can be continued after the surfacing layer is worn, thus corresponding with the development requirement of recycling economy and improving the service life of the furnace roller.

The invention discloses a method for preparing fattening feed for river crab in Taihu Lake, the feed comprises the following components by weight percentage: 3-5% of peanut meal, 15-20% of domestic fish meal, 35-40% of soybean meal, 18-20% of wheat, 4-5% of rice bran, 10-15% of rapeseed meal, 2% of soya-bean oil and 4% of premix. The method comprises the following steps: 1)performing superfine grinding on peanut meal, domestic fish meal, soybean meal, wheat, rice bran and rapeseed meal, sending to a mixing warehouse of a mixer in order; 2)directly adding soya-bean oil and the premix in the mixing warehouse of the mixer; 3)turning on a mixer for stirring for 8-10 minutes to prepare a mixture, sending the mixture into a pelleting bin; 4)preparing the slaking particles by the mixture in the pelleting bin through a granulator under high temperature steam effect, sending the slaking particles to a stabilizer and cooling to normal temperature in a stable mode; and 5)grading for processing the cooled particles by a grading sieve, then sealing and packaging according to required weight. According to the invention, the preparation cost is low, the feed nutrition is comprehensive and safe, anaphase growth of the crab is fast, and crab cream can be greatly grown.

The invention belongs to the field of preparation of water treatment agents, and relates to a method for preparing polymeric ferric sulfate. An acidic ferrous solution is produced to obtain polymeric ferric sulfate under the action of an oxidant in the presence of a catalyst and an auxiliary catalyst, wherein the auxiliary catalyst is urea. The method has the beneficial effects that an acid-washed waste liquid is used as a raw material, the waste resource utilization is realized, the urea is oxidized to produce carbon dioxide and nitrogen to achieve the purposes of non-residue and non-emission, the environmental protection requirement and recycling economy development requirement are met, and the production efficiency is greatly improved by using the urea as the auxiliary catalyst.

The invention discloses an inorganic mixture and a preparation method thereof. The inorganic mixture comprises the following components in parts by weight: 10-38 parts of waste ceramic tile fine aggregate, 55-86 parts of construction waste recycled aggregate, 4-7 parts of cement and 5-9 parts of water, wherein the particle size d of the waste ceramic tile fine aggregate is larger than 0 and smaller than or equal to 5 mm; the construction waste recycled aggregate comprises first-particle-grade aggregate with a particle size d larger than 0 and smaller than or equal to 5 mm, second-particle-grade aggregate with a particle size d larger than 5 and smaller than or equal to 10 mm and third-particle-grade aggregate with a particle size d larger than 10 and smaller than or equal to 31.5 mm; and aweight ratio of the total weight of the waste ceramic tile fine aggregate and the first-particle-grade aggregate to the weight of the second-particle-grade aggregate to the weight of the third-particle-grade aggregate is (3.8-4.2): (1.8-2.2): (3.8-4.2). The inorganic mixture prepared from waste ceramic tile construction waste is excellent in mechanical property and remarkably enhanced in durability, and is a green and environment-friendly novel building material.

The invention discloses a method for modifying asphalt by using pyrolytic oil heavy fraction of a waste printed circuit board. The crushed pyrolytic oil high-temperature heavy fraction powder of the waste printed board, which is used as a modifier is added into the asphalt so as to improve the high temperature performance of road asphalt, and greatly improve rolling resistance and stability of the road asphalt; the high-temperature fraction in the pyrolytic oil of the waste printed circuit board is extracted by fractionation, and is crushed and sieved at high temperature, heavy fraction powder of which the grain size is greater than 200 meshes is used as the asphalt modifier, and 2 to 10 weight parts of pyrolytic oil heavy fraction of the waste printed circuit board, which is used as the modifier is added into 90 to 98 weight parts of petroleum asphalt at the temperature of between 130 and 160 DEG C to form a mixture and the mixture is stirred under the condition of heat preservation for 0.5 and 1 hour to form the modified asphalt; and in the method, all components of a liquid product which is obtained after a circuit board is treated by a pyrolysis method are utilized, the performance of asphalt is improved and the cost of the modified asphalt is reduced.

As economy grows and food safety incidents caused by soil contamination occur frequently, demand for culture substrates required by production of pollution-free green vegetables is increased day by day. At present, a soilless culture substrate mainly uses non-renewable resources such as vermiculite and perlite, so that development of a potential renewable culture substrate is particularly important; and untimely or improper processing of a large amount of waste biomass (livestock and poultry manure, straw and the like) in China causes serious environmental pollution. The process obtains the soilless culture substrate by mixing the waste biomass and a certain amount of quicklime, performing hydrothermal treatment under specific conditions, and performing solid-liquid centrifugation. The process provided by the invention adopts the waste biomass to prepare the soilless culture substrate, the preparation process is simple, and the costs are low; and the substrate is not only rich in nutrients such as microelements necessary for crop growth, but also can improve utilization efficiency of fertilizers by crops.

The invention belongs to the field of remediation of water environment, and specifically relates to a pre-treatment method of water supply plant iron-aluminum mud. The pre-treatment method comprises the following steps: injecting water into a water supply plant iron-aluminum mud culture device, enabling the final liquid level to be slightly higher than the water supply plant iron-aluminum mud, constructing a closed system, carrying out intermittent aeration culture on the closed system for at least four months, and then uniformly mixing, wherein the water supply plant iron-aluminum mud culturedevice comprises a container, a gravel layer, the water supply plant iron-aluminum mud and an aeration head, the gravel layer is arranged at the bottom part of the container, the water supply plant iron-aluminum mud is arranged above the gravel layer in the container, and the aeration head is arranged in the gravel layer and is communicated with the outer part of the container through an air pipe. According to the pre-treatment method disclosed by the invention, the water supply plant iron-aluminum mud can be deeply purified, most of active nitrogen and organic matters of the water supply plant iron-aluminum mud can be removed, a potential risk caused by recycling of the water supply plant iron-aluminum mud during a natural surface water environment remediation process can be further reduced, the adsorption capacity of the water supply plant iron-aluminum mud is tend to be improved, and enrichment of functional bacteria related to carbon-nitrogen cycling can be promoted; the process is simple, the cost is low, the operation is convenient, and resource utilization of waste is promoted.

The invention relates to the technical field of agricultural fertilizer manufacturing, in particular to an amino acid trace element type water-soluble fertilizer as well as a preparation method and an application thereof. The amino acid trace element type water-soluble fertilizer is prepared from the following raw material components in parts by weight: 600 to 800 parts of citrus processing waste fermentation liquor, 400 to 500 parts of 40 percent amino acid powder, 150 to 200 parts of biochemical potassium fulvate, 175 to 205 parts of calcium nitrate, 100 to 125 parts of magnesium nitrate, 50 to 70 parts of potassium nitrate, 140 to 160 parts of liquid efficient agent, 6 to 10 parts of emulsifier, 6 to 10 parts of scale remover and 2 to 4 parts of auxiliary agent. The amino acid trace element type water-soluble fertilizer is rich in trace elements, and can promote the growth and development of plants, improve the resistance, increase the yield and quality and improve the soil structure by topdressing in the middle and later periods of crop growth.

The invention discloses organic fertilizer based on Chinese herbal residues. The organic fertilizer is prepared from 50-60 parts by weight of the Chinese herbal residues, 20-30 parts by weight of cropresidues, 15-25 parts by weight of livestock manure and 1-2 parts by weight of JT strains. The Chinese herbal residues are combined with the crop residues, the livestock manure and the JT strains, sothat waste utilization of the Chinese herbal residues is realized, and resources are saved; soil fertility is improved, and soil is improved; the organic fertilizer further has the effects of killingbacteria and controlling pest and disease damage and meets development requirement of circular economy.