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50results about How to "Solve the problem of raw materials" patented technology

Control system and technology of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds

The invention discloses a control system of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds. The control system comprises hedgerows, grass ditches, multilayer percolation ponds and denitrification walls, wherein the hedgerows are planted along terrace edges on a sloping field and used for wind prevention and sand fixation and water and soil erosion prevention; the grass ditches are excavated along lower edges of the sloping field and are further used for sediment precipitation and reserved water reuse; the multilayer percolation ponds are arranged between natural water areas and the grass ditches and in parallel with the grass ditches and used for absorbing phosphorus and nitrogen in water overflowing from the grass ditches; and the denitrification walls are arranged outside the natural water areas and on convergence paths of shallow surface water and used for denitrificating nitrate nitrogen in the shallow surface water into nitrogen. According to the control system and a technology of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds, technologies of the hedgerows, grass ditches, multilayer percolation ponds and denitrification walls are combined, and simultaneously, a same surface runoff of non-point source pollution is processed differently in different periods in an actual application process, so that processing loads can be reduced, and nutrient substances and water resources can be recycled.
Owner:TSINGHUA UNIV

Middle-manganese high-silicon low-fluorine smelting type welding flux

The invention discloses a medium-manganese high-silica low-fluorine smelting soldering flux, which belongs to the field of welding in the mechanical industry. The medium-manganese high-silica low-fluorine smelting soldering flux comprises the following effective compositions in portion by weight: 21 to 26 portions of MnO, 36 to 40 portions of SiO2, 4 to 8 portions of CaF2, 15 to 21 portions of CaO, 3 to 5 portions of TiO2, 3 to 5 portions of MgO, less than or equal to 8 portions of Al2O3, and less than or equal to 1.8 portions of FeO. The medium-manganese high-silica low-fluorine smelting soldering flux has the characteristics that poor manganese ore (namely low-grade manganese ore) can be utilized for production, the cost is low, the application scope is wide, various quality and technical indexes of the medium-manganese high-silica low-fluorine smelting soldering flux can meet the pertinent regulations of F4A2-H08A in the GB / T 5293-1999, and so on and the medium-manganese high-silica low-fluorine smelting soldering flux can be widely applied to union melt welding, semiautomatic welding, electroslag pressure welding, copper welding, pressure welding of vertical reinforcements and so on. in the process of equipment manufacturing in the fields of machine manufacturing, the petrochemical industry, coal metallurgy, mines, buildings, electric power, the military industry, aerospace, marine engineering, and so on.
Owner:永州市兴发电熔科技有限公司

Uniform ultra-microporous activated carbon for gas separation and preparation method of uniform ultra-microporous activated carbon

The invention relates to uniform ultra-microporous activated carbon for gas separation and a preparation method of the uniform ultra-microporous activated carbon. According to the technical scheme of the preparation method, mixing semi-coke with KOH in a mass ratio being 1: (0.01-0.2), adding water and an activating aid to impregnate the mixture for 1-36 h; increasing the temperature to 800-950 DEG C in a programmed manner under N2 protection, controlling thermal decomposition, and introducing water for activation of part of steam for 0.5h-1.5h; finally, washing the mixture with acid and water until the mixture is neutral to obtain the uniform ultra-microporous activated carbon. The pore size is distributed centrally between 0.45 and 0.55 nm, the pores belong to ultra-micropores and have microporosity of 70% or more, and the adsorption capacity of hydrogen is 77cm<3>/g or higher. The semi-coke is taken as a raw material, low in price and low in energy consumption and needs not to be carbonized; an activation method integrates KOH impregnation pretreatment and activation of part of steam, little KOH is consumed, and the activation method has the characteristics of being low in cost and pollution, helpful for reducing corrosion of equipment and the like. The activated carbon prepared with the method has the characteristics of uniform pore size distribution, extremely rich ultra-microporous structure and the like, and can be used in gas separation fields such as pressure swing adsorption hydrogen making or hydrogen storage and the like.
Owner:WUHAN UNIV OF SCI & TECH

Cultivation material composition for producing agaricus bisporus by using hybridized Pennisetum alopecuroides

InactiveCN102417414AFavorable to the development of artificial cultivationExpand production scaleFertilizer mixturesAgaricusCaladium
The invention discloses a cultivation material composition for producing agaricus bisporus by using hybridized Pennisetum alopecuroides, comprising 70-90 weight portions of hybridized Pennisetum alopecuroides, 10-20 weight portions of dry cow dung, 1.0-1.5 weight portions of calcium superphosphate, 0.5-1.0 weight portions of urea, 0.40-0.60 weight portions of ammonium hydrogen carbonate, 1.5-2.0 weight portions of lime, and 2.0-3.0 weight portions of gypsum. According to the invention, straw or wheat straw, maize straw can be most or all replaced by the hybridized Pennisetum alopecuroides to cultivate agaricus bisporus; the advantages of high yield, good quality and easy obtainment of raw materials are achieved; the invention is beneficial to solve the raw material problem in regions where has less resource of straw and cow dung; the invention can open up a new approach for the developing direction of the hybridized Pennisetum alopecuroides in a Pig-Methane-Forage system of large-scale farms; the energy waste is reduced, the environmental pollution is mitigated, and novel culture mediums can be provided for culturing agaricus bisporus. The invention opens up a feasible shortcut for benefiting the development of artificial cultivation of agaricus bisporus and enlarging production scale.
Owner:AGRI ECOLOGY INST FUJIAN ACADEMY OF AGRI SCI +2

Technology for large-scale cultivation of gastrodia elata through improved armillaria mellea bags

The invention discloses a technology for large-scale cultivation of gastrodia elata through improved armillaria mellea bags, which comprises a preparation stage and a later stage. The preparation stage comprises three steps of preparing armillaria mellea bags, selecting gastrodia elata seeds and laying a planting environment, and the later stage comprises a sowing stage, a maintenance stage and a digging stage. The step of preparing the armillaria mellea bags is carried out before the two steps of selecting gastrodia elata seeds and arranging a planting environment. According to the step of preparing the armillaria mellea bags, A1, the armillaria mellea bag comprises two raw material formulas: 1) 70% of fresh weed tree sawdust, 15% of corn flour, 12% of bran, 1% of bean pulp powder, 1% of sesame cake powder and 1% of gypsum powder; the water content is 65 + / -1%; 2) 50% of pleurotus eryngii and flammulina velutipes wastes which cannot be fermented, 30% of coarse sawdust, 18% of bran or corn flour, 1% of soybean meal powder and 1% of sesame cake powder, and the water content is 65 + / -1%. In the operation process, cost, resources and labor force are saved, the growth cycle of gastrodia elata is shortened, economic benefits are improved, and the problem of contradiction between raw materials and ecology in large-scale cultivation is solved.
Owner:HUBEI UNIV OF CHINESE MEDICINE

Rock wool produced by using phosphorous slag and preparation method thereof

The invention discloses a rock wool produced by using phosphorous slag and a preparation method thereof, the rock wool is prepared by phosphorous slag as main raw material and dolomite and bauxite both as auxiliary raw material, wherein the proportions of the raw materials by weight part are calculated as below: 60-85 parts of phosphorous slag, 1-8 parts of dolomite and 10-25 parts of bauxite. Compared with the current method for producing rock wool with natural volcanic rock or volcano metamorphic rock, the method according to the invention realizes the production of the rock wool by using the phosphorous slag as raw material, which not only settles the raw material problem about rock wool heat-preserving material during the production in regions without natural volcanic rock or volcano metamorphic rock, but also widens the comprehensive utilization scope of industrial solid wastes such as the phosphorous slag and the like; adopting the method can effectively utilize the phosphorous slag and other industrial solid wastes to develop novel product with high added value, conforming to the requirements of policies related to cyclic economy as well as energy conservation and pollution reduction, and simultaneously achieving excellent development prospect. The rock wool produced according to the method has the advantages of good fireproof and heat preservation performance, long use time and the like, and is particularly suitable for the use as heat preservation material in the industries such as heat preservation of building energy-saving wall, chemical industry, building material, etc.
Owner:贵州省建筑材料科学研究设计院有限责任公司 +1
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