456 results about "Rice hulls" patented technology

The invention belongs to the technical field of fuel cell electrode material preparation, and particularly relates to a carbon electrode material for a polypyrrole modified bio-based fuel cell and a preparation method of the carbon electrode material. Comprising the following steps: modifying rice hull low-temperature carbonized powder by sequentially adopting POSS (Polyhedral Oligomeric Silsesquioxane) containing unipolar functional groups and POSS containing polypolar functional groups to obtain modified low-temperature carbonized powder; and carrying out in-situ polymerization on a pyrrole monomer on the surface of the modified low-temperature carbonized powder, and carrying out high-temperature carbonization and hydrofluoric acid corrosion to obtain the polypyrrole modified bio-based fuel cell carbon electrode material. The polypolar functional group POSS not only is beneficial to the in-situ polymerization reaction of pyrrole, but also can form a continuous macromolecular chain, and a net structure is formed on the surface of the whole material. The effect of the unipolar functional group POSS is to improve the stability of the low-temperature carbonized powder in the high-temperature carbonization process, and more importantly, the unipolar functional group POSS is to provide a channel for subsequent hydrofluoric acid corrosion, etch away non-conductive substances and improve the conductivity and specific surface area of the carbon electrode material.

The invention discloses a method for preparing high-modulus sodium silicate and co-producing white carbon black from rice hull ash. The method comprises the following steps: crushing the rice hull ash, and acidizing to obtain purified rice hull ash powder; reacting the purified rice hull ash powder with 5wt%-15wt% of caustic soda generated by bipolar membrane electrolysis to prepare a sodium silicate solution; carrying out neutralization reaction on the sodium silicate solution and 1-15 wt% of sulfuric acid solution under the assistance of ultrasonic waves, and filtering to obtain silicon dioxide silica gel and filtrate; washing and drying the silicon dioxide silica gel to obtain a white carbon black product; and carrying out electrolytic treatment on the filtrate through a bipolar membrane electrodialysis system, and respectively recycling the recovered alkali liquor and acid liquor. According to the method, resource utilization of the rice hull ash and cyclic regeneration of the reaction medium are realized, and a green production process is formed.

The invention belongs to the field of soil solidification, and particularly relates to a method for reinforcing a loess foundation through cooperation of EICP and rice husks. Comprising the following steps: 1, compounding long and short rice hull fibers, and sequentially carrying out alkali treatment activation, coupling agent modification and hydroxypropyl methyl cellulose reinforcement treatment; 2, calcining rice hulls, and grinding to obtain rice hull ash; 3, mixing a composite reinforcing agent obtained by compounding the modified and reinforced rice hull fibers and rice hull ash with loess to be reinforced; 4, mixing the urease extracting solution with a reinforcing solution containing urea and calcium ions, and adjusting the pH value to weak acidity to obtain mixed slurry; and 5, the mixed slurry is sprayed into the to-be-reinforced loess mixed with the composite reinforcing agent, and after grouting is finished, the surface of the soil body is covered with a film and subjected to water spraying maintenance. Through synergistic cooperation of the rice hull fibers and the rice hull ash, the common problems of non-uniform cementation and poor deep reinforcement effect during loess reinforcement by an EICP technology are effectively solved.

The invention discloses a porous carbon preparation method and a continuous fluidized bed system.The porous carbon preparation method comprises the steps that rice husks and bamboo fibers are mixed and smashed, the smashed rice husks and bamboo fibers are dried and then mixed with a composite activating agent solution to be steeped, and a pretreated material is formed; feeding the pretreated material into a first-stage fluidized bed, and carbonizing the pretreated product in a nitrogen atmosphere to obtain a carbonized product; feeding the carbonized product into a second-stage fluidized bed, introducing saturated steam and CO2 gas into the second-stage fluidized bed in stages, and activating the carbonized product to obtain an activated product; feeding the activated product into a third-stage fluidized bed, introducing methane gas into the third-stage fluidized bed in an inert gas atmosphere, and performing micropore surface modification on the activated product to obtain a modified product; and washing the modified product with a hydrochloric acid solution and deionized water in sequence, and carrying out vacuum drying to obtain a porous carbon product. According to the preparation method of the porous carbon, the micropore development efficiency is improved, and continuous production of the porous carbon with high specific surface area and high micropore proportion is realized.

The invention discloses medium and low temperature porous wave-absorbing iron-based composite ceramic and a preparation method thereof. The medium and low temperature porous wave-absorbing iron-based composite ceramic is prepared from the following raw materials in percentage by weight: 10 to 50 weight percent of wave-absorbing functional phase, 20 to 40 weight percent of ceramic matrix, 5 to 15 weight percent of pore forming agent, 5 to 10 weight percent of dielectric loss phase, 0.5 to 1 weight percent of stearic acid, 0.2 to 0.5 weight percent of silane coupling agent and 30 to 34.5 weight percent of binding phase. According to the preparation method, a low-temperature sintering process is adopted for optimization, and the activity of the magnetic loss phase is protected. The iron-based composite ceramic with a gradient porous structure is obtained by adopting a freezing injection molding method, and broadband efficient wave absorption can be realized. The magnetic-dielectric cooperative loss is enhanced, and the limitation of a single mechanism is broken through. Starch or rice hull ash microspheres are used as a degradable pore-forming agent, so that green process and short-process design are realized. The mechanical property and the stability of the iron-based composite ceramic structure are improved, the application scene is expanded, and the cost advantage is achieved.

The invention discloses a preparation method and application of an iron-manganese modified biochar material for remediation of cadmium and arsenic contaminated soil, and relates to the field of new materials.According to the material, rice hull biochar serves as a carrier, and the specific surface area and surface active sites are increased through programmed intermittent ball milling; and the Fe-O / Mn-O bonding modification complex is formed through gradient loading of iron and manganese oxides. The maximum adsorption capacity of the material to Cd < 2 + > and As (V) reaches 71.54 mg.g <-1 > and 49.30 mg.g <-1 > and is 1.65 / 2.53 times that of original biochar, the content of available Cd and As in soil is reduced by 8.98% and 25.2% under the condition that the addition amount is 0.4%, and the passivation efficiency is improved by 1.05 times (Cd) and 9.08 times (As) compared with that of non-ball-milled iron-manganese modified biochar; the material prepared by the method is applied to cadmium and arsenic polluted soil, pollution can be controlled by waste, and the soil can be effectively repaired.

The invention provides a cattle fermentation bed composite padding based on bacterium-enzyme synergistic effect and a preparation method thereof, and relates to the technical field of livestock and poultry breeding, the cattle fermentation bed composite padding comprises a rice hull layer located at the top, a slow release layer located in the middle and a fermentation layer located at the bottom, the rice hull layer comprises hydrophobic modified rice hulls, the slow release layer comprises PLA melt-blown cloth, and the fermentation layer comprises PLA melt-blown cloth. The PLA melt-blown cloth is compounded with microspheres through hot pressing, and the fermentation layer comprises the following components in parts by mass: 0.5-2 parts of aspergillus niger spores, 8-15 parts of bran and 90-110 parts of bagasse. The method has the beneficial effects that turning-free, self-oxygen-adjusting and long-acting fermentation can be realized, and efficient fermentation and long-term stable operation are realized by adopting a three-layer sandwich structure and combining hydrophobic modification, gas slow release and bacterium-enzyme synergistic degradation technologies.

The invention belongs to the technical field of nutritional aggregates, and particularly relates to a core-shell type slow-release water-retention nutritional aggregate as well as a preparation method and application thereof. The method comprises the following steps: 1) mixing a nutrition base material and rice hull powder to obtain first coating layer powder; 2) adding ceramsite and a cementing material into a ball forming mill, and premixing to obtain ceramsite coated with the cementing material; (3) adding a binder and the first coating layer powder obtained in the step (1) into the ball forming mill, continuously premixing, and forming a second coating layer on the surface of the ceramsite coated with the cementing material to obtain a core-shell material; (4) curing the core-shell material; and 5) drying and screening the core-shell material to obtain the core-shell type slow-release water-retention nutritional aggregate. The comprehensive improvement of mechanical properties, water retention, slow release and environmental adaptability is realized.

The invention relates to the technical field of foamed ceramics, in particular to a foamed ceramic and a preparation method thereof. The foamed ceramic comprises the following raw materials in parts by weight: 30-50 parts of waste cathode carbon blocks, 15-30 parts of rice hull ash, 15-30 parts of fly ash, 3-10 parts of calcium carbonate, 3-10 parts of expanded perlite and 2-5 parts of basalt fibers. According to the invention, the waste cathode carbon block is pretreated to form a porous structure, the porous structure and gas decomposed by calcium carbonate are jointly used as a gas source at a high temperature to generate initial pores, and a glass phase formed after rice hull ash activation has certain fluidity during sintering, and can fill pores, adjust pore surface tension and promote uniform expansion of the pores; the basalt fibers are inserted into the matrix in a three-dimensional bracket form, and collapse of pores due to high-temperature shrinkage or gas escape is prevented through physical support, so that the stability and uniformity of the pore structure are ensured, and the heat insulation performance of the foamed ceramic is improved.

The invention relates to the technical field of regenerated rubber preparation, in particular to a preparation method of high-performance regenerated rubber based on modified calcium sulfate whiskers and rice husk charcoal, which comprises the following steps: S1, mixing anhydrous calcium sulfate and absolute ethyl alcohol, pouring into a four-mouth bottle, carrying out ultrasonic treatment for 0.5 hour, heating to 80 DEG C while stirring in a water bath kettle, adding a surface modifier, and stirring for 0.5 hour; heating for 5 hours, centrifugally washing, and drying the final product in a vacuum drying oven for 2 hours to obtain the modified calcium sulfate whisker. S2, preparing modified rice husk charcoal; and S3, mixing the modified calcium sulfate whiskers, the modified rice husk charcoal and regenerated rubber by using an open mill, uniformly mixing, putting into a mold, and tabletting by using a press vulcanizer to obtain the high-performance regenerated rubber based on the modified calcium sulfate whiskers and the rice husk charcoal. The industrial by-product calcium sulfate and the agricultural waste rice husk are used as raw materials and have the characteristics of no pollution and regeneration cycle, the high-performance filler is prepared through a green process, and the production cost is reduced while the rubber performance is improved.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

The invention belongs to the technical field of high-speed railway ballastless track construction, and particularly discloses an anti-crack functional material for ballastless track roadbed slab concrete and a preparation method of the anti-crack functional material. The anti-cracking functional material provides a whole-course expansion effect and delays early expansion by means of a mode of coating calcium oxide with calcium carbonate and compounding magnesium oxide; the protein modified starch is used as a hydration heat regulation and control layer, so that the regulation and control effect of single starch on cement hydration heat is improved, and a compound expanding agent is slowly released; carbonized and expanded rice husks are used as a biomass water-absorbing and anti-releasing material, so that the self-shrinkage and drying shrinkage of the concrete are reduced; the temperature-sensitive microgel material is used as the outermost layer component, the highest temperature value of the roadbed slab concrete is reduced, the temperature drop shrinkage stress of the concrete is improved, and the temperature shrinkage cracking risk of the roadbed slab concrete is inhibited. Various shrinkage stresses of the roadbed slab are accurately regulated and controlled, the limiting and restraining stress of the prefabricated sleeper and the base on the concrete of the roadbed slab is effectively compensated and improved, and the anti-cracking performance of the concrete of the ballastless track roadbed slab is fundamentally improved.

The invention discloses an anti-fracture building concrete material and a preparation method thereof, and relates to the technical field of building materials, the concrete material comprises the following raw materials by weight: 280-380 parts of cement; 500 to 600 parts of fine aggregate; 800 to 1000 parts of coarse aggregate; 1.5 to 3.5 parts of a degradable fiber inclusion; 20 to 40 parts of silica fume; 15 to 30 parts of rice hull ash; 10 to 20 parts of modified natural zeolite; 5-10 parts of an intelligent phase change material; 3-5 parts of a polycarboxylic acid water reducer; 5 to 10 parts of a calcium sulphoaluminate expanding agent; 150 to 200 parts of water; through the elaborately designed material formula, the anti-fracture performance and durability of the concrete are remarkably improved, the introduced degradable fiber inclusion is prepared by wrapping aramid fibers with a starch-based degradable material, and the structure enhances the interface bonding force between the fibers and a concrete matrix and also improves the durability of the concrete. The expansion of microcracks in the concrete is effectively inhibited through the high-strength characteristic of the aramid fibers, and the tensile strength and toughness of the concrete are improved.

The invention provides an agricultural waste composite modified edible fungus culture medium and a preparation method thereof. The agricultural waste composite modified edible fungus culture medium is prepared from the following components in parts by mass: 20 to 30 parts of corn straw, 15 to 25 parts of rice hull, 10 to 20 parts of sawdust, 25 to 35 parts of cottonseed hull, 5 to 10 parts of soybean meal, 0.5 to 2.0 parts of complex microbial inoculant, 3 to 8 parts of bentonite, 1 to 3 parts of chitosan, 1 to 2 parts of gypsum and 1 to 2 parts of lime. According to the invention, the complex microbial inoculants are adopted to carry out solid state fermentation modification on the basic mixture, bentonite and chitosan are compounded into the activated functional slurry, and through the synergistic effect of solid state fermentation and the functional slurry, the granular structure, water retention and air permeability of the matrix are fundamentally improved, and efficient activation and slow release of nutrients are realized; finally, the fruiting period of the shiitake mushrooms is shortened to be within 85 days, the yield is increased by 10% or above, the shiitake mushroom proportion is remarkably increased, and high-value utilization of agricultural waste is achieved.

The invention relates to the technical field of preparation of novel bio-based materials, in particular to a preparation method for producing a rice hull-based high-purity high-modulus sodium silicate solution by taking rice hulls as raw materials. Rural solid waste rice hulls / grass are used as raw materials, combustion is carried out at the fixed low temperature of 700-750 DEG C, generated steam is used for supplying heat to the production or the park, and the combusted rice hull ash contains amorphous silicon dioxide gt; 90%; the method comprises the following steps: activating rice hull ash just out of a chamber and diluted hydrochloric acid (5-10%) to generate polyhydroxy surface modified silicon dioxide active seeds; the method comprises the following steps: dynamically mixing rice hull ash and a 25% NaOH solution according to a molar ratio of (3.25-4): 2, adding 3-7% of active seeds in batches at 105 + / -5 DEG C, and reacting for more than or equal to 3 hours; the high-purity sodium silicate solution with the modulus of 3.25-4.0 is finally obtained through pH segmented regulation (Mg < 2 + > is removed at the pH of gt and 12, and Ca < 2 + > is removed at the pH of 9.5-10) in combination with high-pressure refined filtration; the product is mainly used for preparing nano silicon dioxide, especially for preparing 5nm silicon dioxide dispersion liquid and high-purity electronic grade silicon dioxide as raw materials.

The invention provides a preparation method of artificial oven subsoil. The preparation method comprises the following steps: firstly, mixing shrub ash, rice hull ash and wormwood ash in proportion to prepare plant ash, then mixing calcined and crushed oyster shells and plant ash, adding water, washing and removing impurities to prepare mortar, and then adding loess powder for injection molding; drying at the temperature of 250-350 DEG C, oxidizing at the temperature of 450-650 DEG C and reducing at the temperature of 750-850 DEG C to finally obtain the artificial oven subsoil. According to the method, the natural production process of traditional oven subsoil is simulated, the compound structure and effective component composition of the natural oven subsoil are successfully reproduced, the obtained product is stable in component and quality, the content of heavy metal and pesticide residues meets the safety standard, and the problems that natural resources are exhausted, and the quality of the oven subsoil all over the country is uneven are effectively solved.

The invention relates to the technical field of solid waste treatment, in particular to a zeolite-based porous adsorption material and a preparation method thereof. The zeolite-based porous adsorption material is prepared from light particles and alkali liquor through a zeolitization reaction, and the light particles are prepared from the following raw materials in parts by mass: 30-60 parts of regenerated micro powder, 5-15 parts of red mud, 5-15 parts of glass powder, 10-40 parts of solid waste powder and 5-15 parts of a foaming agent; the regenerated micro powder is cement-based construction waste regenerated micro powder, and the solid waste powder comprises one or more of fly ash, coal gangue and fine coal gasification slag; the foaming agent comprises charcoal and / or rice hull ash. The multi-solid-waste zeolite-based porous adsorption light particles with excellent performance and good economic and environment-friendly benefits are prepared by taking the construction waste regenerated micro powder as a main raw material and synergistically using various solid wastes and the foaming agent.

The invention relates to the technical field of building materials, and discloses a preparation method of biomass aggregate lightweight wall impervious concrete and concrete.The preparation method comprises the following steps that 1, biomass aggregate is pretreated, specifically, a rice hull or straw biomass raw material and a sintering agent are mixed, pressed and formed, sintering in a vacuum furnace to prepare biomass-based wood ceramic spherical particles; (2) aggregate surface hydrophobic treatment: pretreating the biomass-based wood ceramic spherical particles obtained in the step (1) with a surfactant solution, and then carrying out vacuum impregnation treatment with a paraffin-silane composite emulsion; by adopting surfactant pretreatment and a paraffin-silane composite emulsion vacuum impregnation process, a surfactant can reduce the surface tension of an emulsion and promote a hydrophobic component to permeate into internal pores of the aggregate, and a vacuum environment eliminates air resistance in the pores, so that a hydrophobic material and pore walls of the aggregate form firm combination, and the hydrophobic effect is more lasting.

The invention discloses a lithium slag-based geopolymer based on a rice hull ash nano-modified material and a preparation method of the lithium slag-based geopolymer. The geopolymer comprises the rice hull ash nano-modified material and a powder component, the rice hull ash nano-modified material is prepared by the following steps: mixing rice hull ash, alkali liquor and nano silicon dioxide, adding water, and reacting at 150-250 DEG C for 4-6 hours, so as to obtain the rice hull ash nano-modified material. On the basis of a rice hull ash modified material, the geopolymer can be coagulated within 120-200 min, the coagulation time is shortened by 35%, the coagulation time is shortened, the 7d compressive strength can still reach 25Mpa or above, and the 28d compressive strength can still reach 40Mpa or above. In addition, the strength of the geopolymer prepared in each batch is stable and has no obvious fluctuation, and the batch stability of industrial production preparation is realized.

The utility model relates to the technical field of rice production, in particular to an efficient rice polishing machine, and aims to solve the technical problems that rice bran powder is easy to adhere to the surface of a polishing roller, needs to be cleaned at set intervals and is not easy to collect. The upper portion of the polishing barrel is tangentially communicated with a plurality of air inlet pipes, the air inlet pipes are obliquely arranged towards the discharging end of the polishing barrel from top to bottom, each air inlet pipe is communicated with a fan, the inner wall of the polishing barrel is connected with grinding materials, and an impurity discharging opening is formed in the portion, on the lower portion of the polishing barrel, of the side wall of the polishing shell. Under the action of inclined air outlet of the multiple tangential air inlet pipes of the polishing barrel, rice spirally moves towards the discharging end in the polishing barrel and makes full contact with grinding materials in the moving process to be polished, and rice bran powder and rice hulls penetrate through polishing barrel holes to move to the lower portion of the polishing shell and are discharged along with air through the polishing shell.

A method for immobilizing beta-glucanase based on a rice husk-sodium alginate composite carrier belongs to the field of enzyme engineering and biological materials, and comprises the following steps: 1) crushing and sieving rice husks; 2) mixing rice husks and sodium alginate according to a mass ratio of 1: 3-1: 6, and performing ultrasonic dispersion and magnetic stirring to form a carrier solution; (3) adding beta-glucanase into the carrier solution, and reacting for 35-50 minutes at the temperature of 30-35 DEG C; and 4) dropwise adding the enzyme-carrier mixed solution into a calcium chloride solution for curing and forming, and washing and drying to obtain the immobilized enzyme particles. By optimizing the ratio of the composite carrier, when the mass ratio of the rice husks to the sodium alginate is 1: 4, the catalytic activity of the prepared immobilized enzyme under unit mass is obviously higher than that of other ratio groups. According to the method, agricultural waste rice hulls are used as main raw materials, the cost is low, the process is simple, the prepared immobilized enzyme is high in activity, and a new way is provided for industrial application of beta-glucanase.

The ecological native egg packaging box based on rice hull composite buffering comprises a packaging box body and a box cover connected to the top of the packaging box body, a bottom plate is fixedly connected to the bottom of the inner wall of the packaging box body, an inner box body is fixedly connected to the top of the bottom plate, a separation frame is fixedly connected to the inner wall of the inner box body, and buffering materials are filled in the inner box body. According to the ecological native egg packaging box based on rice hull composite buffering, the buffering material is made of polyurethane foam plastic with rice hulls as raw materials, in the transportation process of the packaging box, if the packaging box is collided and impacted, the air bag can be squeezed, and therefore the buffering effect is achieved, and the service life of the packaging box is prolonged. And the buffer material filled in the inner box body can also play a good buffer effect, so that the eggs are prevented from being damaged.

The utility model relates to a rice hull screening device, including device box, still include: a plurality of screening net are fixed in device box inside respectively, cleaning mechanism is through in a plurality of screening net inside, and cleaning mechanism includes first rotary lever, and a plurality of screening nets are through at first rotary lever outside, and a plurality of rotary baffle are fixed to first rotary lever both sides, and a plurality of rotary baffle top are fixed with cleaning brush, and cleaning brush top is pasted with screening net, the utility model discloses a combination through first rotary lever, rotary baffle and cleaning brush, and can drive rotary baffle and cleaning brush rotation with double shaft motor, utilize the cleaning of rotating cleaning brush to be able to carry out to a plurality of screening net surface, avoid the situation that a plurality of screening net appear the block, and, rotary lever still can drive first suction fan blade and second suction fan blade rotation, can be screened with screening net and produce dust and be sucked into water tank downwards, thereby to the collection processing of dust.

The invention relates to a bio-based adsorbent capable of removing microcystic toxins-LR in water, a preparation method of the bio-based adsorbent comprises the following steps: performing steam explosion treatment on rice husks, and then jointly treating the steam-exploded rice husks with sodium hydroxide and sodium trimetaphosphate to obtain rice husks containing phosphate ester groups. The prepared bio-based adsorbent can realize adsorption of microcystic toxins-LR in wastewater, and also has efficient adsorption capacity in the presence of humic acid, calcium carbonate, sodium chloride, magnesium sulfate and other organic and inorganic substances. The adsorption rate of the rice hull powder adsorbent subjected to joint modification on microcystic toxins-LR is obviously higher than that of an original rice hull powder adsorbent, and the rice hull powder adsorbent can quickly adsorb pollutants in water and has a good removal effect on the microcystic toxins-LR within the pH range of an algae culture medium; the potential of adsorbing the microcystic toxins-LR in a microalgae culture environment is realized. Meanwhile, as a typical agricultural waste, the rice husks are turned into wealth through a two-step rapid modification method, and a new way for recycling the rice husks is provided. Therefore, the method for removing the microcystic toxins-LR in the water by utilizing the biomass adsorbent is a good choice, so that the pollution removal of the water body and the reutilization of agricultural wastes are realized.

This application relates to the field of building engineering technology, specifically disclosing a reinforced concrete and a reinforced steel composite concrete pile. The reinforced concrete comprises the following raw material components by weight: 346-356 parts cement, 180-200 parts mineral admixtures, 890-910 parts coarse aggregate, 821-841 parts fine aggregate, 5-25 parts shrinkage-reducing fibers, 30-45 parts expansion agent, 5.26-5.56 parts water-reducing agent, and 163-167 parts water. The addition of shrinkage-reducing fibers and expansion agent can alleviate the shrinkage of concrete when silica fume and rice husk ash are added, thereby obtaining reinforced concrete with excellent compressive strength and shrinkage resistance, which can better meet the requirements of high-rise buildings, bridges, tunnels, and other engineering projects for the shrinkage resistance and compressive strength of pile foundation structures.

The present invention provides a rice husk conveying device and method that eliminates collisions between rice husks and the wind turbine or casing within the blower, thereby preventing wear and tear on the wind turbine and casing. [Solution] The rice husk transport case 10 is provided with an air outlet 15, a rice husk inlet 9, and a rice husk outlet 16 located opposite the air outlet 15. The air blower 1 is used to create a high-pressure environment inside the rice husk transport case 10 by supplying air to it. A rice husk suction pipe 12 is provided on the side, which has a rice husk suction port 12a for sucking in rice husks 11 and connects the air outlet 15 and the rice husk outlet 16. The rice husks 11 that are brought into the rice husk transport case 10 are sucked in by the rice husk suction pipe 12 and discharged from the rice husk outlet 16. In this case, by attaching a pair of inclined plates 13A and 13B to the rice husk suction pipe 12, the rice husks 11 can be efficiently collected in the rice husk suction pipe 12, improving the conveying capacity.

This utility model proposes a quantitative feeding device for rice husk ash in the preparation of rice husk ash concrete, comprising: a feeding hopper and a quantitative feeding assembly. A discharge pipe is fixedly connected to the bottom of the feeding hopper. The quantitative feeding assembly is disposed inside the discharge pipe. The quantitative feeding assembly includes a guide hopper fixedly installed inside the discharge pipe, a feeding wheel rotatably installed inside the guide hopper, and a first driving component for driving the feeding wheel to rotate. Two symmetrically distributed material troughs are formed on the outer circumference of the feeding wheel. Guide ports adapted to the material troughs are formed on both the upper and lower sides of the guide hopper. An adjustment mechanism for adjusting the volume of the material troughs is provided inside the feeding wheel. This utility model, by setting a quantitative feeding assembly, can realize the quantitative feeding of rice husk ash, simplifying the feeding process and improving feeding efficiency.

The invention belongs to the field of building materials, and discloses a glass fiber gypsum board and a preparation method thereof.The glass fiber gypsum board comprises a core base material layer, a composite reinforcement layer and a surface protection layer which are sequentially arranged from inside to outside; the core base material layer is prepared from the following raw materials in parts by weight: 55-75 parts of building gypsum powder, 8-12 parts of rice hull ash, 3-6 parts of sisal fibers, 2-4 parts of nano calcium carbonate, 0.3-0.8 part of a PCA-R1 polycarboxylate superplasticizer and 25-35 parts of water; the composite reinforcing layer is of an interwoven structure of basalt fiber gridding cloth and a gypsum-silica sol composite adhesive, the aperture of the basalt fiber gridding cloth is 2-4 mm, and the monofilament tensile strength is larger than or equal to 4000 MPa; the surface protection layer is a gypsum-based nano-zinc oxide composite coating, and the thickness of the surface protection layer is 0.3-0.6 mm; the invention aims to overcome the defects of insufficient mechanical properties, low raw material utilization rate, backward preparation process and the like of the glass fiber gypsum board in the prior art, and provides the glass fiber gypsum board which is high in strength, good in toughness and excellent in environmental protection performance and the preparation method of the glass fiber gypsum board.

The invention relates to application of a dazomet liquid preparation in soil treatment in the field of pesticides. The liquid preparation can be used for preventing and treating true and bacterial diseases, nematodes and weeds of crops, and has a remarkable synergistic effect on soil-borne bacteria, fungal diseases, root-knot nematodes and field weeds. The pesticide application mode can be selected from one or more of drip irrigation, flushing application, mist spraying and soil layer treatment, and the pesticide can be directly used or used after being diluted for multiple times during pesticide application. Besides, the core advantage of the application is that the application limitation of the traditional dazomet preparation is broken through, and the dazomet preparation is suitable for wide regions, especially suitable for low-temperature regions and environments with the soil temperature being lower than 10 DEG C, and is especially preferably applied to rice seedling raising fields in low-temperature regions; multiple operation modes such as soil mixing, pulping and rice hull mixing can be adopted in a low-temperature scene, the operation is convenient and fast, the actual field requirements are met, and the environmental adaptability and the application flexibility of the dazomet preparation are remarkably improved.

The utility model discloses a rice screening machine. The rice screening machine comprises a machine frame, a stock bin, a vibrating screen, a separation barrel, a dust collection barrel, a dust collection connector and a belt type conveying mechanism. A feed port is formed above the stock bin, and a discharge port is formed below the stock bin; the separation barrel arranged in the stock bin enables the rice to collide with attached impurities in the continuous rotating process, and preliminary separation is achieved; a dust collection barrel on one side of the separation barrel is linked with a dust collection joint, is connected with external dust collection equipment and is used for sucking light impurities such as rice husks and dust; after dust collection treatment, the rice is continuously conveyed to the vibrating screen through the belt type conveying mechanism for secondary screening, and residual impurities and broken rice are further removed. The device is simple in structure, efficient in operation and capable of remarkably improving the purity and the grain integrity of rice raw materials and meeting the requirements of high-quality production processes such as biopharmacy and the like.