336 results about "Rice hulls" patented technology

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 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 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 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 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 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.

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.

The invention discloses a lotus seed wine brewing method, and belongs to the technical field of wine brewing, selenium-rich lotus seeds without lotus cores are used as a main material, the lotus cores are collected, bitter root sources are eliminated through warm water debitterizing and enzymolysis degradation, the lotus cores and rice husks are compounded and incorporated into an auxiliary material system, the rice husks adsorb residual bitter taste, selenium and flavone of the lotus cores are synchronously reserved, and the lotus seed wine is obtained. Waste utilization of the lotus seeds is facilitated, and beneficial components of the lotus seed wine are improved; in the cleaning link, normal-temperature sterile water containing food-grade oligosaccharide is adopted for low-pressure spraying, the oligosaccharide forms a protective film on the surfaces of the lotus seeds, and selenium dissolution is reduced; a low-pressure low-temperature short-time process is adopted in the cooking link, so that organic selenium and flavone are prevented from being damaged by high temperature; low-temperature sectional interception is adopted for distillation, selenium is prevented from being volatilized along with high-temperature water vapor, and active ingredients are intensively intercepted in a core wine section. According to the invention, the value of the raw materials is maximized, active ingredients are efficiently reserved, the production efficiency and the quality stability are improved, and finally, the wine has drinking experience and health-care properties of lotus seeds.

The invention relates to the technical field of green fuels, in particular to a green fuel based on agriculture and forestry residues and a preparation method thereof.The green fuel comprises an agriculture and forestry residue-based main material and multiple auxiliaries, the main material is a mixture of straw, shells and mushroom dregs, and the mixture is subjected to specific pretreatment; the auxiliary agents comprise a desulfurizing agent, a combustion improver, a binder and the like, specific types of the auxiliary agents are selected and are correspondingly prepared or modified, the rice hull based mesoporous adsorbent is prepared by activating rice hulls, and the fuel has good performance and environment-friendly characteristic. By optimizing the pretreatment process, the fiber structure of the raw material is destroyed; the auxiliaries cooperate to realize multiple functions; pollutants are purified in situ by the mesoporous adsorbent; the process optimization improves the fuel mixing uniformity, pore structure and mechanical strength, and is convenient for storage, transportation and large-scale application.

The invention discloses a method for preparing light ceramsite from high-silicon tailings, and belongs to the technical field of light building materials. The preparation method of the lightweight ceramsite comprises the following steps: (1) uniformly stirring and mixing the high-silicon tailings, the cyanidation tailings, the gasification slag and the metallurgical furnace ash, adding the rice husks and the modified reinforcing agent, and uniformly mixing to obtain a mixture; adding deionized water, and stirring into a mud pie shape; granulating by a disc granulator, and drying to obtain a green body; and (2) pre-calcining the green body in a weak oxygen atmosphere, and calcining in a reducing atmosphere to obtain the lightweight ceramsite. The lightweight ceramsite prepared by the invention has relatively high cylinder compressive strength and decyanation efficiency.

The invention discloses all-solid-waste low-carbon vegetation concrete and a preparation method thereof, and belongs to the technical field of building materials. The all-solid-waste low-carbon vegetation concrete is prepared from a solid waste cementing material, solid waste coarse aggregate, fibers, a water reducing agent and water, the solid waste cementing material is prepared from the following raw materials in parts by mass: 55 to 90 parts of slag powder, 5 to 20 parts of industrial byproduct gypsum, 5 to 12 parts of rice hull ash, 5 to 15 parts of magnesium slag powder and 1 to 3 parts of carbide slag. The all-solid-waste low-carbon vegetation concrete designed by the invention has the advantages of low alkalinity, good durability, high utilization rate of solid waste resources and the like, and is low in total energy consumption and carbon emission due to no addition of cement. In an acid environment, the stability of a hydration product ettringite generated by the gelling system is higher than that of calcium hydroxide, and an obtained solid waste-based gelling material hardened body is more compact, can prevent hydrogen ions in the environment from entering the solid waste-based gelling material hardened body and has excellent acid corrosion resistance.

The utility model belongs to the technical field of agricultural product detection equipment, and particularly relates to a rice husk moisture detection device which comprises a main body bracket, a control panel and an infrared moisture detector, the control panel is arranged at the side end of the main body bracket, and the infrared moisture detector is arranged at the upper end of the main body bracket. Through the arrangement of the lifting separation disc, the linkage frame, the telescopic rod, the vibrator and the flexible connecting frame, rice husks are scattered into the lifting separation disc, and the rice husks are scattered all around through the protruding circular truncated cone in the middle of the lifting separation disc. At the moment, the vibrator is started, the lifting separation disc vibrates at high frequency, the rice husks are evenly scattered through vibration, and part of the rice husks fall into circular holes formed in the lifting separation disc. And then an electric air cylinder is started, a linkage frame is jacked through a top push rod, and the linkage frame drives a telescopic rod to move upwards and drill out of a hole of the lifting separation disc till the rice hulls falling into the lifting separation disc are taken out. At the moment, the rice hulls are taken out by the six telescopic rods and located at the tops of the telescopic rods, and two to three rice hulls are reserved in the top space of each telescopic rod.

The utility model discloses a material screening device for carbonized rice husk processing, and belongs to the technical field of carbonized rice husk material screening. A material screening device for carbonized rice hull processing comprises a fixing base, springs and a vibration motor are arranged at the bottom of the fixing base, a material screening assembly is rotationally connected into a fixing box, a fan and a dust suction box are arranged at the top of the fixing box, and a dust collection box is arranged on the outer wall of the fixing box. The screening barrel is comprehensively cleaned, the situation that screening holes are blocked, and consequently later screening is affected is effectively reduced, dust generated in the screening process can be sucked through the dust suction pump and then transferred into the dust collection box through the dust suction pipe, dust pollution can be reduced to a greater extent, the collected dust can be compacted, and the screening efficiency is improved. And later transfer and storage are facilitated.

The utility model discloses a hulling device for rice processing, and relates to the technical field of rice hulling. The box comprises a box body. Unhulled rice is poured into the hulling device body to be hulled, so that a rice and rice hull mixture falls onto the surface of the separation roller, and then the first driving assembly is started to be matched with the rotating shaft to drive the separation roller to rotate to impact the rice and rice hull mixture; the air blowing assembly blows flying rice hulls into a rice hull pipe arranged on one side of the bottom end of the U-shaped frame in a communicating mode and is sprayed out, meanwhile, the separation roller drives a spiral conveying blade to push rice, and the rice falls into the top end of a flow dividing plate through the rice pipe; according to the rice hulling device, separation can be conducted in the rice hull and rice separation stage and in the rice fine screening process, the situation that rice hulls fall onto the screening assembly and block the screening assembly is avoided, the rice hulls and the rice hulls can be divided through the rice hull pipe and the rice pipe correspondingly, and therefore the practicability of the rice hulling device is improved.

The application provides a gas emission reduction functional agent for composting and a preparation method and application thereof, relates to the technical field of organic solid waste resource processing, and comprises pyrolysis treatment of biomass raw materials to form microporous biochar, wherein the pyrolysis treatment adopts limited oxygen pyrolysis conditions, the microporous biochar and the porous inorganic carrier form a multi-stage pore channel skeleton system, and the biomass raw materials include bamboo chips, rice husks and wood chips. The gas emission reduction functional agent for composting and the preparation method thereof are characterized in that the zeolite and bentonite are pretreated to form a porous inorganic carrier, the microporous biochar is combined with the carrier, the functional factor grading release particles are formed by compounding and coating treatment, and finally the composite integration treatment is performed, so that the gas emission reduction functional agent with a multi-stage pore channel skeleton system and a synergistic effect is successfully prepared, the efficiency of gas emission reduction in the composting process is improved, the components are ensured to be released as needed, and the emission reduction effect of the functional agent is enhanced.

The invention discloses low-shrinkage ultra-high performance concrete as well as a preparation method and application thereof, and belongs to the technical field of building materials. The low-shrinkage ultra-high performance concrete is prepared from the following raw materials in parts by weight: 500 to 600 parts of cement, 1000 to 1500 parts of magnesium-titanium slag sand, 150 to 200 parts of fly ash, 150 to 200 parts of silica fume, 100 to 150 parts of rice hull ash, 150 to 180 parts of steel fiber, 20 to 30 parts of a water reducing agent and 150 to 180 parts of water. The invention further discloses a preparation method and application of the low-shrinkage ultra-high performance concrete. The low-shrinkage ultra-high performance concrete prepared by the invention can better solve the problem of poor long-term durability of the concrete caused by high shrinkage characteristic of the existing ultra-high performance concrete.

The utility model provides a kind of tail gas recovery device in rice hull sorting process, including waste gas recovery storehouse, the waste gas recovery storehouse inner bottom is provided with the waste collection box of open upper surface, the gas filter storehouse is provided in the upper end of waste gas recovery storehouse, and the discharge outlet of the gas filter storehouse is correspondingly set with the waste collection box, the opening and closing member for opening and closing the discharge outlet of the gas filter storehouse is arranged in the left side lower end of waste gas recovery storehouse, the left side of waste gas recovery storehouse is connected with the feed pipe being communicated with the bottom of the gas filter storehouse, the left side upper end and the inner right side upper end in the gas filter storehouse are rotatably connected with filter plate by motor, and the lower surface of filter plate is provided with vibration motor;The utility model can improve filtering efficiency, reduce filter screen blockage, realize chip classification collection.

The invention discloses a method for preparing a sintered hollow batten from high-doping-amount graphite tailings, pretreated graphite tailings are used as a main raw material, coal gangue and functional auxiliaries are matched, the use amount of the graphite tailings is 40%-65%, the use amount of the coal gangue is 30%-50%, and the functional auxiliaries comprise mullite powder, rice hull ash and a polycarboxylic acid drag reducer. The preparation method comprises the following steps: burdening raw materials, adding water, mixing, aging, carrying out vacuum extrusion molding to obtain a green body, and sintering by a segmented drying and programmed roasting process to obtain a finished product. By optimizing the raw material ratio and process parameters, the problems of poor plasticity and difficult forming of high-doping-amount graphite tailings are solved, the prepared sintered hollow batten has the advantages of light weight, high strength and low water absorption rate, the compressive strength exceeds 10 MPa, the dry density is lower than 800 kg / m < 3 >, all performance indexes meet the standard requirements of light partition battens for buildings, and the sintered hollow batten is suitable for large-scale popularization and application. And an effective technical approach is provided for large-scale high-value utilization of the graphite tailings.

The invention discloses a water flowing structure which comprises a floating platform, an ecological filter screen arranged on the floating platform and a suction assembly arranged below the floating platform. The ecological filter screen is composed of a filter screen main body and a cleaning disc rotationally arranged on the bottom surface of the filter screen main body; a screen plate area and a solid plate area are distributed on the bottom surface of the filter screen main body in a staggered manner, and the cleaning disc is provided with bristles for cleaning the bottom surface of the filter screen main body; the suction assembly is composed of a plurality of suction pipes and a water pump connected with the suction pipes and used for sucking water. A driving ring is rotationally arranged on the floating platform located below the suction pipe, the driving ring and the cleaning disc are fixed through a plurality of connecting rods arranged at equal intervals, and a plurality of flow guide holes for rotation driving through water flow falling are formed in the driving ring. According to the invention, the water kinetic energy of the suction assembly is utilized to automatically clear the blockage of the ecological filter screen, so that the lower water conveyed by the suction pipe can effectively pass through a biological filter bed formed by straws, rice husks and the like and water purification plants or algae and then flow back to the water body, and the water activating effect is improved.