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53results about How to "Many holes" patented technology
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Calcination-free zeolite filter material activated by hydrochloric acid and preparation method thereof
A calcination-free zeolite filter material activated by hydrochloric acid is obtained by taking natural zeolite cleaned and activated by hydrochloric acid, binders and pore-forming agents as raw materials, evenly mixing the raw materials based on certain proportion and sprinkling water on the raw materials to form balls, and maintaining proper temperature, humidity and curing time in the process of curing. The prepared calcination-free zeolite filter material activated by the hydrochloric acid is coarse in surface and porous, is beneficial for apposition growth of microorganisms in biological filters, has fine adsorbability and regenerability and has excellent effect on sewage disposal when being used as fillers in biological aerated filters. The calcination-free zeolite filter material activated by hydrochloric acid and a preparation method thereof dispense with sintering process, consume no coal, electricity and other energy, and correspond with the current national environmental protection policy, namely energy-saving and emission-reduction.
Owner:UNIV OF JINAN
Tunnel advance geology forecast method based on blast hole drilling information
ActiveCN103308946AImprove efficiencyLow costSeismic signal processingSeismology for water-loggingSlagWater color
The invention discloses a tunnel advance geology forecast method based on blast hole drilling information. The method comprises the following steps of A, establishing a standard database [Ki] of drillability indexes before the implementation of forecast; and B, implementing advance geology forecast by the following specific steps of: (1) numbering advance blast holes on a tunnel face; (2) recording acquired drilling rate v, drilling pressure p, drilling rod rotating speed w, rock slag, return water amount and return water color one by one; (3) calculating the drillability index K of each group of parameters according to a drillability index formula (7); (4) comparing the calculated drillability index k with [Ki], if K belongs to (min[Ki], max[Ki]), the basic surrounding rock grade of a drilling segment is grade i; (5) comprehensively judging the surrounding rock grade in combination with rock slag ingredients, water return condition and the surrounding rock condition of the tunnel face according to a table 2; (6) comparing and verifying in combination with a forecasted surrounding rock grade and a practical surrounding rock grade determined after tunnel excavation; and (7) expanding corrected data into [Ki]. The method is convenient to operate, is low in cost, is accurate and efficient, and can be used for performing real-time advance geology forecast.
Owner:INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
Cultivating device
Owner:DEERE & CO
FeMnNi powder accelerant with low cost and preparation method and application
InactiveCN103170347ALow costMany holesDiamondMetal/metal-oxides/metal-hydroxide catalystsNitrogenGraphite
The invention relates to a FeMnNi powder accelerant with low cost, wherein the alloy comprises the components in percentage by weight as follows: 30-50% of Mn, 0-10% of Ni, 1-3% of Cr, 0.1-0.8% of C, 0.05-0.2% of Si and the balance of Fe. The oxygen content of a powder accelerant product optimized is less than or equal to 300ppm, and the nitrogen content is less than or equal to 180ppm. The accelerant is prepared by a gas atomization process of inertial gas, so that the accelerant powder is spherical or approximately spherical with uniform alloy composition. Diamond synthesized by the accelerant and graphite in proportion is greyish-green or dark green in color, and the crystal form of the diamond is a polygonal aggregate in a granular structure. The per mixed unit yield reaches over 154 carat / block by cavity with diameter of 40mm, the static pressure strength is average about 20N, and the coarsness proportion of 80 / 100 reaches over 60%, so that the accelerant is an ideal raw material for manufacturing an efficient diamond grinding apparatus for crisp and hard materials.
Owner:GRIMAT ENG INST CO LTD
Cultivator for aerating a ground surface
A cultivator for aerating a ground surface. The cultivator has a support frame moveable relative to the ground surface and a follower first pivotally connected to the support frame by a first pair of spaced link arms. The link arms have two pairs of equidistantly spaced pivot points for linear movement of the follower in a first direction away from the support frame. A tool support member is pivotally connected to the follower by a second pair of spaced link arms. The second link arms have two pairs of equidistantly spaced pivot points for linear movement of a cultivating tool in a second direction substantially perpendicular to the first direction. A driver effects cyclic movement of the tool support member in the second direction and movement of the follower in said first direction at a substantially constant rate during at least a selected portion of the cyclic movement corresponding to ground engagement of the cultivating tool.
Owner:DEERE & CO
Cultivating device
Owner:DEERE & CO
Modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and preparation method thereof
ActiveCN109603881ALarge specific surface areaMany holesPhysical/chemical process catalystsWater/sewage treatment by irradiationAbsorption capacityModified carbon
The invention discloses a modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and a preparation method thereof. The photocatalyst takes hollow tubular carbon nitride as a carrier and is loaded with modified carbon quantum dots; urea and melamine with a mole ratio of 1-5:1 are used to prepare the hollow tubular carbon nitride through hydrothermal and calcination. The preparation method comprises the following steps of: mixing hollow tubular carbon nitride, water and modified carbon quantum dot solution, and drying to obtain the photocatalyst. The photocatalyst has the advantages of large specific surface area, large number of pores, multiple active sites, high speed of separation and migration of photo-generated carriers, strong light absorption capacity, high photocatalytic activity, high stability, high photocatalytic efficiency and the like; the preparation method of the photocatalyst has the advantages of convenience in synthesis, simplicity in operation,no secondary pollution to the environment and the like. The photocatalyst can be widely used for treating organic pollutants in the environment and killing harmful microorganisms in the environment,and has good application value and application prospect.
Owner:HUNAN UNIV
Olecroanon locking proximal humerus plate
The invention discloses an olecroanon locking proximal humerus plate, which is an integrated plate with a head part and a body part, wherein the head part comprises a face part and a vertex part, and the face part and the vertex part are bended into an angle of 104-115 degrees; the head part is provided with a group of locking holes; the body part is provided with a group of locking holes and pressurizing holes; an angle of inclination of the lower section and the upper section of the body part is 5-9 degrees; the vertex part of the head part is provided with a first locking hole and a second locking hole; a nape is arranged between the first locking hole and the second locking hole; the face part of the head part is provided with a group of thread locking holes and a group of small holes for temporary fixing; and the tail end of the body part is provided with 1-3 holes for temporary fixing. The locking plate can treat olecranal fracture and at the same time complicate fracture shaft ulna, has good olecroanon attach performance with human body, no need of shaping during clinical practice, is convenient for operation, has good stability, and can improve the treatment effect.
Owner:北京理贝尔生物工程研究所有限公司
Cultivator for aerating a ground surface
A cultivator for aerating a ground surface. The cultivator has a support frame moveable relative to the ground surface and a follower first pivotally connected to the support frame by a first pair of spaced link arms. The link arms have two pairs of equidistantly spaced pivot points for linear movement of the follower in a first direction away from the support frame. A tool support member is pivotally connected to the follower by a second pair of spaced link arms. The second link arms have two pairs of equidistantly spaced pivot points for linear movement of a cultivating tool in a second direction substantially perpendicular to the first direction. A driver effects cyclic movement of the tool support member in said second direction and movement of the follower in said first direction at a substantially constant rate during at least a selected portion of the cyclic movement corresponding to ground engagement of the cultivating tool.
Owner:DEERE & CO
Porous superfine denier polyester pre-oriented yarn and preparation method thereof
InactiveCN103114344AMany holesSmall fineness of monofilamentFilament/thread formingMonocomponent polyesters artificial filamentFiberYarn
The invention relates to a porous superfine denier polyester pre-oriented yarn and a preparation method of the porous superfine denier polyester pre-oriented yarn. Terephthalic acid and ethylene glycol are adopted to be used as raw materials of polyester, and the existing production equipment of pre-oriented yarn (POY) is adopted. The main technological parameter of the porous superfine denier polyester pre-oriented yarn is: the diameter of spinneret plate microporous is 0.10-0.15 millimeter, the height of a slow cooling area is 80-150 millimeters, and the slow cooling area is combined with ring windchill; two nozzle oiling systems and reasonable winding tension and speed are adopted, the porous superfine denier polyester pre-oriented yarn which is 44-55 dtex / 192f is obtained, and the filament number of the porous superfine denier polyester pre-oriented yarn is 0.23-0.29 dtex. The porous superfine denier polyester pre-oriented yarn has the advantages of being plural in pore number, small in filament number, low in absolute intensity, small in bending rigidity, large in specific surface area and voidage, soft, light in weight and the like. Moreover, the porous superfine denier polyester pre-oriented yarn further has the advantages that filament aggregation has a good capillary core absorption effect and a better ventilation wet guiding function, added value is high, quality is good, production cost is low, the advantage of cost performance is obvious and application prospect is broad.
Owner:ZHONGRUN SCI & TECH
Zero-dimensional black phosphorus quantum dot/one-dimensional tubular carbon nitride composite photocatalyst and preparation method thereof
ActiveCN110841670ALarge specific surface areaGood optical performancePhysical/chemical process catalystsWater/sewage treatment by irradiationCarbon nitrideQuantum dot
The invention discloses a zero-dimensional black phosphorus quantum dot / one-dimensional tubular carbon nitride composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: mixing one-dimensional tubular carbon nitride with a zero-dimensional black phosphorus quantum dot solution, and performing vacuum drying to obtain the zero-dimensional black phosphorus quantum dot / one-dimensional tubular carbon nitride composite photocatalyst. The composite photocatalyst disclosed by the invention has the advantages of strong light absorption capability, strong photo-generated carrier separation and migration capability, high photocatalytic activity, good stability and the like, can be widely used for catalytic reduction of heavy metal pollutants and degradation of organic pollutants, can effectively remove heavy metal pollutants and organic pollutants from mediums, and has very high use value and a promising application prospect. The preparation method disclosed by the invention has the advantages of simple process, convenience in operation, low cost, no secondary pollution to the environment and the like, is suitable for large-scale preparation and is beneficial to industrial application.
Owner:HUNAN UNIV
Baking-free type porous composite zeolite filter material and preparation method thereof
InactiveCN101497021AMany holesBig holeOther chemical processesAluminium silicatesBiological filterCoal
The invention provides a burning free type porous compound zeolite filter material. Natural zeolite activated at a high temperature, a bonding agent and a pore forming agent are used as raw materials, and evenly mixed according to a certain ratio, and sprayed with water to form a sphere, during curing, proper temperature, humidity and curing time are kept, and then the burning free type porous compound zeolite filter material is obtained. The surface of the burning free type porous compound zeolite filter material is rough and porous, thereby facilitating the attached growth of microbes in a biological filter, and the filter material has excellent adsorptivity and regenerability, and when being used as a filling material in an aeration biological filter to treat sewage, the filter material can achieve extremely good treating effect. The burning free type porous compound zeolite filter material and the method for preparing the same provided by the invention have the advantages of unnecessary sintering process and no consumption of energy such as coal, electricity and the like, and meet the present national policy on environmental protection of saving energy and reducing emission.
Owner:UNIV OF JINAN
Method for making small-bore intravascular stent through supercritical gas
The invention provides a method for making a small-bore intravascular stent through supercritical gas. The method comprises a filling limiting stage, an intermittent foaming stage and a post-processing stage, wherein the filling limiting stage comprises the following operations: placing a to-be-processed tubular material into an outer mould which has a limiting effect, and filling and compacting aspace between the tubular material and the outer mould by solid particles I; filling and compacting a cavity in the middle of the tubular material by solid particles II, or adding an inner mould which has a limiting effect in the cavity, and filling and compacting a space between the tubular material and the inner mould by the solid particles II; the intermittent foaming stage includes a polymergas saturating stage and a rapid depressurizing cooling stage, wherein supercritical carbon dioxide is taken as a foaming agent; and the post-processing stage comprises an operation of separating thefoamed tubular material from the mould, so that the intravascular stent is obtained. Different from other means, the stent provided by the invention is designed with many uniform pores in the surface;and in addition, problems of post-processing can be also solved.
Owner:ZHENGZHOU UNIV
Nitride semiconductor structure and semiconductor light emitting device including the same
ActiveUS20140138619A1Enhance rate of recombinationImproved light emissionSemiconductor devicesDopantSemiconductor package
A nitride semiconductor structure and a semiconductor light emitting device are revealed. The semiconductor light emitting device includes a substrate disposed with a first type doped semiconductor layer and a second type doped semiconductor layer. A light emitting layer is disposed between the first type doped semiconductor layer and the second type doped semiconductor layer. The second type doped semiconductor layer is doped with a second type dopant at a concentration larger than 5×1019 cm−3 while a thickness of the second type doped semiconductor layer is smaller than 30 nm. Thereby the semiconductor light emitting device provides a better light emitting efficiency.
Owner:GENESIS PHOTONICS
Small-aperture corrugated catalyst for fuel gas denitration, and preparation method thereof
InactiveCN110876942AImprove thermal stabilityNo crystal changeDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystIron salts
The invention belongs to the technical field of flue gas denitration, and relates to a small-aperture corrugated catalyst for gas denitration, and a preparation method thereof. The catalyst adopts a glass fiber mat as a skeleton base material, one or two of titanyl sulfate and silicon oxide as a carrier, one or two of ammonium heptamolybdate and cerium salt as an assistant and one or more of a manganese salt, an iron salt and a chromium salt as an active component precursor and deionized water; and the catalyst comprises, by weight, 90 parts of the carrier, 1.6-6.5 parts of an active componentprecursor, 3.8-5.1 parts of the assistant and 120-200 parts of deionized water. The catalyst adopts the titanyl sulfate and silicon oxide as the carrier, so that the catalyst is ensured to have goodthermal stability at a high temperature, and crystal form change and sintering are avoided; the manganese salt, the iron salt and the chromium salt are used as active components, so hole blockage caused by high solution viscosity can be avoided; and the ammonium heptamolybdate and the cerium salt are used as modification aids, so that the catalyst has an extremely high catalytic performance in anSCR reaction.
Owner:QIYUAN XIAN DAE YOUNG ENVIRONMENTAL PROTECTION TECH CO LTD
Nitride semiconductor structure and semiconductor light emitting device including the same
ActiveUS9147800B2Improve efficiencyImprove luminous efficiencySemiconductor devicesDopantLight emitting device
A nitride semiconductor structure and a semiconductor light emitting device are revealed. The semiconductor light emitting device includes a substrate disposed with a first type doped semiconductor layer and a second type doped semiconductor layer. A light emitting layer is disposed between the first type doped semiconductor layer and the second type doped semiconductor layer. The second type doped semiconductor layer is doped with a second type dopant at a concentration larger than 5×1019 cm−3 while a thickness of the second type doped semiconductor layer is smaller than 30 nm. Thereby the semiconductor light emitting device provides a better light emitting efficiency.
Owner:GENESIS PHOTONICS
Drafting method for preparation of mesophase pitch fiber precursor
InactiveCN108265337AReduce frequencyReduce the number of timesSpinnerette packsStretch-spinning methodsFiberMetallurgy
The invention discloses a drafting method for preparation of a mesophase pitch fiber precursor. Mesophase pitch is extruded by a spinneret plate in a spinning assembly, a certain length of retarded cooling area is arranged behind the spinneret plate, finally, drafting is performed under the joint action of gravity and a drafting roll, and the mesophase pitch fiber precursor is formed. Drafting isperformed by use of gravity and tension applied by the drafting roll, the frequency of turning of the precursor is reduced, so that precursor breaking and damage in the spinning process are effectively reduced, and precursor damage is prevented through a spinning channel. The drafting method is applicable to continuous drafting of precursors in the continuous spinning process of mesophase pitch fiber, the mesophase pitch fiber precursor with a small diameter can be obtained, and the obtained precursor has higher strength.
Owner:西安天运新材料科技有限公司
Novel micro-channel flat pipe machined by roll-bending brazing process
The invention provides a novel micro-channel flat pipe machined by a roll-bending brazing process. The micro-channel flat pipe is formed from a composite plate by means of a plurality of times of bending formation by using the roll-bending brazing process; a plurality of micro-channels extending linearly along the longitudinal direction are arranged in sequence on the micro-channel flat pipe and in the width direction of the micro-channel flat pipe. The composite plate is an aluminum alloy cascaded layer which is a composite structure comprising three layers or more than three layers, wherein the aluminum alloy cascaded layer sequentially comprises a brazing material layer, an anticorrosive layer and a base layer. According to the novel micro-channel flat pipe provided by the invention, the hole type of the micro-channels is improved and is transformed from a Chinese character Ji-shaped hole into a wave-shaped hole; after the hole type is transformed into the wave-shaped hole, a micro-channel flat pipe with 14 to 22 holes can be obtained under the same outline dimension.
Owner:SHANGHAI JIAO TONG UNIV
Production process of metal oxide supported boron-silicon-containing phenolic resin-based active carbon tail gas desulfurizer for producing hydrogen fluoride
ActiveCN108031252AImprove desulfurization efficiencyMany holesGas treatmentOther chemical processesChemistryActive carbon
The invention discloses a production process of a metal oxide supported boron-silicon-containing phenolic resin-based active carbon tail gas desulfurizer for producing hydrogen fluoride. The production process comprises the following steps: firstly introducing boron and silicon atoms into a phenolic resin framework for effectively improving the heat resistance and oxidation resistance of the phenolic resin, then carrying out carbonization to obtain boron-silicon-containing phenolic resin carbon, and then activating the boron-silicon-containing phenolic resin carbon to finally obtain the metaloxide supported boron-silicon-containing phenolic resin-based active carbon tail gas desulfurizer. The production process provided by the invention has the following beneficial effects that (1) the desulfurization efficiency is high; (2) the number of holes in the desulfurizer is large; and (3) the desulfurizer can be recycled and reused.
Owner:QUZHOU NANGAOFENG CHEM CO LTD
Autoclaved aerated concrete containing coal gangue and iron tailings and preparation method of autoclaved aerated concrete
The invention belongs to the technical field of building wall materials, and particularly relates to autoclaved aerated concrete containing coal gangue and iron tailings and a preparation method of the autoclaved aerated concrete. The autoclaved aerated concrete containing the coal gangue and the iron tailings is prepared from the following raw materials in parts by weight: 5 to 30 parts of the coal gangue, 15 to 25 parts of aluminum slag, 30 to 55 parts of the iron tailings, 5 to 15 parts of nanoscale silicon dioxide, 5 to 15 parts of metakaolin, 10 to 15 parts of quick lime, 0 to 5 parts of cement and the balance of waste materials. Auxiliary materials include aluminum powder, a foam stabilizer and a water reducing agent. In the raw materials, the iron tailings and the coal gangue are used as siliceous materials, so that the environmental problem caused by solid waste stockpiling can be solved, waste is turned into wealth, and meanwhile, a good effect is achieved on the sustainable development of the society. The prepared concrete block has good physical and mechanical properties and durability, the product performance meets the national standard requirement, and 04-grade, 05-grade, 06-grade and 07-grade concrete blocks can be produced according to different proportions and process systems.
Owner:SHENYANG POLYTECHNIC UNIV
FeMnNi powder accelerant with low cost and preparation method and application
InactiveCN103170347BLow costMany holesDiamondMetal/metal-oxides/metal-hydroxide catalystsNitrogenGraphite
The invention relates to a FeMnNi powder accelerant with low cost, wherein the alloy comprises the components in percentage by weight as follows: 30-50% of Mn, 0-10% of Ni, 1-3% of Cr, 0.1-0.8% of C, 0.05-0.2% of Si and the balance of Fe. The oxygen content of a powder accelerant product optimized is less than or equal to 300ppm, and the nitrogen content is less than or equal to 180ppm. The accelerant is prepared by a gas atomization process of inertial gas, so that the accelerant powder is spherical or approximately spherical with uniform alloy composition. Diamond synthesized by the accelerant and graphite in proportion is greyish-green or dark green in color, and the crystal form of the diamond is a polygonal aggregate in a granular structure. The per mixed unit yield reaches over 154 carat / block by cavity with diameter of 40mm, the static pressure strength is average about 20N, and the coarsness proportion of 80 / 100 reaches over 60%, so that the accelerant is an ideal raw material for manufacturing an efficient diamond grinding apparatus for crisp and hard materials.
Owner:GRIMAT ENG INST CO LTD
Porous filtration film
InactiveCN104174301AMany holesFine pore sizeSemi-permeable membranesVinyl acetateArray data structure
The invention discloses a porous filtration film. The porous filtration film comprises the following raw materials in parts by weight: 20-40 parts of polyvinyl chloride, 15-30 parts of vinyl acetate, 5-10 parts of porous fibers, 10-30 parts of an organic solvent, 1-5 parts of a heat stabilizer and 1-3 parts of a surfactant. A preparation method of the porous filtration film comprises the following steps: adding the polyvinyl chloride, the vinyl acetate and the porous fibers into the organic solvent according to the parts by weight, simultaneously and uniformly mixing, stirring, adding the heat stabilizer and the surfactant, continuously stirring so as to obtain a spraying film slurry solution, and coagulating the spraying film to obtain a finished product. The preparation method of the porous filtration film is simple in process and convenient to operate; and the prepared porous filtration film is small in aperture, large in number and high in filtration efficiency.
Owner:SUQIAN RONGJIN INFORMATION TECH
Rotary cutter drum and a rotary cutter unit with such a rotary cutter drum
InactiveUS20060070505A1Less machiningEasy and fast mannerShearing machinesMetal working apparatusEngineeringMechanical engineering
A rotary cutter drum includes a cutter portion formed of a multiphase material and includes first and second substantially cylindrical, radially outwardly exposed surfaces, and a knife member formed of one piece with the exposed surfaces and arranged to axially separate the first and second surfaces from one another. The knife member protrudes by a distance in the range of 1 to 5 mm radially outwardly beyond a smallest diameter portion of the first and second exposed surfaces. The knife member includes two sides terminating at respective ones of the first and second exposed surfaces.
Owner:SANDVIK INTELLECTUAL PROPERTY AB
Hollow tubular carbon nitride photocatalyst and its preparation method and application
ActiveCN109603880BLarge specific surface areaMany holesPhysical/chemical process catalystsWater/sewage treatment by irradiationCarbon nitrideEngineering
The invention discloses a hollow tubular carbon nitride photocatalyst and its preparation method and application. The hollow tubular carbon nitride photocatalyst is prepared by using urea and melamine as raw materials through hydrothermal heating and calcination. The molar ratio of urea and melamine is The ratio is 1 to 5:1. The hollow tubular carbon nitride photocatalyst of the present invention has the advantages of large specific surface area, large number of holes, fast separation and migration rate of photogenerated carriers, strong light absorption ability, and high photocatalytic activity. It is a novel morphology structure and excellent photocatalytic performance. The preparation method of the new visible light catalyst has the advantages of simple process, easy operation, low cost, and no secondary pollution. It is suitable for large-scale preparation and is conducive to industrial application. The photocatalyst of the present invention can degrade organic pollutants, can achieve efficient removal of organic pollutants, has the advantages of simple process, convenient operation, low cost, high treatment efficiency, good removal effect, etc., and has good application value and application prospects.
Owner:HUNAN UNIV
Manufacturing method of porous tasty bean curd based on microwave pretreatment
ActiveCN108576242AWell distributed holesMany holesCheese manufactureFood scienceThermal insulationFlavor
The invention provides a manufacturing method of porous tasty bean curd based on microwave pretreatment, comprising the following steps: (1) washing fresh soybeans and draining, adding distilled waterwhich is 6 times the weight of the soybeans, carrying out microwave treatment at the power of 200 W in a microwave oven for 3 min, taking the materials out of the microwave oven and cooling to room temperature to obtain pretreated soybeans; (2) immersing the pretreated soybeans in water until there is a planar concave in the center of the bean cotyledon, and taking out to obtain waterishlogged soybeans; (3) adding water to the waterishlogged soybeans and jordaning to obtain uncooked soya-bean milk, boiling the uncooked soya-bean milk for 1-3 min to obtain cooked soya-bean milk, immediately adding water and cooling to 63-67 DEG C within 10-15 seconds so as to obtain a serous fluid; (4) adding a coagulating agent into the serous fluid, carrying out thermal insulation for 10 min, and takingout to obtain bean curd pulp, and discharging water from the bean curd pulp through a flip self-pressing mode to obtain a semi-finished product; and (5) adding the semi-finished product into boiled cooking liquor and waiting for 3-5 min to obtain the porous tasty bean curd. The prepared bean curd has uniform aperture, good local flavor, and excellent yield and elasticity.
Owner:SUZHOU JINJI FOODS
The Method of Reducing the Strain of the Surrounding Rock of the Roadway Inside the Slope
ActiveCN109595033BReduce lateral displacementNot easy to passMining devicesDirectional drillingRock coreClassical mechanics
The invention discloses a method for reducing strain of roadway surrounding rock in a slope. The method comprises the following steps: drilling holes in the inner side, the upper part and the bottom of a roadway slope, calculating and confirming depths and distances of the holes by using finite element software or experience equations, and carrying out rotary drilling to take out a rock core. In the slope deformation process, rock is deformed because of extrusion of stress, the strain is transversely developed because of hole drilling, and longitudinal stress conducted to a roadway lining canbe eliminated or reduced, so that the purpose of reducing roadway deformation can be achieved. By drilling holes by using a drilling machine and taking rock cores, elastic deformation of the roadway surrounding rock can be increased, lining pressure can be reduced, and roadway necking can be reduced.
Owner:ANSTEEL GRP MINING CO LTD
A method for treating heavy metals and organic pollutants using zero-dimensional black phosphorus quantum dots/one-dimensional tubular carbon nitride composite photocatalyst
ActiveCN110841669BEffective recoveryQuick restorePhysical/chemical process catalystsWater/sewage treatment by irradiationCarbon nitrideBlack phosphorus
The invention discloses a method for treating heavy metals and organic pollutants by using a zero-dimensional black phosphorus quantum dot / one-dimensional tubular carbon nitride composite photocatalyst. The method uses a zero-dimensional black phosphorus quantum dot / one-dimensional tubular carbon nitride composite photocatalyst. The catalyst treats heavy metals and organic pollutants. The zero-dimensional black phosphorus quantum dot / one-dimensional tubular carbon nitride composite photocatalyst includes one-dimensional tubular carbon nitride, and the one-dimensional tubular carbon nitride is decorated with zero-dimensional black phosphorus quantum dots. . The method of the present invention can achieve effective removal of heavy metals and organic pollutants by using zero-dimensional black phosphorus quantum dots / one-dimensional tubular carbon nitride composite photocatalyst to treat heavy metals and organic pollutants, and has the advantages of simple process and convenient operation. , has the advantages of low equipment requirements, low cost, high treatment efficiency, good removal effect, and no secondary pollution. It has high use value and good application prospects.
Owner:HUNAN UNIV
Anti-backflow perforated aerator
ActiveCN113072174AImprove oxygen transfer rateEasy to carry outWater aerationBiological treatment apparatusOxygen supplyMechanical engineering
The invention relates to the technical field of environmental protection equipment, and discloses an anti-backflow perforated aerator, which comprises an air inlet pipe, a clamping device, an oxygen supply aeration diaphragm, an anti-backflow rubber diaphragm, a locking ring and a pressing cover, wherein the oxygen supply aeration diaphragm is in a circular ring shape, oxygen supply aeration holes are formed in the ring surface of the oxygen supply aeration diaphragm at equal intervals, a boss is arranged at the bottom of the air inlet pipe, the inner ring of the oxygen supply aeration diaphragm is clamped between the clamping device and the boss, the anti-backflow rubber diaphragm is arranged below the oxygen supply aeration diaphragm and is provided with a groove matched with the boss, and the outer ring of the oxygen supply aeration diaphragm and the outer ring of the anti-backflow rubber diaphragm abut against each other and are fixedly clamped between the locking ring and the pressing cover. According to the invention, the oxygen supply function and the stirring function can work independently and can also work cooperatively, and the oxygen supply power efficiency and stability are greatly improved.
Owner:镇江伊博特环保科技有限公司
A production process of a metal oxide-loaded borosilicate phenolic resin-based activated carbon tail gas desulfurizer for the production of hydrogen fluoride
ActiveCN108031252BMany holesImprove desulfurization efficiencyGas treatmentOther chemical processesHydrogen fluorideActivated carbon
The invention discloses a production process of a metal oxide supported boron-silicon-containing phenolic resin-based active carbon tail gas desulfurizer for producing hydrogen fluoride. The production process comprises the following steps: firstly introducing boron and silicon atoms into a phenolic resin framework for effectively improving the heat resistance and oxidation resistance of the phenolic resin, then carrying out carbonization to obtain boron-silicon-containing phenolic resin carbon, and then activating the boron-silicon-containing phenolic resin carbon to finally obtain the metaloxide supported boron-silicon-containing phenolic resin-based active carbon tail gas desulfurizer. The production process provided by the invention has the following beneficial effects that (1) the desulfurization efficiency is high; (2) the number of holes in the desulfurizer is large; and (3) the desulfurizer can be recycled and reused.
Owner:QUZHOU NANGAOFENG CHEM CO LTD
Method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dots to support hollow tubular carbon nitride photocatalyst
ActiveCN109603882BEfficient degradationSimple processPhysical/chemical process catalystsWater/sewage treatment by irradiationModified carbonCarbon nitride
The invention discloses a method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dots to load a hollow tubular carbon nitride photocatalyst. The method includes the following steps: loading the modified carbon quantum dots with a hollow tubular carbon nitride photocatalyst. Mix it with organic pollutant wastewater or bacterial solution for photocatalytic treatment to complete the treatment of organic pollutants or bacteria. The modified carbon quantum dot-loaded hollow tubular carbon nitride photocatalyst uses hollow tubular carbon nitride as a carrier, on which Loaded with modified carbon quantum dots, the hollow tubular carbon nitride is prepared by hydrothermal treatment and calcination using urea and melamine with a molar ratio of 1 to 5:1 as raw materials. The method for treating organic pollutants and photocatalytic sterilization of the present invention has the advantages of simple process, convenient operation, simple equipment, low cost, high processing efficiency / high photocatalytic efficiency, good removal effect / good sterilization effect, clean and pollution-free, etc., and has high application value and commercial value.
Owner:HUNAN UNIV
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