189results about How to "Quick recycling" patented technology

The invention discloses a method for recycling a metal oxide from a waste flue gas denitration catalyst, comprising the following steps of: crushing the waste flue gas denitration catalyst to carry out pre-roasting pretreatment at high temperature; adding Na2CO3 into the waste flue gas denitration catalyst according to the proportion, mixing, pulverizing and roasting at high temperature to obtain a sintering block; crushing the sintering block and putting the crushed sintering block into hot water, and stirring and lixiviating to obtain titanate; adding sulphuric acid into the titanate, filtering, water-washing and roasting to obtain TiO2; adding the sulphuric acid into the lixiviated filtering liquid to regulate a pH value to 8.0-9.0; adding excessive NH4Cl for vanadium precipitation; decomposing NH4VO3 obtained from filtering at high temperature to prepare a V2O5 product; adding hydrochloric acid into the filtering liquid subjected to the vanadium precipitation to regulate a pH value to 4.5-5.0; adding CaCl2 for molybdenum and tungsten precipitation; treating the CaM0O4 and CaWO4, obtained from filtering, with the hydrochloric acid and roasting to obtain MoO3 and WO3. The method of the invention has the advantages of simple process and apparatus, high recycling efficiency, good product technical data, large treatment capacity and the like.

The invention discloses a preparation method of a super-hydrophobic polyurethane sponge / iron oxide composite material used for oil-water separation and belongs to the field of composite materials. The preparation method comprises the following steps: carrying out ultrasonic washing on polyurethane sponge by dichloromethane and de-ionized water respectively to prepare a coarsening solution; coarsening the washed polyurethane sponge; preparing magnetic iron oxide particles from substances including ferric trichloride hexahydrate, glycol and the like through a magnetic separation method; adding 1-dodecanethiol into the magnetic iron oxide, adjusting the pH value and carrying out ultrasonic dispersion; adding tri-hydroxymethyl aminomethane into the dispersion solution, uniformly mixing and adding the polyurethane sponge; and stirring, washing and drying to obtain the super-hydrophobic polyurethane sponge / iron oxide composite material. According to the prepared iron oxide particles, a micro-nano structure is constructed on the surface of the sponge and low-surface-energy substances are introduced to prepare the composite material with super-hydrophobic and super-oleophylic properties, so that the composite material has the advantages of high oil absorption capability, selective separation of oil-water mixtures, rapid recycling of oil products and cyclic utilization of the material.

A integrated biomass thermocracking equipment for preparing liquid fuel is composed of cyclone separator, carbon filter, multi-stage condensing system consisting of two air coolers, two heat-transfer oil heaters and three condensers, self-heating system consisting of two air coolers, carbon burner and heat exchanger of reactor, combined feeder, and cross-section variable fluidized-bed reactor. Its advantages are flash temp-rasing of biomass, fast eduction out of volatile components and recovering solid carbon.

The invention discloses a miniature movable type agricultural and forest biomass fast pyrolysis device. The device comprises a traveling mechanism (25), a combustion furnace (18), a feeder (21), a fast pyrolysis reactor (22), a gas solid separator (23), a gas condenser (11), a non-condensable gas purifier (24), a fan (16), a gas buffer tank (17) and a gas preheater (19); the height of the fast pyrolysis reactor (22) can be adjusted, the device can be suitable for various agricultural and forest biomass raw materials, and the fluidization quality in the reactor is better due to the arrangementof an inverted-cone-shaped gas flow stabilizer in a top cover of the reactor; the non-condensable gas is taken as gas sources of spouting gas and fluidized gas and heat supply fuel, the entire deviceis simple in structure, small in volume and stable in running, can be hauled to the agricultural and forest biomass for production intensively and has lower production cost; the small-scale movable type operating mode also avoids the problem that the industrial enlargement of a fluid bed reactor is not easy; and the industrial production of agricultural and forest biomass fast pyrolysis is realized in a disguised form.

The invention discloses a casting molding template and a casting molding process for constructional columns of infilled walls. The molding template comprises a lining template and a principal template, wherein the upper end part of the principal template is provided with a lining template installing slot for installing the lining template, the lining template and the principal template are assembled so as to form a constructional column template; and the lining template installing slot is provided with a horn-type feeding device, the lining template is a movable template which can carry out up-and-down motions or left-and-right motions on the inner wall of the principal template, and a template moving component is arranged on the outside surface of the lining template; and the molding process comprises the steps of 1, carrying out survey layout; 2, installing a reinforcement cage; 3, erecting the template; 4, installing the horn-type feeding device; 5, moving the lining template outwards; 6, carrying out casting construction; 7, moving back the lining template and removing the horn-type feeding device; and 8, removing the template. The casting molding template disclosed by the invention is reasonable in structure, simple in operation, economic, practical, time-saving, labor-saving and good in application effect, and can effectively solve various actual problems existing in the current construction on constructional columns of infilled walls.

The invention discloses a bending-adjustable conveying system for an interventional cardiac valve. The system comprises an outer sheath tube, an core tube assembly which is arranged in the outer sheath tube and can relatively slide in the axial direction and an operation handle connected with the proximal ends of the outer sheath tube and the core tube assembly; a tube body of the outer sheath tube is provided with a distal end and the proximal end, the handle is connected with a traction wire for pulling the distal end of the tube body to bend, a distal end of the traction wire is connected with the tube body, the connection part is located at the distal end of the tube body or is adjacent to the distal end of the tube body, and at least one section of the traction wire is a free sectionwhich is free outside the tube body; the system is further provided with floating limit strips, proximal ends of the floating limit strips are starting ends fixedly arranged opposite to a fixing heador the core tube assembly, and the floating limit strips float between a mounting portion of the interventional cardiac valve and the outer sheath tube; the outer wall of the fixing head is provided with a positioning part used for being matched with a connecting lug of the interventional cardiac valve, the connecting lug is completely released in front of the outer sheath tube, and the floating limit strips are bound by the outer sheath tube to keep the cooperation between the connecting lug and the positioning portion.

The invention relates to a high-yield 'cellulose, hemicelluloses and lignin enzyme' straw decomposition additive and a preparation method thereof. The high-yield 'cellulose, hemicelluloses and ligninenzyme' straw decomposition additive comprises the following preparation raw materials: a cellulose, hemicelluloses and lignin enzyme mixture, plant materials, sugar and urea, wherein the cellulose, hemicelluloses and lignin enzyme mixture consists of cellulase bacillus subtilis fermentation liquor, a rhizopus oryzae fermentation substance and ligninase white-rot fungi fermentation liquor; the weight ratio of the cellulase bacillus subtilis fermentation liquor to the rhizopus oryzae fermentation substance to the ligninase white-rot fungi fermentation liquor is 3-7 to 5-10 to 5-10. By adoptingthe high-yield 'cellulose, hemicelluloses and lignin enzyme' straw decomposition additive provided by the invention, different bacterial florae can harmoniously coexist and be mutually promoted, an effect of complementary advantages can be achieved, the effective viable count can be increased, the enzyme yield can be increased, cellulose, hemicelluloses and lignin in crop straw can be rapidly andeffectively decomposed, and rapid treatment and circulation of straw biomass resources can be achieved.

The invention discloses a modularized treatment device and method for selective laser melting powder of precious metal. Through guide rails installed on a horizontal base table, a mobile base table is driven by a drive device to horizontally move on the horizontal base table along the guide rails; an opening is formed in the bottom of the mobile base table, and a protective cover type recovery box is arranged above the opening; when the mobile base table moves to the part above a forming area, the opening is connected to the forming area in a butt joint mode. The protective cover type recovery box, a detachable module plate and the mobile base table form the powder treatment device together; the protective cover type recovery box stops above a laser scanning area in the machining process and forms a partial isolation area, the liquid drop spattering and powder splashing phenomena generated in the laser scanning process are isolated inside the protective cover type recovery box, and therefore the powder pollution problem in the machining process is effectively solved; unmachined powder inside a forming cylinder can be completely and fast recovered after machining.

The present invention relates to a method for integrated treatment of dyeing wastewater by using magnetic activated carbon. According to the method, an improved magnetic activated carbon adsorption process and an Fe3O4-H2O2 based Fenton-like technology are organically combined based on the preparation of a PAC-Fe3O4 composite material, and a dyeing wastewater treatment technology integrated with adsorption and regeneration is proposed, and the materials after adsorption can be synchronously regenerated by using the Fenton-like technology in the processing system. According to the method, the adsorption property of the PAC-Fe3O4 composite material and the Fe3O4 Fenton-like catalyst characteristic are fully used. At the time that the material performs adsorption effect on the dye pollutants, H2O2 is synchronously added to form a Fe3O4-H2O2 Fenton-like system to perform regeneration, so that the processing ability of the system is effectively improved, and the processing cost is lowered. The advantages of a pure PAC process and a conventional Fenton process are organically combined, so that the shortages that the conventional PAC and the treated wastewater are difficult to separate are easily to be lost, and cannot be regenerated are solved, and the problems that ferric salt needs to be continuously added in the conventional Fenton process, and the sludge output amount is large are improved. The method has the advantages of being simple, efficient, economical and the like, thereby having a large potential market in dyeing wastewater treatment applications.

The invention discloses a magnetically-separable multiplex photo-catalyst, and a preparation method and an application thereof. The preparation method is characterized in that the preparation method comprises the steps that Fe3O4 columns enter interlayers, hole channels and the surface of natural sepiolite soil in a supporting manner with a chemical method to ensure that the natural sepiolite soil achieves negative magnetism; butyl titanate is dissolved in absolute ethyl alcohol; anhydrous acetic acid is dropwise added and serves as a hydrolytic inhibitor; then magnetic sepiolite is added and stirred, and reacts to form a liquid A; distilled water is added to absolute ethyl alcohol to form a solution; a pH value of the solution is adjusted to 2-3 with nitric acid at a ratio of 1:1; a liquid B is obtained, then dropwise added to the liquid A slowly, and stirred quickly, reacts for 30-60min, and is subjected to standing and aging for 12-24h to form gel; the gel is washed, subjected to magnetic separation, dried, calcined and ground, and passes through an 80-mesh sieve; and the multiplex photo-catalyst is obtained. The multiplex photo-catalyst is good in adsorbability and photocatalytic activity, wide in response range of an optical wavelength, and magnetically-separable, and can be applied to treatment of heavy metal Cr(VI) and organic 2,4-DCP (2,4-Dichlorophenol) coexisting degradation-resistant waste water.

The invention discloses a preparation method of a magnetic-doped titanium dioxide nanotube, comprising the following steps: firstly, in glycol electrolyte of ammonium fluoride, taking a ferro-titanium alloy foil as a positive pole and a Pt sheet as a negative pole, and then obtaining a highly-ordered Fe ion-doped TiO2 nanotube by an anodic oxidation method; secondly, placing the Fe ion-doped TiO2 nanotube into a reaction kettle containing NaOH concentrated solution for heating treatment so that Fe2O3 in the nanotube is transformed into Fe3O4 with strong magnetic property to obtain the magnetic-doped TiO2 nanotube; and finally, roasting the magnetic-doped TiO2 nanotube and cooling in a medium to obtain the anatase magnetic-doped TiO2 nanotube. By adopting the preparation method, the highly-ordered doped Fe2O3 in the nanotube is transformed into the Fe3O4 with strong magnetic property, thus improving the electronic transmission capability on the surface of the nanotube, and effectively promoting application of TiO2 to the fields of a solar cell, photocatalysis and the like.

The invention provides an unmanned aerial vehicle recovery device and method based on a hydraulic lifting and mechanical hand locking structure and belongs to the technical field of unmanned aerial vehicle recovery. The device comprises a lifting device, locking devices, a recovery vehicle and a control system. The lifting device and the locking devices are all connected with the control system, meanwhile, the control system is in communication connection with an unmanned aerial vehicle, the lifting device is installed on the recovery vehicle, is of a scissors fork type lifting structure and achieves stretch and retraction through hydraulic transmission so as to achieve a lifting function, and the locking devices are installed at the top of the lifting device and used for fixing the unmanned aerial vehicle. The method includes the steps that when the unmanned aerial vehicle finishes a task or encounters an emergency and needs to land forcibly, the lifting device drives the locking devices to ascend, after the unmanned aerial vehicle lands, the locking devices start to work, a mechanical hand is closed tightly, and the unmanned aerial vehicle is fixed through the locking devices. Compared with the prior art, the recovery efficiency of the unmanned aerial vehicle is improved, and the unmanned aerial vehicle is recovered more conveniently and quickly.

According to the invention, young leaves or stems of plants of Psammosilene tuniceoides W. C. Wu et C. Y. Wu are taken as an explant to successfully induce callus of the Psammosilene tuniceoides W. C. Wu et C. Y. Wu, and a callus culture system of the Psammosilene tuniceoides W. C. Wu et C. Y. Wu under the conditions of light and dark cultivation is established to induce the differentiation of the callus to produce adventitious roots, thus establishing an adventitious root cultivation system of the Psammosilene tuniceoides W. C. Wu et C. Y. Wu. Moreover, the content of total saponins of the Psammosilene tuniceoides W. C. Wu et C. Y. Wu is determined, and the conditions and parameters of plant cell culture are further optimized, thus establishing a high-yield cell culture system of the Psammosilene tuniceoides W. C. Wu et C. Y. Wu. Therefore, the plant cells of the Psammosilene tuniceoides W. C. Wu et C. Y. Wu are cultured in a large scale to produce the adventitious roots which substitute for the original plant of the Psammosilene tuniceoides W. C. Wu et C. Y. Wu to be used as medicine.

The invention provides an automatic glue dispenser for a linear module rectangular coordinate. The automatic glue dispenser for the linear module rectangular coordinate comprises an electric telescopic rod, a scraper, lantern rings, a flow guide pipe, glue leakage holes, resistance heating wires, a liquid collection table and a glue liquid collection box, wherein the electric telescopic rod is mounted on the lower end surface of a glue storage tank; the scraper is mounted in the middle of the inner annular side surface of the lantern rings; the lantern rings are fixed on the lower end surfaceof the electric telescopic rod and are mounted on the outer surface of a glue dispensing head in a sleeving manner. According to design of the automatic glue dispenser, residual glue remained on the surface of the glue dispensing head of the automatic glue dispenser is quickly cleaned, and a cleaning effect is good; the glue leakage holes are formed in a glue dispensing table, the resistance heating wires are mounted in the glue dispensing table, the liquid collection table is mounted on the lower end surface of the glue dispensing table, the flow guide pipe is mounted in the middle of the lower end surface of the liquid collection table, and the glue liquid collection box is mounted on the lower end surface of the liquid collection table. According to the design, quick recycling of the residual glue is realized, and the recycling rate of the glue liquid is increased. The automatic glue dispenser for the linear module rectangular coordinate disclosed by the invention has a reasonable structure and a good treatment effect on the residual glue; moreover, the practicability is strong, and the reliability is high.

The invention relates to a utilizing method for producing zinc oxide products by utilizing zinc-containing dust ash of a steel plant and recycling ferric carbon for returning to smelting. Zinc in the dust ash is leached by use of an ammonia method; materials which have the zinc content greater than 15% and contain non-vulcanized zinc are added for increasing the concentration of a zinc solution; leachate is purified, cleaned and subjected to ammonia distilling, and zinc oxide is prepared after electrolytic zinc preparation or zinc deposition; and original dust ash tailings or screened dust ash tailings are sent into a blast furnace for smelting, or a conventional pyrogenic process is adopted for recycling ferric carbon from the original dust ash tailings or the screened dust ash tailings, and collected secondary zinc oxide dust ash is used for the front end leaching, so that the zinc concentration of the leachate is increased. The utilizing method can be applicable to dust ash, with the zinc content as lower as 4% or even lower, of the steel plant; by use of a conventional method, the zinc extraction rate and the removing rate of harmful substances including alkali metal, fluorine and chlorine are both above 90%; the dust ash tailing recovery process is high in equipment adaptability, and appropriate treatment processes can be chosen according to existing equipment; and efficiency is high, the environment is protected, and comprehensive cyclic utilization of the zinc-containing dust ash is achieved.

The invention discloses a hydrothermal lithium supplement-spray remodeling regeneration method for a waste ternary positive electrode material. The method comprises the following steps: deeply discharging, disassembling and separating the waste ternary lithium battery; putting a positive electrode aluminum foil into a sodium hydroxide solution, and drying, calcining and grinding the stripped wasteternary lithium battery positive electrode material to obtain powder; adding the powder into organic acid for surface activation, then adding a lithium salt solution for hydro-thermal treatment, andthen taking the mixture as a seed crystal to be mixed with a nickel source, a manganese source and a cobalt source to obtain turbid liquid with uniform components; carrying out spray granulation remodeling on the turbid liquid to obtain an NCM precursor, and carrying out two-stage sintering on the NCM precursor and industrial oxygen to obtain a regenerated ternary positive electrode material. According to the invention, the environment-friendly and short-process recycling of the waste ternary positive electrode material is achieved, wherein in-situ repair of lithium can be rapidly achieved inthe hydrothermal lithium supplementing process, and the ternary positive electrode waste obtained after lithium supplementing serves as a seed crystal; in combination with the spray granulation technology, structure remodeling and controllable preparation of the ternary positive electrode material can be achieved.

The invention provides a material detecting apparatus comprising a frame. The frame includes a worktable and a transport frame. The material detecting apparatus further comprises a material feeder and a vibration feeding tray which are disposed at an upper end of the worktable, a transport assembly device disposed on the upper end of the transport frame, a visual inspection device disposed over the transport frame, and a material drying device. The outside of a discharge guide rail is coated with a polyoxyethylene-styrene block copolymer vibration absorption layer and a linear vibration material feeder is disposed on the lower end of the discharge guide rail so that stable and effective material feeding can be achieved. The material detecting apparatus uses two visual inspection steps so as to improve detection quality and efficiency, and is equipped with a material device which is controlled by a lifting cylinder to drive a servo motor and a light emitting device to ascend and descend. The servo motor controls the rotation of the light emitting device to carry out omnibearing irradiation drying on a metal profile, thereby achieving an extreme drying effect and preventing dust from adhering to the surface of the material and further influencing the detection of the material.

The invention relates to a CoFe2O4 / nitrogen-doped sludge-based activated carbon catalyst for activating persulfate to perform advanced treatment on coking wastewater, which takes nitrogen-doped sludge-based activated carbon as a carrier, and a composite metal oxide cobalt ferrite CoFe2O4 of a spinel structure as an active component. The preparation method comprises the following steps: firstly converting concentrated sludge of a coking plant into sludge-based activated carbon, and then preparing the catalyst by calcining the sludge-based activated carbon by adopting a polymer-network gel method by taking nitrate of cobalt and iron as a precursor and taking acrylamide as a nitrogen source. The preparation method disclosed by the invention is simple and efficient, polyacrylamide formed by virtue of acrylamide polymerization synchronously realizes nitrogen doping of the sludge-based activated carbon and uniform loading of CoFe2O4, and therefore, not only is the catalytic synergistic effect of the carrier enhanced by sufficiently utilizing structuralized nitrogen, but also the catalytic effect of CoFe2O4 can be enhanced, so that the catalytic performance of the catalyst is remarkably improved. In addition, the catalyst prepared according to the invention remains that CoFe2O4 has magnetism, rapid recycling can be realized under the effect of a magnetic field, and sludge treatment ofthe coking plant is solved.

The invention provides a smart card test number control method, device and system. The method comprises the following steps of obtaining a target test number required in the current-time test from a plurality of preset test numbers; generating a write-in command corresponding to the target test number; writing the target test number into a smart card to be tested via the write-in command; sending a recovery command to the smart card to be tested; recovering the target test number in the smart card to be tested; marking the target test number to be unused. According to the method, the processes of manned programming and command writing-in and recovery execution are completely integrated into a processor; a writing-in and recovery command is automatically generated by the processor; according to the writing-in and recovery command, the target test number is automatically written in and recovered to the smart card to be tested; the defect of complex artificial operation of the target test number is overcome; the writing-in and recovery process of the target test number is convenient and quick; the test number can be subjected to centralized management; the problems that numbers are lost and the like are avoided.

The invention belongs to the field of electric wires and cables and relates to a high temperature resistant flexible deintercalating / removing and signal transmission long line cable used for aerospace. The high temperature resistant flexible deintercalating / removing and signal transmission long line cable used for the aerospace comprises a cable core and an outer sheath layer covering the exterior of the cable core, wherein the cable core comprises multiple groups of inner cores; each group of inner cores comprises a plurality of mutually-twisted insulating wire cores and a metal shielding layer covering the exteriors of the plurality of mutually-twisted insulating wire cores; each insulating wire core comprises a conductor and an insulating layer covering the exterior of the conductor; and the outer sheath layer is a high temperature resistant fiber braiding layer. The cable disclosed by the invention has the performances of high temperature resistance, flexibility, high flame retardancy and the like, is safe and reliable to use and can be widely applied to the fields of aerospace and the like.

The invention relates to an additive manufacturing method and device. An AM device comprises a data analysis unit, an additive manufacturing unit, a module embedding unit and a feedback unit, wherein based on the additive course data finished by the additive manufacturing unit and the inserting point-in-time and module material, quantity, shape and arrangement mode provided by the data analysis unit, the module embedding unit embeds, connects or inserts a module in or onto an object carrying out additive manufacturing in progress. Through adding the module during the additive manufacturing process, the manufacturing efficiency is improved; through introducing the module during the additive manufacturing process, the multi-material mixing manufacturing process of the additive manufacturing object is realized; and moreover, the module introduced during the additive manufacturing process can be rapidly recycled when the additive manufacturing object is discarded, so that the product upgrading cost is reduced, and the raw material is saved.

The invention discloses recycled concrete, which is characterized by being prepared from the following raw materials in parts by weight: 150-180 parts of cement, 250-300 parts of modified recycled aggregate, 400-450 parts of fine river sand, 5-10 parts of attapulgite, 1-3 parts of porous beta-cyclodextrin cross-linked polymer nanofibers, 50-65 parts of blast furnace slag, 1-3 parts of mullite fibers, 2-5 parts of diazoalkyl urea, 4-8 parts of sulfonate-terminated hyperbranched waterborne polyurethane emulsion, 2-4 parts of additives and 75-90 parts of water. The recycled concrete is prepared from the following raw materials in parts by weight: 2-4 parts of carboxyl-terminated liquid fluororubber and 1-3 parts of water-soluble hyperbranched epoxy resin. The invention also discloses a preparation method of the recycled concrete. The recycled concrete disclosed by the invention is excellent in comprehensive performance, high in strength, low in water absorption rate, good in durability and workability and good in workability.

The invention belongs to the data processing technical field, and provides a point circulation data processing method and platform; the method comprises the following steps: receiving interaction data between the first and second users; updating the points of the first and second users according to the interaction data and preset point circulation adjusting rules. The point circulation data processing method and platform can fast and flexibly circulate and utilize marketing points, thus simplifying the processing process, and accelerating the point processing progress.

The invention relates to the technical field of facial mask processing, in particular to a non-woven fabric cutting device for facial mask production. The non-woven fabric cutting device comprises a conveying rack, a non-woven fabric conveying belt, two conveying belts I, a motor, two vacuum pumps, two conveying belts II, a cutting box and a hydraulic cylinder, wherein the non-woven fabric conveying belt is fixedly mounted in the conveying rack. According to the non-woven fabric cutting device, a cutting mechanism and material suction mechanisms are arranged, two cutting tools can linearly move in a face-to-face or back-to-back manner, then the cutting operation suitable for non-woven fabrics with different shapes is realized, thus the application range of the cutting device is enlarged, meanwhile, edge warping preventing mechanisms are utilized, thus the problem that a cutting surface is not smooth enough due to edge warping of the non-woven fabric in the cutting process is solved, inaddition, non-woven fabric slitter edges at different positions can be sucked into material suction channels through suction force parallel to the non-woven fabric conveying belt generated in the material suction channels, and then the adverse effect of chippings on the cutting environment is greatly reduced.

The invention relates to a method for extracting and separating rhenium from rhenium-containing slag. According to the technical scheme, the method comprises the following steps of: adding acid solvent of which the volume is 10 times as that of the rhenium-containing slag into rhenium-containing slag; heating material liquid at the temperature of between 60 and 80 DEG C for 60 to 90 minutes afterdissolving the rhenium-containing slag; adding sodium hydroxide of which the weight is 1 to 10 percent of that the material liquid in to the material liquid; cooling to a room temperature, filtering,and heating and evaporating filtrate to remove the most moisture; adding precipitating agents, aniline blue and aniline black, of which the weight is 1 to 5 percent of the residual filtrate into the residual filtrate, and stirring for 30 minutes; filtering, and inputting hydrogen sulfide into the filtrate; and stirring, overnight aging, collecting precipitate at the bottom, and thus obtaining rhenium products. The method is simple, the rhenium is quickly recovered, the recovery rate of the rhenium is more than 80 percent, and the economic benefit, the social benefit and the environmental benefit are obvious.

The invention discloses a magnetic oxidized graphene loaded phosphine Schiff base palladium catalyst and a preparing method and application thereof. Oxidized graphene prepared through an improved Hummers method serves as a catalyst carrier, phosphine Schiff base serves as ligand, palladium salt serves as an active component, the loading capacity of palladium particles accounts for 5.0-10.0% of the total mass of the catalyst, and the particle size is 5-15 nm. The prepared catalyst is high in stability and capable of preventing precious metal palladium from aggregating or losing; the catalyst has high catalytic activity and can efficiently promote the Heck coupled reaction; more importantly, due to good magnetic response, the catalyst can be fast recovered and reused through simple magnetic separation under the action of an external magnetic field, and practicability is high.

The invention discloses a hydraulic pedal type telescopic ground-pulled double-screen projection screen. The hydraulic pedal type telescopic ground-pulled double-screen projection screen comprises a screen module, a storage module, a lifting module and a support module; the screen module is used for receiving light transmitted by a projector, and displaying the image at the same time; the storagemodule is connected with the screen module, and used for rolling the screen module and storing the screen module in a storage box; the storage module is connected with the lifting module; a hydraulicstructure is arranged below the lifting module; a control pressure rod below the lifting module is pressed, so that the storage module can be lifted and adjusted; the support module is connected withthe lifting module, arranged at the bottom of the lifting module, and used for fixing the lifting module; the support module can be unfolded and folded by pressing a folding and unfolding fixing button arranged on the support module; due to the lifting module with the hydraulic rod, the height of the screen can be adjusted simply and conveniently; and thus, the projection screen is simple in structure and convenient to carry.

The invention relates to the technical field of numerical control machine tool machining, in particular to a cutting fluid circulating device for a numerical control machine tool and a using method ofthe cutting fluid circulating device. The cutting fluid circulating device comprises a base and a recycling barrel, wherein a liquid level sensor is fixedly arranged on the inner wall of the recycling barrel; and the cutting fluid circulating device further comprises a controller, a filtering mechanism, a proportioning mechanism and a stirring mechanism, wherein the filtering mechanism comprisesa filtering box, a shaking assembly and a pushing assembly, the proportioning mechanism comprises a storage box and a proportioning assembly, the stirring mechanism comprises a driving motor, a rotating shaft and a stirring assembly, and the driving motor, the liquid level sensor, the shaking assembly, the pushing assembly and the proportioning assembly are all electrically connected with the controller. According to the cutting fluid circulating device for the numerical control machine tool and the using method of the cutting fluid circulating device, cutting fluid contaminated on cutting chips can be fully separated out, and more cutting fluid cannot be left on the surfaces of the cutting chips, so that the utilization rate of the cutting fluid is increased, and cyclic utilization of thecutting fluid is facilitated; and meanwhile, the cutting chips in a collecting box are dried in time, so that the cutting chips can be rapidly recycled.

The invention discloses a method to recycle phosphorus from farm waste and relates to the technical field of agriculture. The method comprises: mixing animal dry excrement and dolomite powder, and crushing to obtain a primary mixture; heating the primary mixture in an oxygen-free environment, allowing pyrolysis, and cooling to room temperature to obtain a magnesium-calcium oxide-carried carbon-based composite; adding the magnesium-calcium oxide-carried carbon-based composite into phosphorus-containing farming wastewater, transferring phosphate ions into pores or mineral structure of the magnesium-calcium oxide-carried carbon-based composite to obtain a secondary composite; subjecting the secondary composite to solid-liquid separation to obtain the separated solid matter, phosphorus-rich material. The pig manure and dolomite are used to prepare an adsorbing material, having low cost; the materials are taken in situ; the method is environmentally friendly, can adsorb phosphorus effectively, makes reasonable use of dry excrement solid waste from farms, extracts phosphorus from farm liquid waste so that less pollution is caused, and also extracts the phosphorus-rich material; triple purposes are achieved at a time.

Embodiments in the invention provide an electronic waste-plastic waste recovery resource-regeneration system and a method. The system comprises a plurality of electronic waste and plastic waste recovery terminals and a central control terminal. The recovery terminals comprise shells, drive motors, plastic waste adding ports, weighing modules, conveyor belts, smashing modules, material storage drums, central control chips and communication modules. One side of each shell is provided with the corresponding plastic waste adding port. Electronic waste-plastic waste adding ports are provided with doors capable of being opened and closed. The doors are provided with position sensors connected to the central control chips. The electronic waste-plastic waste adding ports are provided with the weighing modules used for weighing. The weighing modules are connected to the central control chips. The bottoms of the weighing modules are provided with inclinable bottom plates. The inclinable bottom plates are connected to the drive motors and the central control chips. The weighing modules are connected to the smashing modules through the conveyor belts. The smashing modules comprise smashing chambers. The smashing chambers are provided with smashing knives. The bottoms of the smashing chambers are provided with doors capable of being opened and closed, and are connected to the material storage drums. The communication modules are connected to the central control chips and are connected to the central control terminal through the network.