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The invention discloses a cerium copper titanium composite oxide catalyst for flue gas denitration and a preparation method. The catalyst comprises the following components: CeO2, CuO and TiO2. The catalyst is prepared by a coprecipitation method and can promote the generation of an ideal denitration effect. The catalyst has the advantages that: 1) the catalyst has the high activity for the catalytic reduction of nitric oxides in flue gas; 2) the adaptive temperature window of the catalyst is wide, namely the catalyst has certain activity within the integral temperature range from 150 to 450 DEG C; 3) the operating performance of the catalyst under the condition of SO2 and H2O can be improved effectively, and the catalyst has the strong adaptivity to severe working conditions in the presence of sulfur dioxide, water and the like and has the wide application range; 4) raw materials for preparation are easy to obtain, a preparation process is simple and the cost of the catalyst is low.

The invention provides an unsaturated hydrocarbon selective hydrogenation catalyst and a preparation method thereof. The catalyst uses alumina as a carrier and palladium as an active ingredient, and is characterized by comprising the following components by weight percentage: 0.1 to 1.0 percent of the palladium, 0.3 to 8.0 percent of a rare earth metal, 0.1 to 5.0 percent of alkaline-earth metal, and 0 to 3.0 percent of fluorine which can also be contained in the catalyst, based on the total weight of the catalyst. The catalyst carrier is theta or mix-crystal type Al2O3, and the priority is given to the theta crystal type. In the invention, the catalyst palladium is preferably distributed in a secondary outer layer of the catalyst. The catalyst has certain impurity resistance and coking resistance, is applicable to a section of selective hydrogenation process in full distillate cracked gasoline and unsaturated hydrocarbon selective hydrogenation process in other distillate oils.

The invention discloses a shielding longitudinal watertight degaussing cable and a production method thereof for ships. A tinned copper wire is impregnated with a sealant and then twisted into a twisted copper conductor which is impregnated with a conductor sealant layer on the periphery, an electro-insulating rubber layer is extruded on the periphery of the conductor sealant layer to form insulation core wires, chloroprene rubber filling bars are filled into gaps between the insulation core wires, and a plurality of insulation core wires are twisted wholly into a cable core. A cable core inner sealant layer, an inner jacket rubber layer, an armor shielding layer and an outer jacket rubber layer are sequentially arranged on the periphery of the cable core. A single wire of the cable conductor is impregnated with the sealant, the twisted copper conductor is impregnated with the conductor sealant layer on the periphery, the cable core inner sealant layer is extruded on the periphery of the cable core to form multiple sealing, the chloroprene rubber filling bars swell during follow-up vulcanization and can fill in the gaps inside the cable core completely, and tangency between the insulation core wires can be avoided, so that the sealant can permeate to the inside of the cable core to guarantee the watertight effect when the cable core inner sealant layer is extruded.

The invention discloses a sludge treatment method, as well as sludge foamed lightweight concrete produced through the method and application thereof. In the method, sludge produced by sewage treatment first reacts with quicklime so as to form sludge hydrated lime; then the sludge hydrated lime is mixed with cement and water so as to form sludge concrete; foaming agent produces foam by utilizing a foaming system of a foaming machine; and the foam is mixed with the sludge concrete. The sludge treatment method can directly obtain the sludge foamed lightweight concrete. The sludge foamed lightweight concrete has a plurality of functions, which can be used as a filling material, a heat insulating material, a walling material, a sound insulation material, a mine tunnel filling material, an artificial landscape manufacturing material, a road recovery material, a pipe base filling material and the like. The sludge treatment method is low in cost and friendly to environment, can directly produce the sludge foamed lightweight concrete with a plurality of functions, and not only solves the sludge treatment problems in the sewage treatment industry, but also ensures the full utilization of the sludge.

A controllable multi-degree of freedom welding robot comprises four controllable four-link-mechanism closed-loop executing mechanism subchains which are in parallel connection and an executing main chain in series connection. A main chain connecting rod can be controlled by the controllable four-link-mechanism closed-loop executing mechanism subchain to move within the surface with the controllable four-link-mechanism closed-loop executing mechanism subchains. The spatial motion of a moving platform can be achieved by the motion of a first connecting rod and a body. According to this arrangement, the spatial motion of an end effector can be achieved, motion inertia is small, dynamics performance is good and reliability is high. The controllable multi-degree of freedom welding robot has the advantages of being compact in structure and easy to control. The rods can be made as light rods, work spaces for mechanisms are large, gravity centers of the mechanisms are moved backwards to keep balance. The controllable multi-degree of freedom welding robot can be widely used.

The invention provides a preparation method of a wide-temperature methanation catalyst. The wide-temperature methanation catalyst comprises the following components in percentage by mass: 5-75% of a carrier, 10-90% of NiO as an active constituent and 1-50% of a metal oxide adjuvant. In the preparation method, the wide-temperature methanation catalyst is obtained in a way of combining a precipitation process and an impregnation method. The obtained catalyst has good methanation activity in a wide-temperate range of 260-800 DEG C, stable performance, long service life and strong practicality, so that the catalyst is suitable for the application in a diversified coal methane industry.

The invention discloses a method for preparing manganese sulfate through the biomass self heating reduction of low-grade manganese oxide ore. The method comprises the following steps: 1) respectively crushing the low-grade manganese oxide ore and biomass material; 2) weighing the low-grade manganese oxide ore, the biomass material and an initiating additive according to the weight ratio of 100:10-30: 0.5-3; 3) mixing evenly and roasting the low-grade manganese oxide ore, the biomass material and the initiating additive; 4) leaching the roasted mass through dilute sulfuric acid at a temperature of between 40 and 80 DEG C, regulating the mixed liquor to make the pH value more than or equal to 6, carrying out solid-liquid separation, and keeping the obtained filtrate for standby; and 5) removing impurities from the filtrate to obtain the manganese sulfate solution. The method adopts renewable energy source of the biomass material to replace coal to reduce the manganese oxide ore and prepare manganese sulfate which can be the raw material for producing electrolytic manganese. The leaching efficiency of manganese can reach more than 95 percent. The method not only saves energy sources, but also reduces the production cost.

The invention discloses a normal-temperature-curing epoxy resin flexible pouring sealant and relates to the technical field of polymer materials. The normal-temperature-curing epoxy resin flexible pouring sealant is prepared by mixing a component A and a component B in equal parts by weight, wherein the component A comprises 60-90 parts of epoxy resin, 10-30 parts of reactive diluent, 5-10 parts of a plasticizer, 1-5 parts of a silane coupling agent, 0.5-2 parts of a defoaming agent, 0.5-2 parts of an antioxidant and 0.5-1 part of an ultraviolet absorber; and the component B comprises 1-3 parts of an accelerator, 30-60 parts of polyether amine and 0-50 parts of modified amine prepolymer I and 0-55 parts of modified amine prepolymer II. The ambient-curing epoxy resin flexible pouring sealant has the characteristics that the pouring sealant can be rapidly cured under the room temperature condition and is especially suitable for pouring LED flexible strips and the cured substance has better flexibility and higher elongation at break and transparency and the like and is suitable for pouring and sealing the surfaces of products having requirements on flexibility and transparency, for example, surface coating of LED flexible strips, LED module strips, flexible circuit boards and the like.

The invention discloses a preparation method of a graphene/carbon fiber composite. The preparation method comprises the steps: firstly, with graphite powder or natural flake graphite as the raw material, directly and ultrasonically stripping the graphite powder or natural flake graphite in an organic solvent to prepare a graphene dispersing solution; then, adding an organic amine salt with aromatic groups into the obtained graphene dispersing solution to enable the graphene to have positive charges because of adsorbing organic amine ions; next, depositing the graphene with the positive charges on carbon fiber or a carbon fiber product under the action of an external electric field to form the graphene/carbon fiber composite with the organic amine salt; and finally, removing the organic amine salt through thermal treatment to obtain the graphene/carbon fiber composite, wherein the organic amine salt is deposited in an electrophoresis deposition process. The method has the advantages of simplicity in operation, low cost, good uniformity of the graphene/carbon fiber composite, easiness for control and the like.

The invention provides a method for recycling waste clay, which comprises the following steps of: removing impurities from construction waste materials through treatment processes such as crushing, impurity removal, iron removal, sieving and the like, and preparing the materials into a recycled aggregate meeting the requirement of grinding equipment on particle size; burning up combustibles in the recycled aggregate through a calcining process to reduce ignition loss and water content; separating a concrete component from a clay brick component in the recycled aggregate; and grinding the clay brick component to obtain regenerated powder. By the method, waste clay brick resources can be fully utilized by a simple process; moreover, the regenerated clay powder obtained in the production has good performance, wide application range and high added value.

The invention discloses a mercury-free catalyst and especially relates to a mercury-free catalyst for acetylene hydrochlorination synthesis of vinyl chloride. The mercury-free catalyst comprises a composite carrier composed of active carbon and a metal oxide, and at least one of cobalt, manganese, copper, zinc, bismuth, barium and potassium as active ingredients. The mercury-free catalyst utilizes the composite carrier composed of active carbon and metal oxide, has dual properties of active carbon carriers and metal oxide carriers and has high acetylene hydrochlorination catalytic activity. Through interaction of the composite carrier and the active ingredient, the catalyst can produce weak and fast chemisorption of hydrogen chloride (as acetylene hydrochlorination raw material gas) so that the mercury-free catalyst for acetylene hydrochlorination is obtained. Through special properties of the composite carrier and special action of the active ingredient and the composite carrier, the catalyst has high reaction activity and is a novel mercury-free catalyst with good activity, strong stability and high selectivity. The mercury-free catalyst has the advantages of simple production processes, short production period and low production cost.

The invention relates to the field of teaching and provides an electronic building block module and an electronic building block teaching aid. The electronic building block module comprises a circuit board, a first connecting block and a second connecting block. The circuit board is connected between the first connecting block and the second connecting block. The outer wall of the first connecting block is provided with a data input connector, and the outer wall of the second connecting block is provided with a data output connector. The outer walls of the first and second connecting blocks are fixedly provided with first magnets and second magnets, respectively. N poles of the first and second magnets face in a same direction. The electronic building block teaching aid is composed of a plurality of electronic building block modules. The electronic building block modules are magnetically assembled, and the modules cannot be connected when the polarities are opposite so that it is possible to prevent mistaken assembly and facilitate assembly. Both children older than eight and adults can learn basic electronic knowledge from the electronic building block teaching aid and gain cultivation of logic thinking ability and development of creative thinking.

The invention discloses an efficient cutting device for steel wire rope machining and a cutting method in the technical field of steel wire rope machining. The efficient cutting device comprises a bottom plate; a control switch is arranged at the top of the outer wall of the right side of a vertical plate; a pushing rod handle is arranged at the bottom of the outer wall of the right side of the vertical plate; the outer wall of the circumference of a gear is engaged with the inner wall of a tooth plate; a cutting motor is arranged at the left end of the bottom of a supporting plate; the outerwall of a roller is wound with steel wire ropes; a fixture box body is arranged on the right side of the top of the bottom plate; and a cutting table is arranged in the center of the top of the fixture box body. The efficient cutting device is simple to operate; clamping blocks are hinged with the two ends of each arc-shaped chuck, so that the efficient cutting device has movable activity, the steel wire ropes in different specifications are clamped conveniently, the more accurate location of the steel wire ropes is facilitated, and stress in every direction is kept uniformly; buffering columns are contacted with the steel wire ropes in advance, buffering springs contract due to the stress, so that a buffering effect is exerted, and bruise and damage on the surface of the steel wire ropesdue to the excessive stress are avoided; and two clamping plates are used for clamping the steel wire ropes, so that stable cutting of a cutting knife on the steel wire ropes is facilitated.

The invention provides a heterodinuclear metallocene compound represented by the following structural formula, therein, M represents the lanthanon, R is chosen from methyl, ethyl, isopropyl, allyl (butyl-3-olefin), hexyl-5 olefin, octyl-7 olefin, cyclohexane or benzyl. The invention also provides the preparation process for the compound. The compound is coordinated with the alkyl aluminoxane (promoter) for olefin polymerization, has high polymerization reaction activity, and can obtain olefin polymerization products with the distribution of high molecular weight and wide molecular weight.

The invention discloses high-fat and high-dietary-fiber composite animal and plant powdered oil. The powdered oil is prepared from, by weight, 20-40 parts of core materials, 60-160 parts of wall materials, 1-10 parts of an emulsifying agent and 0.01-0.5 part of an antioxidant agent, wherein the core materials are prepared from animal fat accounting for 5-15% of the total weight of the core materials and plant oil accounting for 85-95% of the total weight of the core materials; the wall materials are prepared from protein accounting for 5-80% of the total weight of the wall materials and dietary fiber carbohydrate accounting for 20-95% of the total weight of the wall materials. The invention further discloses a preparation method of the high-fat and high-dietary-fiber composite animal and plant powdered oil. The high-fat and high-dietary-fiber composite animal and plant powdered oil can supplement fatty acid lacking in a human body and can also supplement high-quality protein and dietary fibers essential for a human body. According to the high-fat and high-dietary-fiber composite animal and plant powdered oil prepared through the preparation method, and protein still has activity, is overhead-price protein and has the advantages of being easy to digest and high in nutrient content.

The invention discloses a ferroferric oxide porous ball having a micro-nano structure, and a preparation method of the ferroferric oxide porous ball. The ferroferric oxide porous ball having the micro-nano structure is prepared by annealing a ferrous carbonate porous ball having the micro-nano structure under the atmosphere of argon; the ferrous carbonate porous ball having the micro-nano structure is prepared by mixing ferric trichloride, urea and ascorbic acid; absorption and reduction of the synthesized ferroferric oxide porous ball having the micro-nano structure to heavy metal hexavalent chromium ion are tested. During preparation of ferrous carbonate by a hydrothermal process, a dispersing agent and a surfactant are not required; and substances such as a template are absent, so the ferroferric oxide porous ball having the micro-nano structure is environment-friendly, and aftertreatment is convenient; moreover, the reaction temperature is low and the process is simple; and due to a porous structure, the ferroferric oxide porous ball having the micro-nano structure prepared by the method has high specific surface and high activity of the nano structure, and can prevent gathering of particles effectively.

The invention discloses a lithium ion battery ternary material with a double-coated surface. The lithium ion battery ternary material with the double-coated surface comprises a nickel-cobalt-manganeseternary material, wherein a lithium-rich layered oxide coating layer is covered on a surface of the nickel-cobalt-manganese ternary material; an aluminum fluoride coating layer is covered on a surface of the lithium-rich layered oxide coating layer; the lithium ion battery ternary material with the double-coated surface is not easy to fall off, and has good chemical stability and high capacity. The invention also discloses a preparation method of the lithium ion battery ternary material. The method comprises the steps of firstly adopting an organic complexing agent-auxiliary sol-gel method for covering lithium-rich layered oxide on the surface of the ternary material so as to form the lithium-rich coating layer; then using a liquid phase method for coating aluminum fluoride on the surfaceof the lithium-rich layered oxide coating layer, and obtaining the double-coated lithium ion battery ternary material. The preparation method is simple in process, high in operation feasibility, andhigh in element utilization rate.

The invention discloses a preparation method of natural lemon slice and fruit powder. The preparation method comprises the following steps: (1) slicing lemon fruit and performing dipping treatment, then carrying out microwave vacuum drying till the water content of lemon fruit slices is 12wt% to 15wt%; (2) then carrying out hot-air drying on the lemon fruit slices, then drying by using a hot-air drying oven till the water content of the fruit slices is lower than or equal to 9wt%, and then packing to obtain lemon slices; and (3) finally crushing the lemon slices into 80-100 meshes through a crusher so as to obtain lemon fruit powder. The method combines vacuum microwave puffing treatment and lemon slice preparation by hot-air drying and preparation of a natural fruit powder product, the color, flavor and nutrient content of the prepared product are effectively stored, and the product quality is improved. Along with the growth of the living standard of people and attention to food safety, the preparation method can be applied to composite vegetable and fruit powder and natural health leisure food. Moreover, through vacuum microwave drying, the processing cycle is shortened, the energy is saved, and the consumption is reduced.

The invention relates to a floating floor device applied to water body ecological restoration. According to the technical scheme, the floating floor device applied to water body ecological restoration is characterized by comprising control columns, a heat preservation hood, a heat preservation enclosure ecosystem and a floating floor, wherein at least three control columns are available; the heat preservation hood is made of a light permeable film and is arranged above the control columns through support rods so as to form a conical hood; the lower side of the heat preservation hood is parallel to the top ends of the control columns; the heat preservation enclosure ecosystem surrounds at the periphery of the control columns through the cooperation of the control columns; the lower side surface of the heat preservation enclosure ecosystem is contacted with mud at the bottom of a water body; the upper side surface of the heat preservation enclosure ecosystem is parallel to the top ends of the control columns; and the floating floor is on the water level inside a relative sealed chamber. By adopting the scheme, the problems that in the conventional opened floating floor, plants hardly grow in winter and are easily affected by external pollution resources are effectively solved, the growth of aquatic plants on the floating floor is well prompted, and the purification of the water body is effectively realized.

The invention discloses a method for preparing a three-dimensional ordered porous lead dioxide membrane electrode by a template electro-deposition method. The method comprises the steps of preparing an antimony-doped tin dioxide intermediate layer on a porous titanium matrix via a sol-gel method, assembling a polystyrene sphere mono-dispersion serving a template agent to the intermediate layer via natural settlement, then preparing a lead dioxide active layer in the gap of the template agent via an electro-deposition method, and finally dissolving the template agent to obtain the lead dioxide membrane electrode with a porous structure. The lead dioxide membrane electrode has three-dimensional ordered porous structure, large specific surface area, many electrochemical active sites and large filtration flux, overcomes the defects that the traditional lead dioxide electrode has a compact structure and cannot be applied to a filtering electrochemical system, and has great application value in the electrochemical catalysis field.

The invention relates to an artificially cultured black termitornyces albuminosus berk heim entity and a culture method thereof. The method comprises the following steps: finely selecting wide collected black termitornyces albuminosus berk heim to obtain pure strains by a tissue and spore separation method; carrying out stock spawn preparation and mother seed and culture seed preparation; using cotton seed hulls, broad-leaved tree sawdust, various crop straws and forestry leftovers as major culture raw materials to be matched with additives of wheat bran, corn powder, rice bran and mineral elements as a culture medium; using artificial temperature, humidity, air and light illumination control and mushroom loosening measures for auxiliary effect under the condition of natural environment; and realizing the annual culture to obtain large-blade thick-stipe twisting black termitornyces albuminosus berk heim entities with light brown or dark brown to darkish brown pileus and stipe surfaces. The artificially cultured black termitornyces albuminosus berk heim has the advantages of tender flesh quality, crisp soft smooth and cooling effect and delicious taste. The weight of a fresh single blade is about 50 to 200g, the processing and the eating are convenient, and the artificially cultured black termitornyces albuminosus berk heim has higher eating and medicine values. The invention has the characteristics of low cost, easy realization and the like, and can be widely applied to the scaled annual culture of the black termitornyces albuminosus berk heim.

The invention discloses a method for preparing TiO2 film by utilizing a sol-gelatin method. The method comprises the following steps: (1) dissolving Ti (OC4H9) in ethylene glycol monoemethyl ether, then adding acetylacetic ether and methanamide, adding a pH regulator solution after stirring, continuously stirring the mixture to obtain uniform and transparent TiO2 sol with light yellow color, standing and maturing the mixture for later use; (2) dropwise adding the TiO2 sol after maturing to the surface of a substrate to be coated for film coating, putting the substrate in drying cabinet for predrying, putting the substrate in a cabinet-type high temperature resistance furnace for heat treatment, naturally cooling the substrate to a room temperature, putting an obtained film in a high temperature steam kettle for treatment, and then putting the film in boiling water for treatment to obtain the TiO2 film. In the invention, cross-linking agent formamide is added to a sol precursor solution; steam and hydrothermal joint treatment is carried out on the TiO2 film after heat treatment, therefore, internal stress and surface checkmarks of the TiO2 film prepared by the sol-gelatin method areeliminated or weakened, and the film has the advantages of more smooth and compact surface, complete coverage, favorable surface uniformity, uniform thickness and better practical use performance.

The invention belongs to the technical field of environmental pollution, in particular to a method for enhancing the petroleum pollution removing effect of seawater. The method comprises the following steps of: culturing high-yield biological surfactant bacteria and efficient petroleum degrading bacteria cultured and screened in a biological trickling filter in a mixed way by taking chitosan as a carrier, and performing freeze drying to obtain a microbial agent (bacterial powder); and treating petroleum pollution simulation seawater with the bacterial powder, wherein three days later, the initial concentration is 1,700 mg/L, the salinity is 3 percent, the removing rate of total petroleum hydrocarbon in the simulation seawater is over 95 percent, and the total petroleum hydrocarbon concentration in the seawater is lower than the primary standard in the Effluent Standards for Oil-Bearing Waste Water from Offshore Petroleum Development Industry. In the method, chitosan is taken as a carrier, so that microorganisms better float on the sea level and are tightly contacted with pollutants on the surface of seawater, and the petroleum removing rate is increased; moreover, the treatment cost of oil stains is reduced greatly; and the production process of the bacterial powder is safe, the application method is simple, and secondary environmental pollution is prevented.