230results about How to "High degree of controllability" patented technology

The invention belongs to the technical field of environmental protection and environmental water treatment and in particular relates to a heavy metal ion adsorbent ferrite hollow spheres MFe2O4 (M=Fe, Co, Mn or Zn) and a preparation method thereof. The preparation method of the ferrite hollow spheres MFe2O4 belongs to a hydrothermal synthesis method, and the prepared ferrite hollow spheres are 180nm-380nm in diameter and 20nm-45nm in shell layer thickness and are used for adsorbing heavy metal ions As (V) and/or Cr (VI). The preparation method provided by the invention is simple and feasible, environment-friendly, pollution-free, low in equipment requirement and high in controllable degree; the raw material source is wide and the production cost is low; compared with a compound prepared in the prior art, the prepared heavy metal ion adsorbent is relatively high in adsorption capacity, and the adsorption capacity aiming at arsenic and chromium heavy metal ions reaches up to 340mg/g and is far beyond that in the prior art, so that the heavy metal ion adsorbent has relatively good application and promotion values.

The invention discloses a laser scanning method used for fast forming a high-temperature alloy structural member. The method comprises the following steps that (a), according to the geometric feature comprising the area S, the wall thickness H and the shape P and the precision requirement of the structural member, a geometric model of each layer is divided into a plurality of areas, scanning methods for the different areas are determined, and the rectangular-ambulatory-plane shape, the stripe shape and the chess board shape are involved in the scanning methods; (b), forming scanning is carried out, the different areas in each layer are sequentially scanned, and the structural member is formed; (c), the outer surface is scanned, the outer surface of the formed structural member is scanned for the second time, and fast repair and heat treatment on the outer surface of the structural member are realized. According to the method, all the slice layers are divided into areas, the different scanning methods are selected, and therefore the problems of stress deforming and cracking caused by heat concentration are effectively avoided; the mechanical property and the surface precision of the high-temperature alloy structural part fast formed are improved.

The invention provides an in-polluted-site heat-intensifying vapor extracting and repairing integrated device and an application method. The integrated device comprises a high pressure fan, a gas-liquid separation tank, an active carbon absorption tower, an automatic control cabinet, a heating electrode, a flow meter, a vacuum gage, a temperature sensor, a humidometer and an organic pollution gas detector; an extracting pipeline is connected with an extracting well, and the heating electrode is embedded in a polluted area. The specific application method comprises the steps as follows: starting the heating electrode to raise the temperature of the soil in the site and promote the desorption of the pollutant in the soil, then starting the high pressure fan, forming a negative pressure in the pipeline to generate flowing of gas from the extracting well to the outside, taking away the pollutant in the soil from the soil along with the flowing of the gas, and enabling the active carbon absorption tower to absorb the gas pollutant to fulfill the purpose of repairing the polluted site. The in-polluted-site heat-intensifying vapor extracting and repairing integrated device and the application method are used for repairing the soil in the organic polluted site, so that not only the pollutant removal rate is improved, but also the influence of the low temperature condition on the vapor extracting technique is further reduced, the effective repairing working time in winter is prolonged, and the purpose of efficiently treating the polluted site is fulfilled.

The invention relates to a method for producing activated carbon from straws, belonging to the technical field of methods for producing activated carbon. The invention provides the method for producing activated carbon from straws, which adopts the following technical scheme and comprises the following production steps: preparing raw materials in percentage by weight, removing sandy soil, crushing, forming, carbonizing, activating, screening and packaging, wherein before the fourth forming step, adding a fifth carbonizing step; and after the fourth forming step, crushing the formed materials into particles with the particle size of 3-10mm, and then, carrying out the fifth carbonizing step. The straw is cotton straw or paddy straw or jute straw or sorghum straw, the hydrocarbon is coal, and the alkali metal hydroxide is sodium hydroxide. The invention is applied to the technical field of producing activated carbon from straws.

This invention relates to a method to prepare a kind of bioorganic fertilizer and its application. The preparation method includes following steps: a) proliferation and cultivation of microorganism species; b) cultivation of microorganism species against stalk antibody; c) adsorption onto a carrier and drying into organic decomposers; d) preprocessing of organic waste; e) inoculation complex fermentation and f) continuous high-temperature fermentation and nontoxification. This invention has the advantages of advanced technique, low production cost, stable product quality and long fertility persistence and can be widely applied in the production of corns, vegetables, fruits and all kinds of economic crops. Besides, it is a green method makes considerable economic, social and environmental benefits.

The invention provides a preparation method of a nano-crystalline cellulose aerogel and a thermal insulation material. The preparation method comprises the following steps: pre-treating a cellulose raw stock, tetramethyl piperidine piperidine and bromide to obtain a cellulose mixture; in the presence of alkali liquor, carrying out an oxidizing reaction on the cellulose mixture and a strong oxide to obtain an oxidized product; washing the oxidized product after ultrasonic treatment to obtain a nano cellulose suspension; mixing the nano cellulose suspension with acidified alkyl silsesquioxane toobtain a mixed liquid; and atomizing the mixed liquid and freezing and drying the same to obtain the nano-crystalline cellulose aerogel. With cellulose wood pulp as a raw material, fiber bundles aredepolymerized to obtain the nano cellulose suspension, and the nano-crystalline cellulose aerogel with excellent hydrophobicity is obtained by in situ graft modification, spraying and freezing-dryingmethods. The nano-crystalline cellulose aerogel also has a relative low heat conductivity coefficient, and has a wide application prospect in thermal insulation field. The method is low preparation cost, simple to operate, high in controllable degree and good in repeatability.

The invention relates to the technical field of ventilators, in particular to a ventilator integral impeller and method for preparation. An impeller angle is not accurate, which is caused by the affect of many reasons which are machining error, blade installation angle measurement error, electric welding thermal deformation error and worker processing technical level and the like, thereby the intensity of a ventilator fan is reduced, the noise is increased, the work efficiency is low, the power consumption is large and the maintenance ratio is high. In order to overcome the above defects, the invention uses the technical scheme that the ventilator integral impeller comprises a blade, a hub, a spoke and a bearing sleeve, wherein the blade, the hub, the spoke and the bearing sleeve are a whole body which are connected together through casting in one time. The ventilator integral impeller is made through casting in one time, the problems which are common in processing of the impellers such as rosin joint and unclosed riveting and the like do not exist, the intensity is high, the security is excellent, the production cost is low, the energy consumption is saved, the environmental condition is improved, and the economic benefit is increased.

The invention discloses a Cu-doping modified TiO2 photocatalyst. The Cu-doping modified TiO2 photocatalyst grows on a copper-titanium alloy wire or bar base body and has a two-dimensional structure on the peripheral surface of the copper-titanium alloy wire or bar base body, and the structural unit of the Cu-doping modified TiO2 photocatalyst is a Cu-doping TiO2 nanotube. The invention also discloses a preparation method of the Cu-doping modified TiO2 photocatalyst. The preparation method can be used for directly growing a Cu-doping TiO2 nanotube array which has the two-dimensional structure and higher visible light response property on the copper-titanium alloy wire or bar base body through an electrochemical anode oxidation method. The Cu-doping TiO2 photocatalyst with the two-dimensional structure, which is disclosed by the invention, enlarges the specific area of a TiO2 photocatalyst and effectively extends the forbidden bandwidth of the TiO2 photocatalyst, thereby outstandingly enhancing the adsorptive capacity on a degradation product and obtaining the high-efficiency absorption on a solar spectrum; and the Cu-doping TiO2 photocatalyst is conductive to improving the visible light catalytic activity and has the advantages of good recoverability of the TiO2 photocatalyst, simple process, low cost and high controllable degree.

The invention provides a dismountable skeleton tool, and a dismounting device and a dismounting method for dismounting the tool. The dismountable skeleton tool comprises two cover plates, a hub and screws, wherein the hub is formed by splicing two semicircular hollow cylindrical shells between which a gap is formed; the two cover plates are fixedly connected with the axial end faces of the two sides of the hub through the screws respectively; a group of grooves is symmetrically formed in the diameter directions of inner rings of the two cover plates. The dismounting device comprises an outer protective cover, sliding fixing columns, sliding clamping pieces, a fixed platform, a rotating lifting cylindrical table, a bearing and a motor. When the screws are dismounted, the two sliding fixing columns can be clamped into the grooves in the inner rings of the two cover plates; when the cover plates are dismounted, the sliding clamping pieces can be clamped into the grooves in the inner rings of the two cover plates twice, the fixed platform and the outside are fixedly connected and kept fixed, and the bearing is driven by the motor to rotate, thereby driving the rotation and lifting of the rotating lifting cylindrical table to sequentially dismount the two cover plates.

The invention discloses a material sending module and a screen printing machine. The screen printing machine includes the material sending module, a feeding module, a main machine, a printing module and a discharging conveyor belt; the material sending module is used for conveying printing stock to the feeding module one by one; the feeding module is used for enabling the printing stock to sleevea conveying shaft of the main machine one by one to complete the feeding of the printing stock one by one; the main machine is used to drive the printing stock to move to different stations; the printing module is used to print the printing stock through a first squeegee, a second squeegee and a screen; and the discharging conveyor belt is used to conveying the printed printing stock out of the main machine to complete discharging. The screen printing machine is simple in structure, few in the usage amount of power equipment and very convenient to maintain. In addition, materials can be sent to the material sending module through an existing manipulator, a vibrating plate and the like so as to realize the full-automatic feeding, printing and discharging, manual participation are not neededin the whole process, the labor cost is greatly reduced, 24-hour uninterrupted production is realized, high competitiveness is provided for enterprises, and the market space is wide and the economicvalue is high.

The invention discloses a method for charging and discharging air as well as maintaining and controlling air pressure. The method comprises the steps of inputting the needed target air pressure value Paim into an electronic control unit (ECU) control system by an enable keyboard; subtracting the Paim and current air pressure value Pe of a target air chamber to obtain difference, and comparing the obtained difference with the air pressure dead zone value Pd; if the difference of Paim and Pe is larger than Pd, controlling an air charging electromagnetic valve to charge air by the ECU control system which generates the corresponding pulse signal according to the duty ratio; if the difference of Paim and Pe is less than Pd, controlling an air discharging electromagnetic valve to discharge air by the ECU control system according to the duty ratio; when the absolute value of the difference of the target air pressure value Paim and the current air pressure value Pe is less than the air pressure dead zone value Pd, controlling the electromagnetic valves to stop working by the ECU control system according to the duty ratio at the moment. After the method is adopted, air charging and discharging can be carried out on the closed air chamber with any form; when the air chamber with the unknown pressure value reaches the needed air pressure value after being manually adjusted, the air chamber can be switched into an automatic control mode at any time, and the current air pressure value is maintained to be constant; the method is simple in operation and high in controllable degree.

The invention relates to the technical field of geothermal energy development, in particular to a geothermal well novel technology. The technology improves the ability of leading geothermal energy inrock strata into geothermal wells through a heat conduction well cementing technology and a enhanced conductivity fracturing technology, and achieves high efficiency heat taking and heat transferringusing through spiral plate type condensing section gravity heat pipe heat exchanger. The technology comprises the following concrete process that after completing drilling a geothermal well and casinga sleeve pipe, the heat conduction well cementing is carried out, that is, thermal insulation cement slurry is injected in the low temperature section of the formation, and heat conduction cement slurry is injected into a stratum high temperature section to complete well cementing; after solidification of the heat insulation cement slurry and the heat conduction cement slurry of the well cementing, subsection perforation fracturing is carried out in the sleeve pipe of the stratum high temperature section, cracks are produced in high temperature strata, and heat conduction material is filled into the cracks to form a heat guiding belt extending from the sleeve pipe to the stratum; and finally, the condensing section of gravity heat pipe heat exchanger connected with the sleeve pipe is installed on the ground to form a high-yield geothermal well system in which rapid heat transfer in the stratum and high efficiency heat transfer in a well cylinder finally.

The invention relates to a method for preparing TiO2 film with visual light response and non-metallic element doping. The positive TiO2 nanometer particle and the polyanion electrolyte are alternatively deposited on the supports that dipped by the polymer-cation electrolyte, to cycle 0-60 times to attain the polymer electrolyte/TiO2 film, and sintered in the N2, CO2, NH3 and doping with one or several of C, N, and S of polymer. The inventive film has better visual light catalyst property, and since the self-installment in earlier stage makes the doping elements selectable, and the film thickness is controllable, the amount of TiO2 is controllable too.

The invention discloses an ultrasonic-assisted method for preparing hydrophobic silicon dioxide aerogel composite materials. The ultrasonic-assisted method includes steps of diluting water glass by the aid of water and carrying out mixed hydrolysis reaction on the water glass and acid solution to obtain solution A; adding basic catalysts into the solution A, and regulating a pH (potential of hydrogen) value of the solution A until the pH value reaches 3-5 so as to obtain solution B; adding organic solvents into the solution B, uniformly stirring the organic solvents and the solution B to obtain mixtures and then pouring the mixtures into molds with glass fiber felt to obtain wet gel fiber felt pads; aging the wet gel fiber felt pads; placing the aged wet gel fiber felt pads in containers, adding silane modifiers and acid solution into the containers, placing the containers in ultrasonic generators, carrying out ultrasonic modification and carrying out oven drying to obtain the hydrophobic silicon dioxide aerogel composite materials. The ultrasonic-assisted method for preparing the hydrophobic silicon dioxide aerogel composite materials has the advantages of simple procedure, short cycle and low cost.

The invention is concerned with one dimension CuO Nano-needle/ Cu substrate material and the application in dye solar cells. The material is produced with pulse electrolysis deposition process. Electrolysis deposit one layer of nanocrystalline Cu film on Cu substrate, put this film into heating stove to get one dimension CuO Nano-needle material under 750+/-50 DEG C for 1 to 2 hours. Take the one dimension CuO Nano-needle/ Cu substrate material as cathode material to solar cell with TCO Conducting glass/ TiO2 nanocrystalline/ dry/ CuO Nano-needle/ Cu substrate, and test its efficiency of light to electricityeta. For the work function of CuO(Phi=5.3eV) is close to Pt(Phi=5.65eV), and P type of CuO has high hole mobility (0.1cm<2>V<-1>S<-1>), so it can be used as cathode material to solar cell instead of Pt to greatly reduce the cost, for better application and spread of solar cell.

The invention discloses a preparation method of a nanosheet self-assembled three-dimensional nano flower tin sulfide/graphitized carbon nitride lithium ion battery anode material. Melamine is kept at450-650 DEG C for 2-6 hours, is naturally cooled to room temperature, is ground for prepare use, and is dispersed in ethanol to obtain a suspension, the suspension is centrifuged and washed several times with deionized water and absolute ethanol, vacuum drying is conducted to obtain a product g-C3N4, the product g-C3N4 is dissolved in the deionized water, after stirring, the product g-C3N4 is ultrasonically dispersed to form a suspension A, PVP is added to the suspension A, stirring is conducted until the product g-C3N4 is completely dissolved to form a solution B, TAA and SnCl4 2H2O are addedto the solution B, stirring is uniformly conducted to form a solution C, the solution C is subjected to a microwave hydrothermal reaction, after the reaction is completed, a precursor is obtained, the precursor is centrifuged and washed several times with the deionized water and the absolute ethanol, and vacuum drying is conducted to obtain a nanosheet self-assembled three-dimensional nano flowerSnS2/g-C3N4 battery material.

The invention relates to a reinforced-denitrification MBR (membrane bioreactor) sewage treatment method which comprises steps as follows: (1) pretreated town sewage enters an anoxic tank together with 300-400% of reflux precipitation tank sludge and 200-400% of reflux membrane tank nitrification solution, and denitrifying bacteria reduce nitrate nitrogen carried by reflux into nitrogen by using a carbon source in the sewage; (2) the effluent of the anoxic tank enters a precipitation tank to be subjected to sludge-water separation together with the refluxed membrane tank nitrification solution, part of the precipitated sludge refluxes to the anoxic tank, and the rest of sludge is discharged; and (3) the effluent of the precipitation tank enters a membrane tank to be nitrified so as to oxidize ammonia nitrogen into nitrate nitrogen, a pump extracts water from the membrane tank via the intervals of the membrane, and the effluent water is discharged or reused. The invention sufficiently combines the inherent characteristics of the MBR and MBBR (moving bed biofilm reactor) techniques, reduces the influence of the biological denitrification influencing factor, and has the characteristics of high denitrification efficiency, high denitrification stability, simple process and the like.

The invention relates to a method for the production of an anatase fusiform TiO2 nano-crystalline material. The method for the production of the fusiform anatase TiO2 nano-crystalline material is characterized in that the method includes the following steps: 1) a TiO2 powder is positioned in a sodium hydroxide solution with the molar concentration ranging from larger than 2M to smaller than 20M and is agitated strongly for thirty to fifty hours to get a suspended solution A; 2) the suspended solution A experiences the hydrothermal reaction for more than forty eight hours at a temperature of between 160 to 220 DEG C by adopting a hydrothermal method; 3) then an HCl solution with the concentration of 0.1M is added thereto for adjusting the pH value to 7.0, and a single-crystalline titan acid nano-tube material is obtained after filtration and then being dried for twelve to twenty four hours at a temperature of 80 DEG C; 4) the single-crystalline titan acid nano-tube material generated by the above reaction is mixed with distilled water to prepare a suspended solution B; 5) the suspended solution B undertakes the hydrothermal reaction for more than forty eight hours at a temperature of between 160 and 220 DEG C by adopting the hydrothermal method; and 6) the fusiform anatase TiO2 nano-crystalline material is obtained after the filtration by deionized water and then being dried for twelve to twenty four hours at a temperature of 80 DEG C. The method has advantages of simple process, high degree of controllability and low cost.

The invention provides a one-dimensional calcium phosphate nano/micron material as well as a preparation method and an application thereof. The one-dimensional calcium phosphate nano/micron material is prepared from water-soluble calcium salt and water-soluble phosphate through a microwave-assisted hydrothermal reaction. The one-dimensional calcium phosphate nano/micron material adopts a rod-likestructure, is 50 nm-500 mu m long, has the length-diameter ratio larger than 5:1, can transfer nucleic acid into cells after being mixed with nucleic acid and has good biocompatibility, high gene transfection efficiency and long duration time.

The invention discloses a method for regulating and controlling the corrosion resistance of a CoNiFe medium-entropy alloy. The improvement of the proportion of low [sigma]CSL grain boundaries and theinterruption of the connectivity of a high-energy random grain boundary network are realized by regulating and controlling the proportion of special grain boundaries (especially [sigma]3 grain boundaries) in the medium-entropy alloy through grain boundary engineering, and therefore the corrosion resistance of the CoNiFe medium-entropy alloy can be regulated and controlled. The method comprises five steps of vacuum melting, homogenizing treatment, hot forging, controlled rolling and controlled annealing. According to the prepared CoNiFe medium-entropy alloy, the proportion of low [sigma]CSL grain boundaries is more than 40%, and the proportion of [sigma]3 grain boundaries is more than 80%. Through the regulation and control effect of the method, the corrosion performance of the CoNiFe medium-entropy alloy is remarkably improved, the corrosion potential is -0.55 to -0.11 V, and the corrosion current density is 23-0.03 [mu]A/cm2.

The invention discloses a preparation method and application of hydrogen peroxide decomposed manganese oxide catalysts. The manganese oxide catalysts are any one or mixtures of several ones from delta-MnO2, alpha-MnO2, beta-MnO2, gamma-MnO2, gamma-Mn3O4 and alpha-Mn2O3. At normal temperature and normal pressure, hydrogen peroxide is decomposed through catalysts; the concentration of hydrogen peroxide is reduced to be 1ppm or below. The preparation method of the manganese oxide catalysts provided by the invention has the advantages that the method is simple and convenient; the implementation is easy; the pollution is low; the control is easy; the requirements on equipment are low; the controllable degree is high; the raw material sources are wide; the production cost is low. Meanwhile, compared with the catalyst prepared in the prior art, the prepared catalyst has high hydrogen peroxide decomposing capability, so that better practical application and promotion values are realized.