23results about How to "Increase conversion rate" patented technology

The invention relates to the technical field of hydrometallurgy, and provides a method for cleanly extracting vanadium from vanadium slag based on dolomite. According to the method, dolomite is adopted to replace a traditional calcification or sodium salt roasting auxiliary agent to co-roast the vanadium slag, and vanadium in the vanadium slag is roasted through two-step temperature control to be converted into acid-soluble calcium magnesium vanadate roasting clinker. The roasting clinker is subjected to acid leaching to obtain vanadium liquid, the vanadium liquid is subjected to deep impurity removal through a magnesium ammonium phosphate precipitation method, ammonium sulfate is added into the vanadium liquid, the pH value is adjusted, acid ammonium salt vanadium precipitation is conducted, and ammonium polyvanadate is obtained. And washing, filtering, drying and calcining the ammonium polyvanadate to obtain high-purity powder vanadium pentoxide or melting and casting to obtain high-purity tablet vanadium pentoxide. Vanadium precipitation wastewater is subjected to reduction treatment, lime neutralization and solid-liquid separation and then is reused in a leaching system, and cyclic utilization of ammonium salt and water resources is achieved. By means of the technical scheme, the problem that in the related technology, the vanadium leaching rate is low is solved.

The invention discloses a WS2 / W composite material, a preparation method thereof and application of the WS2 / W composite material in a sodium-sulfur battery. The preparation method comprises the following steps: uniformly stirring isopropanol and acetone to obtain a mixed solution A; weighing tungsten hexachloride, adding the tungsten hexachloride into the mixed solution A, and uniformly stirring to obtain a mixed solution B; transferring into a reaction kettle, sealing and putting into a drying oven for reaction; after the reaction is finished, carrying out suction filtration and washing on a product by using industrial alcohol, and drying in a vacuum oven to obtain W18O49 powder; the method comprises the following steps: weighing W18O49 powder and sublimed sulfur, respectively and correspondingly placing the W18O49 powder and sublimed sulfur in a first porcelain boat and a second porcelain boat, then placing the second porcelain boat in the first porcelain boat, placing the second porcelain boat in a tubular furnace, introducing argon into a furnace chamber of the tubular furnace, after the pressure of the furnace chamber is increased to 0.2-0.3 MPa, keeping the airtightness of the system, heating to 1100-1300 DEG C at the rate of 20 DEG C / min, keeping the pressure at 0.2-0.3 MPa in the heating process, and keeping the temperature for 2-3 hours; and after the temperature reaches 1100-1300 DEG C, continuously preserving heat for 2 hours, introducing argon, cooling to room temperature, and collecting to obtain WS2 / W powder. The problems of poor conductivity of the sulfur positive electrode, polysulfide shuttle effect and slow reaction kinetics are solved.

The invention belongs to the technical field of biochemical engineering, and particularly relates to application of a P450 enzyme mutant and engineering bacteria thereof in synthesis of calcifediol, and the mutant is obtained by mutating one or more sites in an amino acid sequence based on a wild type P450 enzyme Vdh; the amino acid sequence of the wild type P450 enzyme Vdh corresponds to the accession number of GenBank, namely CP069288.1. Through systematic molecular dynamics simulation, conservative analysis and substrate binding pocket engineering on the Vdh enzyme, a plurality of key mutation sites are successfully screened and obtained. The constructed combined mutant (such as I144R / N173M / Q310R, Vdh-M3) shows extremely high hydroxylation activity, the pure enzyme activity of the combined mutant can reach 9.8 times that of a wild type enzyme, and the conversion rate from vitamin D3 to calcifediol is greatly increased.

The application discloses a photovoltaic energy-saving curtain wall based on a renewable energy system and belongs to the technical field of photovoltaic energy-saving curtain walls, which comprises a longitudinal beam assembly installed on a building outer wall, a cross beam assembly vertically installed on the longitudinal beam assembly, and a positioning frame sealingly installed between the longitudinal beam assembly and the cross beam assembly; a folding photovoltaic power generation module is used to convert renewable solar energy into electric energy; the folding photovoltaic power generation module comprises a fixed strip plate fixedly installed in the center of the positioning frame, two groups of movable strip plates symmetrically installed in the positioning frame relative to the fixed strip plate, and two groups of photovoltaic plates arranged between the movable strip plates and the positioning frame and rotationally connected with each other; the photovoltaic energy-saving curtain wall can control the rotation and folding of the multiple groups of photovoltaic plates according to the needs of building ventilation, illumination and light energy conversion, and can synchronously drive the longitudinal movement of a cleaning flow guide module during the operation process, so that the surface of the photovoltaic plate can be automatically cleaned.

The application provides a folded cascode amplifier, an integrated circuit, a chip and an electronic device. The folded cascode amplifier comprises a bias circuit configured to provide a bias current according to a bias voltage, a first input differential unit and a second input differential unit arranged symmetrically, a folded cascode unit, and a fifth group of current mirrors connected to the folded cascode unit. The folded cascode unit comprises a first group of cascode tubes and a second group of cascode tubes, and a first group of current mirrors to a fourth group of current mirrors. The first group of cascode tubes comprises a first output transistor and a first load current tube connected in series, the second group of cascode tubes comprises a second output transistor and a second load current tube connected in series, and the first group of current mirrors multiplexes the first load current tube, and the fourth group of current mirrors multiplexes the second load current tube. The folded cascode amplifier improves the transconductance, the slew rate, the conversion rate and the gain-bandwidth product through the proportional cooperation of the several groups of current mirrors.

The utility model provides a kind of gasifier and sterilization cabinet system, the gasifier includes liquid storage bottle, first flow pump, first water tank, first heating device, vaporization pipe, second water tank, second heating device, second flow pump, heating pipe, circulating inlet water pipe and circulating backwater pipe, first heating device and second heating device are heated respectively to first water tank and second water tank, vaporization pipe first end is arranged in first water tank and is communicated with liquid storage bottle by liquid outlet pipe, and the second end of vaporization pipe is provided with use connecting end, heating pipe is sleeved between the both ends of vaporization pipe, and heating passage is formed between vaporization pipe and heating pipe, and the both ends of heating passage are communicated with second water tank by circulating inlet water pipe and circulating backwater pipe respectively, and first flow pump and second flow pump are connected on liquid outlet pipe and circulating inlet water pipe respectively;The sterilization cabinet system includes sterilization cabinet and gasifier.The utility model can avoid that gas after vaporization is condensed into liquid and improve liquid gas conversion rate.

This invention discloses a copper-based metal-organic framework composite photoelectrochemical Fenton catalytic membrane, its preparation method, and its application, belonging to the field of photoelectrochemical Fenton composite catalytic membrane and water treatment technology. The catalytic membrane consists of an acidified carbon nanotube (ACCNTs) substrate and a copper-based MOF (CuBTC)@graphite-phase carbon nitride (CN) composite catalytic layer supported on its surface. First, carbon nanotubes (CNTs) are acidified with mixed acid to obtain ACCNTs, and an ACCNTs substrate membrane is prepared by vacuum filtration. Subsequently, a CuBTC@CN catalytic layer is further loaded onto the surface of the ACCNTs substrate membrane using vacuum filtration. The ACCNTs substrate enhances the electron transport rate and promotes hydrogen peroxide generation; the heterojunction formed by CuBTC and CN significantly inhibits photogenerated carrier recombination and broadens the visible light response range. The resulting copper-based metal-organic framework composite photoelectrochemical Fenton catalytic membrane can achieve simultaneous filtration and catalytic degradation in continuous flow mode, exhibiting good removal efficiency for organic wastewater.

A method for preparing di-(2-hydroxyisopropyl)benzene, a key intermediate of hydroquinone. The method comprises the following steps: (1) reacting diisopropylbenzene and an oxygen-containing gas in the presence of an alkali and an initiator to obtain a liquid containing solid di-(2-hydroxyisopropyl)benzene; (2) separating and purifying the solid di-(2-hydroxyisopropyl)benzene to obtain a di-(2-hydroxyisopropyl)benzene product with a content >99.95%, wherein the initiator includes one or more of azobisisobutyronitrile, diisopropylbenzene dipperoxide, and diisopropylbenzene peroxide, and the alkali includes sodium hydroxide, potassium hydroxide, or a combination thereof, and the oxidation reaction in step (1) is carried out at a temperature of 80-150°C and a pressure of 0.3-1.8 MPa.

The present application relates to the field of biological transformation of mogroside, and discloses a method for efficiently biotransforming mogroside V to prepare mogroside III E. A kind of plant endophytic fungus is used to biotransform mogroside V to obtain mogroside III E. The method is simple in operation, and the product has high conversion yield, so it can be used for large-scale preparation of mogroside III E. The method is simple, efficient, safe, green and low in cost, and provides a new method for industrial production, food production and new drug preparation.

This utility model relates to a rotary kiln lining structure; each ring of the inner lining layer is provided with at least four evenly distributed lifting bricks, the inner surface of which protrudes from the inner surface of the microporous energy-saving inner lining brick. The lifting bricks on each ring of the inner lining layer are positioned one brick in the direction of rotary kiln operation, and form a corrugated spiral protrusion structure for tipping, lifting, and pushing materials. This improves the heat energy conversion rate, thereby improving the quality stability of the rotary kiln, increasing output, saving energy and reducing consumption, and achieving significant environmental protection effects, ultimately achieving the goal of a low-carbon economy.

This application discloses a DAB converter and its driving control method. The method includes: obtaining the voltage transfer ratio based on the input voltage and output voltage of the DAB converter; obtaining the feedforward power based on the input voltage, voltage transfer ratio, and output current of the DAB converter; obtaining the primary-to-secondary side shift ratio based on the input voltage, output voltage, voltage transfer ratio, input current, and feedforward power of the DAB converter; obtaining the primary-side inward shift ratio and the secondary-side inward shift ratio based on the voltage transfer ratio, feedforward power, and the primary-to-secondary side shift ratio; and driving the DAB converter based on the primary-side inward shift ratio, the secondary-side inward shift ratio, and the primary-to-secondary side shift ratio. This invention optimizes the values ​​of the primary-side inward shift ratio, the secondary-side inward shift ratio, and the primary-to-secondary side shift ratio using relevant parameters of the DAB converter to achieve precise driving control of the DAB converter. By adjusting the control parameters of the DAB converter, the soft-switching range can be expanded, current stress reduced, and light-load efficiency improved, while significantly increasing the system's energy conversion rate.

The invention relates to a system and a method for continuously synthesizing alkoxy aluminum by using a slurry bed reactor, and the method has the main technical characteristics that metal aluminum powder and C3-C14 alcohol are fully mixed to form mixed slurry of aluminum and organic alcohol, the mixed slurry reacts in the reactor, the reaction process is optimized, and the alkoxy aluminum is continuously synthesized. The reaction is initiated by utilizing the self-catalysis effect of alkoxy aluminum, and an exogenous catalyst does not need to be introduced. Compared with the prior art, the added metal aluminum powder can be subjected to autocatalytic reaction, so that the reaction rate is effectively increased; an alcohol injection supply assembly is introduced to the bottom, reactants are supplemented, and meanwhile impact flow is formed on the lower portion of a screen, so that aluminum on the screen is layered and vibrates continuously, powder is prevented from being accumulated to block meshes, meanwhile, the suspension state of the powder can be maintained, and metal aluminum can react completely; a heat recovery system is also arranged at the top of the reaction, so that hydrogen and alcohol generated in the reaction process are mixed neatly and can be cooled, and explosion boiling of the reactor is avoided.

The application provides a hybrid structure analog-to-digital converter, belonging to the technical field of integrated circuit design, comprising a 7 bit first-order feed-forward incremental delta sigma ADC and an 8 bit single-stage cyclic ADC. The incremental delta sigma ADC adopts a first-order feed-forward structure, so that an input signal is directly fed to a comparator input end for comparison without passing through a modulator loop, thereby reducing the influence of non-ideal factors in the modulator loop on the input signal. In addition, the input end of the comparator is reset to a common mode level when the comparator is not working, so as to eliminate the influence of inconsistent voltage changes of two input ends of the comparator caused by incomplete matching of a layout wiring of the comparator input end on the circuit, and improve the overall signal-to-noise ratio of the circuit. By using the hybrid structure analog-to-digital converter provided by the application, the signal-to-noise ratio and the conversion speed are improved, and the conversion time is reduced without adding additional circuits.

This invention discloses a carbon dioxide sequestration method and sequestration system. The sequestration method includes the following steps: (1) injecting an aqueous solution of 1,3-dioxolane into a target geological area; (2) injecting the gas to be sequestrated into the target geological area, generating carbon dioxide hydrate through a reaction. The sequestration system includes a monitoring unit, a delivery unit, and a hydration reaction unit; the delivery unit and the hydration reaction unit are connected; the delivery unit includes a horizontal injection well and a horizontal gas injection well; the monitoring unit includes a horizontal monitoring well. The carbon dioxide sequestration method and sequestration system provided by this invention utilize the thermodynamic and kinetic dual promoter 1,3-dioxolane to achieve carbon dioxide sequestration in large-scale scenarios, realizing efficient, rapid, and environmentally friendly CO2 geological sequestration.

The invention belongs to the technical field of preparation of perfluorinated sulfonic acid resin, and particularly relates to a bipolar membrane electrodialysis device for preparing a perfluorinated sulfonic acid resin solution and a preparation method. The device comprises an electrolytic bath, an anode plate arranged at one end of the electrolytic bath, a cathode plate arranged at the other end of the electrolytic bath, and an anode chamber, a bipolar membrane assembly and a cathode chamber which are arranged between the anode plate and the cathode plate, wherein the anode chamber and the cathode chamber are connected in series; the bipolar membrane assembly comprises a bipolar membrane, an acid chamber, a cation exchange membrane and an alkali chamber. According to the preparation method of the perfluorosulfonic acid resin solution, the bipolar membrane electrodialysis device is used for transformation preparation of the perfluorosulfonic acid resin solution for the first time, a bipolar membrane is used for directly dissociating water to generate H < + > and OH, the perfluorosulfonic acid resin solution is transformed into the perfluorosulfonic acid resin solution through a one-step method, and compared with a traditional method, the preparation method has the advantages that the cost is low, and the efficiency is high. According to the method disclosed by the invention, the transformation rate and the yield are greatly improved, the time cost and the labor cost are greatly saved, and pollutant-free emission can be realized.

The present application relates to the technical field of carbon dioxide emission reduction, and relates to an electrochemical enhanced evaporation crystallization closed-loop carbon dioxide recovery method and device. A low electric field is applied to an electrochemical absorption unit containing alkali absorption liquid, so that carbon dioxide is accelerated to convert into carbonate or bicarbonate in potassium hydroxide / potassium carbonate solution. Subsequently, the carbonate-rich solution is introduced into an evaporation-interface crystallization unit composed of hydrophilic fibers, industrial waste gas waste heat is used to drive interface evaporation, and efficient crystallization of potassium carbonate is realized in the designated area of the fibers. The aqueous solution of solid potassium carbonate and / or the uncrystallized mother liquor is sent into an electrochemical regeneration unit, potassium hydroxide is regenerated by electrochemical method, and high-purity carbon dioxide is released, so that the closed-loop process of absorption-crystallization-regeneration is realized. The present application has the advantages of low regeneration energy consumption, avoidance of high-temperature calcination, efficient and controllable crystallization, and modulization and amplification, and is suitable for carbon dioxide-containing waste gas emission reduction and resource utilization in the steel, chemical, power and other industries.

The invention provides a method for preparing olefin through photo-catalytic oxidative dehydrogenation of alkane, and belongs to the technical field of photo-catalytic preparation of olefin. The method for preparing olefin through photo-catalytic oxidative dehydrogenation of alkane comprises the following steps: by taking a xenon lamp as a light source, introducing mixed gas containing alkane into a photo-catalytic reactor loaded with a photocatalyst, under the illumination condition, alkane in the mixed gas is subjected to oxidative dehydrogenation to obtain olefin; wherein the photocatalyst comprises a TiO2 {001} carrier and a bimetallic alloy loaded on the TiO2 {001} carrier, the bimetallic alloy is an alloy formed by Pd and other metals, and the other metals are selected from any one of Fe, Ni, Cu, Zn, Pt, Ag and Au; wherein the mixed gas further comprises oxygen and inert gas, the alkane is ethane or propane, and the olefin is ethylene or propylene.

The invention relates to a double-path time domain interleaving return-to-zero system applied to a digital-to-analog converter, which is characterized in that in a time domain interleaving parallel processing stage, a high-speed data stream is decomposed into four paths of low-rate parallel signals to be processed, so that the working frequency and the time sequence design difficulty of a rear-end digital logic circuit are remarkably reduced, and the reliability of the digital-to-analog converter is improved. The limitation of a digital system on the overall conversion rate of the digital-to-analog converter is effectively broken through; in a signal synthesis stage, a zero returning technology is introduced through a multiplexer unit, and four paths of low-rate parallel signals are combined into a double-path time domain interleaving zero returning signal, so that intersymbol interference caused by incomplete establishment of a switch transient process and a current source is inhibited, transient error energy introduced in a switch switching process is pushed to a high-frequency region, and the signal quality is improved. The spurious-free dynamic range of the digital-to-analog converter in the Nyquist range is expanded; according to the invention, the double-time-domain interleaving return-to-zero signal is designed to reserve wide time for the full establishment of the output signal, and the integrity and high linearity of the output signal are ensured while the dynamic error is effectively eliminated.

The present invention aims to provide a method for preparing a modified Ni / CeO2 catalyst and its application, belonging to the field of CO2 methanation catalyst technology. This invention uses ammonia solutions in different solvents as precipitants, adding the precipitants dropwise to a cerium salt solution and stirring to obtain a flocculent mixture. After filtration, washing, drying, and calcination, a CeO2 support modified with ammonia solutions in different solvents is obtained. The modified Ni / CeO2 catalyst precursor is prepared using a volumetric impregnation method. By modifying the CeO2 support with ammonia solutions in different solvents, the synthesized Ni / CeO2 catalyst precursor is treated with a reducing atmosphere, and the aggregation of Ni nanoparticles is effectively suppressed by optimizing the Ni-CeO2 interaction structure. The Ni / CeO2 catalyst prepared by this invention using ammonia solutions with water as the solvent exhibits excellent low-temperature methanation activity, with a CH4 selectivity approaching 100%, and stable catalytic performance.

The application relates to the technical field of barium element utilization in barite minerals, and specifically discloses a method for improving the utilization efficiency of barium elements in barite minerals. The method comprises the following steps: mixing crushed barite and crushed coal in a weight ratio of 1:(0.2-0.25), and then extruding and balling to obtain pellets, wherein the particle size of the pellets is 20-80 mm; the pellets are subjected to microwave roasting and crushing, the crushing product is subjected to water leaching to obtain a barium sulfide solution, and the barium residue is subjected to acid liquid dissolution and leaching, and then subjected to solid-liquid separation to obtain a barium ion solution and a residue stone. The method can significantly improve the yield of water-soluble BaS and the comprehensive utilization rate of barium elements in barite, and the process is environmentally friendly, low in pollution and high in production efficiency.

The utility model relates to the technical field of solar cells, in particular to a packaging structure which comprises a first packaging structure layer, the first packaging structure layer is provided with a plurality of through holes, and the through holes can penetrate through the upper surface and the lower surface of the first packaging structure layer. The utility model further provides a multi-layer composite solar cell panel module which is provided with a first packaging structure layer. Compared with the prior art, the stress distribution of the first packaging structure layer can be changed through the through holes, so that the stress is redistributed around the through holes, the phenomenon of stress concentration is relieved, more uniform deformation of the first packaging structure layer during bending is facilitated, local overhigh stress of the first packaging structure layer is reduced, and the reliability of the packaging structure layer is improved. Therefore, the first packaging structure layer is ensured not to be cracked or fractured due to overlarge stress in the bending process, and the condition that all layers of the solar cell panel module are not cracked or layered is ensured, so that the cell can obtain a good sealing protection effect, the use reliability of the solar cell module is improved, and the service life of the solar cell module is prolonged.

A transmitter circuit (1) that receives parallel signals (D(1:4)) and outputs a serial signal (D_Tx) in response to the parallel signals may include; a clock generator (20) generating first clock signals (CK(1:4)) having different respective phases, a multiplexer (10) including selection circuits (11, 12, 13, 14) respectively configured to selectively provide at least two of the parallel signals (D1, D2 or D2, d3 or D3, D4 or D4, D1) to an output node in response to at least two of the first clock signals (Ck1, Ck2 or Ck2, Ck3 or Ck3, Ck4 or Ck4, Ck1), and an output driver (15) generating the serial signal (D_Tx) by amplifying a signal at the output node.

The utility model discloses a hydraulic oil pump body of an automobile driving system, which belongs to the technical field of automobile engineering and comprises a pump body mechanism, a transmission mechanism is movably mounted in the middle of the inner end of the pump body mechanism, and a filtering mechanism is fixedly mounted on the front side of the inner end of the pump body mechanism. The filtering mechanism comprises an oil inlet pipeline, a filtering layer is fixedly installed on the front side of the inner end of the oil inlet pipeline, a filter element is arranged at the bottom of the inner end of the filtering layer, an adsorption layer is fixedly installed at the position, located at the inner end of the oil inlet pipeline, of the tail end of the filtering layer, and a magnetic suction net is arranged in the middle of the inner end of the adsorption layer; according to the hydraulic oil pump body of the automobile driving system, by arranging the magnetic attraction net, tiny scrap iron generated by daily mechanical friction in the device is absorbed, the purity of hydraulic oil is improved, the energy conversion rate of the device is increased, meanwhile, abrasion of the tiny scrap iron to parts in the device during use can be reduced, and the transmission rate and durability of the device are improved.