33results about How to "Improved mass transfer properties" patented technology

The invention relates to a metal gas diffusion layer used for a fuel cell and a preparation method thereof. The preparation method comprises the following steps: preparing a stainless steel short fiber sintering felt by adopting a vacuum high temperature sintering method, then sequentially preparing a chromium layer and a graphite layer on the pretreated stainless steel short fiber sintering feltby adopting a closed field unbalanced magnetron sputtering ion plating technology, and then carrying out hydrophobic processing on the entire of the coated stainless steel short fiber sintering felt by utilizing polytetrafluoroethylene; and finally coating powdered carbon on the surface by adopting an ultrasonic oscillation method to obtain the metal gas diffusion layer used for the fuel cell. Inthe invention, stainless steel fiber with low price is taken as raw material, the high temperature vacuum sintering method is adopted to prepare the sintering felt, and the magnetron sputtering ion plating technology is utilized to prepare a carbon coating so as to improve the contact performance and anti-corrosion performance of the metal gas diffusion layer, thus the high-performance gas diffusion layer used for the fuel cell is prepared with low cost.

A technology for synchronously removing N and P from the city sewage features that the composite suspended living things system with active sludge and biomembrane is created in a batch of composite bioreactors, which in running by the sequence of anaerobic, aerobic and anoxic steps. Its advantages are short reaction flow, less consumption of carbon source, high effect and low cost.

The invention discloses a method to extract chromocor from duck bran, which comprises the following steeps: a, sorting duck kernel; removing impurity; grinding; sieving; separating out bran; b, controlling water in bran between 10% and 16%; entering into squeezing and swelling device; treating; getting puffy porous granular material; c, defatting the bran material; d, extracting several times with alcohol dissolvent; separating; merging filter liquor; e, condensing the filter liquor; cooling; aging; proceeding chromocor evolution; separating; washing; drying; getting the extract.

The invention discloses a kind of catalyst distillation module and uses this module the catalyst distillation method.The invention catalyst distillation module includes the granules of catalyst, the silk screen vessel and the filler plate, its characteristic lies in, in the stated silk screen vessel which is used to load and fill granules of catalyst one by one or interval lays to the stated free channel which is formed by fold put the filler plate;Among them the stated filler plate is the corrugated sheet padding,open arbitrary shape holes on the corrugated sheet trough,remove the open hole part on the stated corrugated sheet, or divides the hole opened part into two parts along the ripple direction, then move upward or downward the formed two teeth pieces.The invention module has the force fluid redistribute ability, overcame the flaw that channel and so on cause the mass transfer effect droppes ; Lengthenes the fluid mobile way, increases the hold liquid volume of the reaction zone liquid.

The invention discloses a three-dimensional fuel cell catalyst layer electrode and a preparation method thereof. The fuel cell catalyst layer electrode is formed by processing of a catalyst material,a filler material, an ion conductor solution and a solvent; the catalyst material is a carbon-supported platinum catalyst or a carbon-supported platinum alloy catalyst; the filler material is one or amixture of at least two of a multiwalled carbon nanotube, VGCF-X and VGCF-H; the ion conductor solution is a perfluorinated sulfonic acid ionomer resin solution; and the solvent is one or a mixture of at least two of ethyl alcohol, isopropyl alcohol and normal propyl alcohol. According to the invention, three-dimensional filler material is added to a conventional catalyst layer slurry, such as acarbon nanotube or a carbon nanofiber material, and by mixing the filler material with a carbon-supported catalyst, a three-dimensional space is formed in the catalyst layer, so as to reduce the masstransfer resistance in the electrode, improve the mass transfer characteristic of the catalyst layer in a high current density, and further greatly improve the output performance and the stability ofthe fuel cell electrode.

Catalysts are disclosed comprising fibrous substrates having silica-containing fibers with diameters generally from about 1 to about 50 microns, which act effectively as “micro cylinders.” Such catalysts can dramatically improve physical surface area, for example per unit length of a reactor or reaction zone. At least a portion of the silica, originally present in the silica-containing fibers of a fibrous material used to form the fibrous substrate, is converted to a zeolite (e.g., having a SiO2 / Al2O3 ratio of at least about 150) that remains deposited on these fibers. The fibrous substrates possess important properties, for example in terms of acidity, which are useful in hydroprocessing (e.g., hydrotreating or hydrocracking) applications.

The invention relates to a method for synthesizing polyether glycol in a microstructure reactor, which comprises the following steps: respectively pumping oxyalkylene and a catalyst liquid generated by reacting an alkaline catalyst and an initiator into the microstructure reactor composed of a micro-mixer and a retention time prolonging pipe, reacting while controlling the reaction temperature and pressure, neutralizing the reaction solution, adsorbing, degassing and filtering to obtain the refined polyether glycol. The hydroxyl value of the refined polyether glycol is 50-550 mgKOH / g, and the relative molecular mass is 300-3300 g / mol. The method overcomes the defects of long initiation time and low operational efficiency in the intermitted technique, solves the problems of complex equipment, high requirements for technological condition control and long retention time in the continuous technique, implements quick and continuous production, and has the advantages of short reaction time, simple technique, high safety, high controllability, high adjustment flexibility, continuous operation and the like.

The invention relates to a catalyzing distillation component and a method. The component includes catalyst particles, silk network container and regulated fillers, its character lies in: the catalyst particles and other inertial particles are blended together and filled into the container, and the mentioned silk network containers are arranged in the regulated fillers one by one. The invention favors the transition of media to liquid phase in the gas phase reaction. It can make the reacting bed with large gap rate, and the catalyst is distributed in the whole reaction segment evenly.

The invention discloses a technological method for municipal wastewater nitrogen and phosphorus removal. In the method, municipal wastewater is put into a bioreactor placed by a load microorganism magnetism seed and / or a magnetic zoogloea so as to carry out biological reaction treatment, obtained mixture liquid is sent into a magnetic separator so as to carry out first separation, coagulant is put into liquid after being separated so as to carry out reaction and enters rare earth magnetic disc separation equipment so as to carry out secondary separation, magnetic and active mud formed after separation refluxes into the bioreactor, and outlet water is drained as standard drainage water. Because a technology of combining biological reaction with drug adding magnetic separation is adopted, the invention has the advantages of low investment and running cost compared with a membrane bioreactor, high separation efficiency, low energy consumption, favorable effects of nitrogen and phosphorus removal, SS, COD and BOD and small occupied area and is particularly suitable for treating the municipal wastewater with large flow and high concentration and revamping the traditional municipal wastewater processing plant with capacity expansion.

A process for extracting the buckwheat protein from the buckwheat bran includes such steps as controlling the content of water in buckwheat, extruding for puffing, extracting in the aqueous solution of NaOH, recovering supernatant, regulating pH value until its isoelectric point of protein, educing out protein, removing filtrate, drying and pulverizing.

The invention relates to a method for efficiently extracting flavone from ginkgo leaves and converting flavone into aglycon flavone. Ginkgo leaves are washed clean and ground, the ginkgo leaves are mixed with water, loaded into a fermentation tank and sterilized under 121 DEG C, and steam explosion is then carried out; aspergillus niger is then added for fermentation; mixed enzyme solution is then added, the added amount is 2 to 5 percent of reaction substrate, and the time of reaction under the condition of 25 DEG C to 30 DEG C is 3 to 6 hours; Beta-glucosidase is then added, the added amount is 1 percent of the reaction substrate, the reaction condition is that pH is 4.3 under the condition of 42 DEG C, and the reaction time is 5 hours; 1 percent of protease is then added, and the time of reaction under the condition of 25 DEG C to 30 DEG C is 3 to 4 hours; temperature is increased to 95 DEG C for 10 minutes, extractant is then added to extract flavone, 12000g centrifuging is carried out for 20 minutes, supernatant is extracted and concentrated, ethanol is then adopted for extraction, so that ethanol eluent is obtained, the ethanol eluent is concentrated, freeze-drying is adopted, and thereby the product is obtained.

The invention discloses a production technology for preparing methanol by continuous oxidation of methane, comprising the following steps: methane gas and solvent dissolved with catalyst are respectively preheated to the reaction temperature of 160-220 DEG C and are added into a packed bubbling tower from the entrance of the bottom of the packed bubbling tower, and the two flow upward and pass through the packed bubbling tower, and the retention time is 10-40min; the reaction pressure is 1-6MPa, liquid phase product of methyl hydrogen sulphate is generated by reaction, and methanol is obtained by rectification and hydrolysis; and the reacted tail gas is discharged from the exit of the top of the packed bubbling tower. The invention has the advantages of simple technology, low running cost, selection of suitable reactor and capability of continuous production, belonging to the field of methanol production.

The invention relates to a metal gas diffusion layer used for a fuel cell and a preparation method thereof. The preparation method comprises the following steps: preparing a stainless steel short fiber sintering felt by adopting a vacuum high temperature sintering method, then sequentially preparing a chromium layer and a graphite layer on the pretreated stainless steel short fiber sintering feltby adopting a closed field unbalanced magnetron sputtering ion plating technology, and then carrying out hydrophobic processing on the entire of the coated stainless steel short fiber sintering felt by utilizing polytetrafluoroethylene; and finally coating powdered carbon on the surface by adopting an ultrasonic oscillation method to obtain the metal gas diffusion layer used for the fuel cell. Inthe invention, stainless steel fiber with low price is taken as raw material, the high temperature vacuum sintering method is adopted to prepare the sintering felt, and the magnetron sputtering ion plating technology is utilized to prepare a carbon coating so as to improve the contact performance and anti-corrosion performance of the metal gas diffusion layer, thus the high-performance gas diffusion layer used for the fuel cell is prepared with low cost.

The invention discloses a method for in-situ synthesis of a nano Zn / Al-ZSM-5 molecular sieve with a steam-assisted dry glue conversion method. The invention belongs to the field of preparation of zeolite molecular sieve catalysts and aims to solve the problems that a conventional method for synthesizing a nano Zn / Al-ZSM-5 molecular sieve is long in crystallization time, large in energy consumption, large in molecular sieve crystal granule size and large in product waste liquid amount. The method comprises the following steps: I, weighing raw materials; II, mixing aluminum isopropoxide, a tetrapropylammonium hydroxide solution, tetraethoxysilane, zinc nitrate hexahydrate and deionized water, and carrying out vacuum drying so as to obtain a dry glue; and III, grinding the dry glue, putting the dry glue into a vessel at the upper part of a crystallization kettle, supporting the vessel by using a bracket, feeding deionized water into the bottom of the crystallization kettle, and carrying out crystallization at 160-190 DEG C, so as to obtain the nano Zn / Al-ZSM-5 molecular sieve. By adopting the method disclosed by the invention, the problem that a product is hard to separate from a mother liquid in the hydrothermal crystallization process is effectively avoided, the yield of the molecular sieve can be greatly increased, and a waste liquid with organic matters and alkalis are not generated after crystallization.

The invention relates to a catalyzing distillation component and a method. The component includes catalyst particles, silk network container and regulated fillers, its character lies in: the catalyst particles and other inertial particles are blended together and filled into the container, and the mentioned silk network containers are arranged in the regulated fillers one by one. The invention favors the transition of media to liquid phase in the gas phase reaction. It can make the reacting bed with large gap rate, and the catalyst is distributed in the whole reaction segment evenly.

The invention relates to the technical field of catalytic burning, in particular to a pulsation wire mesh catalytic burning device and method. The device comprises a sound decoupling chamber (1) and a Rijke pipe (3) and further comprises a wire mesh catalytic bed layer (2) arranged in a Rijke type pulsation wire mesh catalytic burner main body. Compared with the prior art, the device and method has the advantages of being high in catalytic burning efficiency, less in pollutant discharge, simple and compact in structure and less in investment, reducing resistance, reducing boundary layer flowing resistance due to the fact that air flow is in the pulsation state and reducing air flow resistance correspondingly when the air flow passes through the wire mesh catalytic bed layer. The device and method can be used for purifying volatile organic contaminant (VOCs) discharged by a fixed source and can also be used for high-efficiency utilization of low heating value combustible rich-hydrogen gas like blast furnace gas and contaminant emission reduction.

The invention discloses a pulsating fluidized bed combustion apparatus. It includes: acoustic decoupling chamber. Reike tube type pulsating fluidized bed combustion chamber main body is connected with acoustic decoupling chamber; airing plate is set at L / 12-3L / 4 position of the pulsating fluidized bed combustion chamber. L is the length of the combustion chamber main tube. Heating device is installed at the outer side of main body wall of pulsating fluidized bed combustion chamber. The heat exchanging surface is set at the inner or outer wall of the upper of the pulsating fluidized bed combustion chamber main body. The feeding device is installed at the side wall of the pulsating fluidized bed combustion chamber main body between heat exchanging surface and heating apparatus. The invention combines the pulsating combustion technique with fluidized bed combustion technique. It's a novel combustion conception.

The present invention relates to the field of Chinese traditional medicine abstraction, in particular to a method for abstracting flavone from capillary wormwood. The method is used for solving the problems of low extraction yield, high temperature, inactivation of extraction, residue of organic solvent, etc., existing in the prior flavone extracting method. The method comprises edulcoration, screen and dryness of capillary wormwood; extractant is put into a capillary wormwood; then lixiviation and pump filter are performed so that raw extracting solution is obtained. The extractant is obtained by mixing cellulolytic enzyme and pectinase; rarefied flavone extracting solution is obtained after absolute ethyl alcohol is put into the flavone extracting solution subject to vacuum concentration. Then the ethanol is subject to cryoconcentration and reclamation and the concentrated solution is dried at the same time. Powdered flavone extraction is obtained. Low extraction temperature in the present invention decreases solvency of impurity. The extraction is high in purity and the extraction yield is good; the obtained capillary wormwood flavone is pure natural product. Freeze drying prevents effective ingredient of the flavone from being destroyed; the biological activity is high; the end product has no organic solvent residue; the method is simple in technological operation, good in repetitiveness, and high in productive rate. Therefore the method is suitable for industrialized production.

The embodiment of the invention provides a water treatment composite electrode based on a metal-based fiber material. The water treatment composite electrode comprises a metal fiber matrix, a micro-nano configuration metal surface layer, a metal oxide catalyst layer and a surface modification layer, wherein the micro-nano configuration metal surface layer is a metal surface layer which grows on the metal fiber matrix and has a micro-nano morphology of a micro column, a micro wire, a micro rod, a nano rod or a nano wire array; the metal oxide catalyst layer is a metal oxide array which grows in situ on the micro-nano-configuration metal surface layer and has a nanowire, nanorod or nano-cone appearance; and the surface modification layer is a super-hydrophobic coating or a conductive coating loaded on the metal oxide catalyst layer. According to the invention, surface-to-body ratio is high, the surface area is high, the effective area under a unit mass electrode (the specific electrode mass active area) is large; due to the special micro-nano interface characteristic and the open structure of the fiber electrode, the water treatment electrode is suitable for different water treatment scenes, and meanwhile, the water treatment electrode has the advantages of being high in oxidation capacity, excellent in mass transfer performance, long in service life, easy to machine and low in energy consumption.

The invention provides a method for synthesizing a multi-stage porous SAPO-41 molecular sieve nanosheet, relates to a synthesis method of a SAPO-41 molecular sieve, and aims to solve the problems of large grain size and poor mass transfer capacity of a microporous SAPO-41 molecular sieve synthesized by an existing method. The synthesis method comprises the steps: 1, weighing 1 part of pseudo-boehmite, 1.4-1.8 parts of phosphoric acid with the mass concentration of 85%, 1.7-2.1 parts of di-n-butylamine, 0.7-1.1 parts of silica sol, 0.4-1.8 parts of a crystal growth inhibitor and 5.7-6.1 parts of deionized water as raw materials by weight; 2, uniformly stirring the raw materials under the stirring condition to obtain initial gel; 3, making the initial gel subjected to a crystallizing reaction under 175-195 DEG C, and then executing calcination treatment to obtain the molecular sieve nanosheet product. According to the method, the crystal growth inhibitor is added in the synthesis process, so that the multi-stage porous SAPO-41 molecular sieve nanosheet with micropores and intergranular mesopores is synthesized in situ.

Catalysts are disclosed comprising fibrous substrates having silica-containing fibers with diameters generally from about 1 to about 50 microns, which act effectively as “micro cylinders.” Such catalysts can dramatically improve physical surface area, for example per unit length of a reactor or reaction zone. At least a portion of the silica, originally present in the silica-containing fibers of a fibrous material used to form the fibrous substrate, is converted to a zeolite (e.g., having a SiO2 / Al2O3 ratio of at least about 150) that remains deposited on these fibers. The fibrous substrates possess important properties, for example in terms of acidity, which are useful in hydroprocessing (e.g., hydrotreating or hydrocracking) applications.

The invention relates to a method for synthesizing polyether glycol in a microstructure reactor, which comprises the following steps: respectively pumping oxyalkylene and a catalyst liquid generated by reacting an alkaline catalyst and an initiator into the microstructure reactor composed of a micro-mixer and a retention time prolonging pipe, reacting while controlling the reaction temperature and pressure, neutralizing the reaction solution, adsorbing, degassing and filtering to obtain the refined polyether glycol. The hydroxyl value of the refined polyether glycol is 50-550 mgKOH / g, and the relative molecular mass is 300-3300 g / mol. The method overcomes the defects of long initiation time and low operational efficiency in the intermitted technique, solves the problems of complex equipment, high requirements for technological condition control and long retention time in the continuous technique, implements quick and continuous production, and has the advantages of short reaction time, simple technique, high safety, high controllability, high adjustment flexibility, continuous operation and the like.

The invention relates to a culturing recycled-water treatment system. The system comprises a combined precipitation facility, a three-phase internally circulating fluidized bed and an ozone purification device, wherein the inside of the combined precipitation facility is separated into three cavities by a first internal separator and a second internal separator; the front cavity is communicated with a culture pond by virtue of a connecting pipeline, a movable vertical pipe is inserted to the upper end of the connecting pipeline, the lower end of the connecting pipeline is connected with a plug, and the plug is subjected to first-step precipitation; culturing water spilled from the upper end of the movable vertical pipe is freely settled in the front cavity, and the front cavity is subjected to second-step precipitation; the bottom of the front cavity is communicated with the intermediate cavity by virtue of a water distribution pipe, the intermediate cavity is separated into an upper filter material layer and a lower water distribution structure layer, and the intermediate cavity is subjected to third-step precipitation; the rear cavity is subjected to primary water lifting by virtue of a submersible pump, and the water respectively enters the three-phase internally circulating fluidized bed and the ozone purification device; a draft tube is arranged in the three-phase internally circulating fluidized bed, and an air distribution uniform pipeline component is arranged under the draft tube; a cylindrical tank body is filled with a filter material; pure water drained from the liquid outlet flows back to the culture pond; and the pure water drained from the ozone purification device flows back to the culture pond.

The present invention relates to the field of Chinese traditional medicine abstraction, in particular to a method for abstracting flavone from capillary wormwood. The method is used for solving the problems of low extraction yield, high temperature, inactivation of extraction, residue of organic solvent, etc., existing in the prior flavone extracting method. The method comprises edulcoration, screen and dryness of capillary wormwood; extractant is put into a capillary wormwood; then lixiviation and pump filter are performed so that raw extracting solution is obtained. The extractant is obtained by mixing cellulolytic enzyme and pectinase; rarefied flavone extracting solution is obtained after absolute ethyl alcohol is put into the flavone extracting solution subject to vacuum concentration. Then the ethanol is subject to cryoconcentration and reclamation and the concentrated solution is dried at the same time. Powdered flavone extraction is obtained. Low extraction temperature in the present invention decreases solvency of impurity. The extraction is high in purity and the extraction yield is good; the obtained capillary wormwood flavone is pure natural product. Freeze drying prevents effective ingredient of the flavone from being destroyed; the biological activity is high; the end product has no organic solvent residue; the method is simple in technological operation, good inrepetitiveness, and high in productive rate. Therefore the method is suitable for industrialized production.

An embodiment of the present invention provides a composite electrode for water treatment based on a metal-based fiber material, comprising: a metal fiber matrix, a micro-nano configuration metal surface layer, a metal oxide catalyst layer and a surface modification layer; the micro-nano configuration metal surface layer is A metal surface layer with micro-nano morphology of micro-columns, micro-wires, micro-rods, nano-rods or nano-wire arrays grown on a metal fiber substrate; the metal oxide catalytic layer is an in-situ growth on the micro-nano configuration metal surface with A metal oxide array with nanowire, nanorod or nanocone morphology; the surface modification layer is a superhydrophobic coating or a conductive coating supported on the metal oxide catalytic layer. The invention has high surface area ratio, high surface area, high effective area under unit mass electrode (specific electrode mass active area), and is suitable for different water treatment scenarios due to the special micro-nano interface characteristics and the open structure of the fiber electrode, and has strong oxidizing ability at the same time. , excellent mass transfer performance, long service life, easy processing, low energy consumption.

A process for extracting the buckwheat protein from the buckwheat bran includes such steps as controlling the content of water in buckwheat, extruding for puffing, extracting in the aqueous solution of NaOH, recovering supernatant, regulating pH value until its isoelectric point of protein, educing out protein, removing filtrate, drying and pulverizing.

Catalysts are disclosed comprising fibrous substrates having silica-containing fibers with diameters generally from about 1 to about 50 microns, which act effectively as “micro cylinders.” Such catalysts can dramatically improve physical surface area, for example per unit length of a reactor or reaction zone. At least a portion of the silica, originally present in the silica-containing fibers of a fibrous material used to form the fibrous substrate, is converted to a zeolite (e.g., having a SiO2 / Al2O3 ratio of at least about 150) that remains deposited on these fibers. The fibrous substrates possess important properties, for example in terms of acidity, which are useful in hydroprocessing (e.g., hydrotreating or hydrocracking) applications.

The invention discloses a production technology for preparing methanol by continuous oxidation of methane, comprising the following steps: methane gas and solvent dissolved with catalyst are respectively preheated to the reaction temperature of 160-220 DEG C and are added into a packed bubbling tower from the entrance of the bottom of the packed bubbling tower, and the two flow upward and pass through the packed bubbling tower, and the retention time is 10-40min; the reaction pressure is 1-6MPa, liquid phase product of methyl hydrogen sulphate is generated by reaction, and methanol is obtained by rectification and hydrolysis; and the reacted tail gas is discharged from the exit of the top of the packed bubbling tower. The invention has the advantages of simple technology, low running cost, selection of suitable reactor and capability of continuous production, belonging to the field of methanol production.