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.

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 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 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 withalcohol dissolvent; separating; merging filter liquor; e, condensing the filter liquor; cooling; aging; proceeding chromocor evolution; separating; washing; drying; getting the extract.

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 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.

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.