31results about How to "Improved mass transfer resistance" patented technology

The invention relates to a stable gas membrane used for removing, recovering, and gathering ammonia or organic amine from dosage liquor or wastewater. The gas membrane comprises a membrane shell, hollow fibrous membranes (A) and hollow fibrous membranes (B). A cavity is provided in the middle of the membrane shell. An inlet and an outlet are respectively arranged on each of the two ends of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are positioned in the cavity of the membrane shell. A shell pass outlet communicating with the atmosphere is arranged on a lower end of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are uniformly arranged in the membrane shell with regular spaces. Dosage liquor or wastewater containing ammonia or organic amine is delivered through the tube pass of the hollow fibrous membranes (A), and absorption liquid is delivered through the tube pass of the hollow fibrous membranes (B). With the gas membrane provided by the invention, problems of traditional gas membranes of leakage and low service life are overcome; dilution of a byproduct ammonium salt solution caused by a concomitant osmotic distillation phenomenon can be effectively inhibited; ammonium salt concentration of the byproduct ammonium salt solution can be increased from 10-20% to 20-40%; mass transfer coefficient at the acid absorption liquid side can be substantially improved; the ammonia removing efficiency is high; the ammonia removing effect is stable for a long-term; and the service life of membrane sets can be improved by 3-10 times than common gas membranes.

The invention relates to a film coating agent for an extract medicament solid preparation, which comprises the following components in parts by weight: 30-60 parts of hydroxypropyl methyl cellulose, 5-30 parts of plasticizer and 2-30 parts of stearic acid. The invention also relates to a preparation method of the film coating agent, which comprises the following steps of: (1) weighing the hydroxypropyl methyl cellulose, the plasticizer and the stearic acid in parts by weight; and (2) adding the hydroxypropyl methyl cellulose, the plasticizer and the stearic acid into a high-speed shearing machine and uniformly mixing the materials at the speed of 350-600 rpm to prepare a coating agent finished product. The coating agent is safe and non-toxic, and can form a hydrophobic molecular layer onthe surface of a medicament for inhibiting the adsorption and osmosis of steam on the surface of a coating film, thereby reducing the moisture absorbing rate of a medicament coating tablet and preventing the damping and hardening of the medicament and medicament efficiency loss; meanwhile, the coating film has strong flexibility, and the coating quality is stable; and the preparation method has the outstanding advantages of high production efficiency, low energy consumption, favorable application performance of coating agent finished products, and the like.

The invention discloses a technology for producing ammonium sulfate and ammonium nitrate by simultaneously desulfurizing and denitrating the smoke of ammonia water and cobaltic ethylenediamine (II) by a wet method, which can realize that SO2 and NO are respectively converted into (NH4)2SO4 and NH3NO3 chemical fertilizers so as to realize the recycling of the SO2 and the NO. The method is different from ordinary denitration converting the NO into N2, but a traditional absorption method is adopted, and the method has moderate operation condition, is carried out under the conditions of normal temperature and normal pressure, and has high desulfurizing and denitrating effect, low investment, low operation expense and easy regeneration of absorption liquid.

The invention discloses an anticorrosive chromium-free passivating agent for a battery steel shell and a preparation method of the anticorrosive chromium-free passivating agent for the battery steel shell. The anticorrosive chromium-free passivating agent is prepared from, by mass, 5-15 parts of sodium bisulfite, 5-10 parts of titanyl nitrate, 1-5 parts of epoxy silane, 3-11 parts of tartaric acid, 1-5 parts of citric acid, 2-8 parts of sodium benzoate, 2-8 parts of acetic anhydride, 4-8 parts of tetramethyl orthosilicate, 1-5 parts of diamido-di-imidole, 0.2-1.6 parts of linolenate, 3-7 parts of tetraethyl orthosilicate, 2-5 parts of vanadate, 2-6 parts of surfactant and 30-60 parts of water. The passivating agent can form a compact film structure on the surface of the battery steel shell, the surface of the steel shell is smooth and compact, porosity is remarkably reduced, the corrosion potential is increased, corrosion current is reduced, the potential range of an anodic passivation area is widened, the mass transfer resistance is remarkably increased, and the corrosion-resistant performance is remarkably superior to the corrosion-resistant performance of a current passivated steel shell.

The invention discloses a rotary type hollow fiber porous membrane foamless oxygen charging device and method. The device comprises a rotary foamless membrane type oxygen charging assemble, an air supplying and exhausting system, a water supplying and draining system and a motor and electrical control system. In the method, the raw water is added in an activated sludge aeration basin, the rotary foamless membrane type oxygen charging assemble rotates in the aeration basin at the speed of several to tens revolutions per minute, the oxygen charging adopts the intermittent air charging and discharging way, the air feeding pressure is controlled under the bubble point of the fiber membrane, the oxygen is dissolved rapidly on the membrane surface and is dispersed into the sludge water under the drive of the concentration difference and the pressure difference, the dissolved oxygen concentration is kept at 1 to 2.5 mg / l, the rotary oxygen charging assemble play the role of the mixing and activated sludge stirring. Compared with the traditional aeration method, the invention has high oxygen transmissibility, good oxygen charging effect, little oxygen charging amount, lower energy consumption, little membrane pollution, and convenient change and maintenance, and is very suitable for the upgrading and reforming of the activated sludge aeration basin in the sewage treatment technology.

The invention discloses a silicon wafer hair-cutting liquid with no microscopic surface sharp corners and controllable roughness. The addition amount of each component can realize the controllable roughness of the surface of the silicon wafer after etching and no microscopic sharp corners are generated on the surface of the silicon wafer after etching.

The invention discloses an L-lactic acid fermentation method by using polyvinyl alcohol to solidify rhizopus oryzae. The method comprises the following steps: heating polyvinyl alcohol and sodium algiThe invention discloses an L-lactic acid fermentation method by using polyvinyl alcohol to solidify rhizopus oryzae. The method comprises the following steps: heating polyvinyl alcohol and sodium alginate in a boiling water bath to be jointly dissolved; mixing with a rhizopus oryzae spore suspension; using an injector to drip the mixed solution to a saturated boric acid solution containing calciumnate in a boiling water bath to be jointly dissolved; mixing with a rhizopus oryzae spore suspension; using an injector to drip the mixed solution to a saturated boric acid solution containing calcium chloride while using a magnetic stirrer to continuously stir so that particles are spherical and good immobilized particles can be hardened at a low temperature; and then, treating by a monobasic sodchloride while using a magnetic stirrer to continuously stir so that particles are spherical and good immobilized particles can be hardened at a low temperature; and then, treating by a monobasic sodium phosphate solution and washing with distilled water after solidified cells are propagated and grow so as to be used for the batch fermentation and the repetitive batch fermentation of the L-lacticium phosphate solution and washing with distilled water after solidified cells are propagated and grow so as to be used for the batch fermentation and the repetitive batch fermentation of the L-lactic acid. The improved L-lactic acid fermentation method by using the polyvinyl alcohol to solidify the rhizopus oryzae overcomes the defects of spherical carriers and poor permeability of the prior polyacid. The improved L-lactic acid fermentation method by using the polyvinyl alcohol to solidify the rhizopus oryzae overcomes the defects of spherical carriers and poor permeability of the prior polyvinyl alcohol and has the advantages of great mechanism strength, large acid production amount, high acid production speed and good repetitive use effect.vinyl alcohol and has the advantages of great mechanism strength, large acid production amount, high acid production speed and good repetitive use effect.