36results about How to "Increase feed concentration" patented technology

The invention discloses a finishing method to synthesize carbinol, which is characterized by the following: rectifying rough carbinol in the pre-tower; adding extracting water from the top of pre-tower; discharging light component from the top of pre-tower; entering rought carbinol into middle part of pressurizing tower to rectify; making residual rough carbinol into middle part of normal pressure tower to rectify; draining waste water from the bottom of tower; dividing the steam of pressurizing tower into two parts to transmit into reboiler on the bottom of pre-tower and reboiler on the bottom of normal pressure tower as heat providing dielectric.

The invention relates to high-purity rice bran protein and rice bran fibers, and further relates to a preparation method of the high-purity rice bran protein and the rice bran fibers. The preparation method includes the steps of raw material pretreatment, first size mixing and enzyme reaction, second size mixing and enzyme reaction, separate washing, drying and the like. According to the method, through superfine grinding and amylase and cellulose hydrolyzing, components of defatted rice bran are effectively separated, a whirlcone is utilized to conduct the washing treatment, and therefore separate washing efficiency is greatly improved. Compared with spray drying, flash drying equipment is utilized, investment is saved by about 40%, operating cost is saved by about 35%, in rice bran protein products, the protein content is over 80%, the ash content is below 3%, the fat content is below 0.5%, the protein extraction ratio is over 75%, and in rice bran fiber products, the fiber content is over 70%, the ash content is below 4%, and the fat content is below 1%. The high-purity rice bran protein and the rice bran fibers all can be widely applied to the field of health food, nutritious food and the like, and additional value of rice deep processing is greatly improved.

The invention relates to a thickening and dewatering method for tailings. The method is suitable for thickening and dewatering fine-granule tailings adopting dry stockpiling or a comprehensive utilization plan. According to the method, tailings fed into a stirring barrel are subjected to secondary thickening by adopting a hydrocyclone so as to increase the concentration of tailings fed into a ceramic filter, overflow of the hydrocyclone and filtrate of the ceramic filter are returned to a thickening pond and mixed with fine-granule tailings discharged from an ore dressing process so as to reduce the concentration of the tailings and to increase the deposition speed of the tailings, thus finally achieving the objectives of increasing the efficiency of the ceramic filters and reducing the cost of dewatering.

The invention relates to a preparation method of edible rice protein. The method comprises the following steps of pre-treating raw materials, crushing, mixing, reacting, separating and washing, drying and the like. According to the method provided by the invention, macromolecular dextrin in rice dreg is washed by using hot water before being aged; impurities in the rice dreg can be separated from protein which is not dissolved in water by crushing and a salt forming reaction of fat; then a cyclone is used for separating and washing so that the separating and washing efficiency is greatly improved; compared with flash drying and spray drying, the preparation method has the advantages that the equipment investment is saved by about 40% and the operation cost is saved by about 35%; the edible rice protein with the protein dry basis content more than 90%, fat content less than 2% and ash content less than 2% is obtained; the extraction rate of the rice protein is more than 85%; the obtained product can be widely applied in food industries, particularly infant foods; compared with a manner of using the raw material rice dreg as a feed, the preparation method has the advantage that the added value of products is greatly increased.

The invention discloses macroporous resin for adsorbing high-concentration rhenium. The macroporous resin for adsorbing the high-concentration rhenium is prepared by the following preparation steps: preparing a macroporous divinyl benzene-methyl acrylate copolymer skeleton by adopting a suspension polymerization method, and then performing chloromethylation on small copolymer spheres; soaking theprepared chlorine spheres in methyl alcohol for swelling after the chlorine spheres are washed and dried; and adding diaminopro to perform amination reaction to obtain macroporous weak alkaline ion exchange resin. The invention also provides a columnar ion exchange device using the resin; a set of heat exchange component is arranged on the periphery of an ion exchange column, so that the temperature of the ion exchange column is reduced to promote the adsorption of rhenium. According to the ion exchange resin and the device provided by the invention, the problems of low adsorption rate and lowexchangeable capacity of the common ion exchange resin under high rhenium concentration and common operation conditions are solved; the rhenium ion exchange efficiency is greatly improved; and high-efficiency enrichment and recycling of the rhenium are promoted.

The invention belongs to the technical field of separation of hematite in ferrous metals and in particular provides a magnetic separation process of fine lean hematite. The process comprises coarse and fine classified overflow and is characterized by comprising the following steps: feeding the coarse and fine classified overflow with concentration being less than 25% into a concentrator before high-intensity magnetic separation, feeding the bottom flow with concentration being 35-40%, which is concentrated by the concentrator before high-intensity magnetic separation into a low-intensity magnetic separator for low-intensity magnetic separation, wherein the overflow in the concentrator before high-intensity magnetic separation is tailing, feeding the concentrates after low-intensity magnetic separation into concentration operation before floatation, feeding the tailing after low-intensity magnetic separation into a slag remover to remove the slag, feeding the concentrates after the slag remover removes the slag into a high-intensity magnetic separator for high-intensity magnetic separation, feeding the high-intensity magnetic concentrates separated by the high-intensity magnetic separator into concentration before floatation and combining the concentrated tailing before high-intensity magnetic separation, the slag removed tailing and the tailing after high-intensity magnetic separation into the final tailings. The process improves the feeding conditions during low-intensity magnetic operation, reduces the number of the low-intensity magnetic separators needing to be operated and reduces the low-intensity magnetic operation and the final tailings grade.

The invention discloses a method for concentrating and separating two segments of low-intensity magnetic separation iron tailings to obtain ilmenite and a corresponding separation system. The method comprises the following steps: concentrating a first segment of low-intensity magnetic separation iron tailings by using a first sloping-plate thickener (10), and thus obtaining first overflow and first underflow as a coarse ilmenite raw material; mixing the first overflow with a second segment of low-intensity magnetic separation iron tailings, then feeding the mixture into a second sloping-plate thickener (20) for concentration, and thus obtaining second underflow as a fine ilmenite raw material and second overflow as slurry. The concentrations of the first underflow and the second underflow are increased, the particle size separation effect of the first underflow and the second underflow is better, and the phenomenon of coarse particle overflowing of the first overflow and the second overflow is decreased.

The invention discloses a method of producing rare earth isoprene rubber, wherein the method includes the steps of: in the presence of a solvent and under a solution polymerization reaction condition, performing a contact reaction to an isoprene monomer with a rare earth catalyst in a first horizontal bi-axial stirring mixer to obtain a mixture; and performing devolatilization to the mixture in a second horizontal bi-axial stirring mixer. The two horizontal bi-axial stirring mixers are both operated in an isothermal manner. Through the method, not only is material feeding concentration of the isoprene monomer improved but also the rare earth isoprene rubber liquid can be directly devolatilized. The method is free of addition of hot water in the rubber liquid, so that rubber granules are free of dehydration, thereby greatly reducing energy and material consumption.

The invention discloses a method and a device for controlling feeding concentration of an ore grinder. The method comprises the following steps of obtaining a current sound grinding state value of the ore grinder, an oil pressure of a main shaft and an ore grinder power, and calculating a load parameter of the ore grinder according to the current sound grinding state value and the ore grinder power; determining the current oil pressure state and a load parameter state of the ore grinder according to an oil pressure numerical range of the oil pressure of the main shaft and a load numerical range of the ore grinder; reducing the feeding concentration of the ore grinder in response to a high oil pressure state and a high load parameter state that the ore grinder are simultaneously positioned currently; and increasing the feeding concentration of the ore grinder in response to a low oil pressure state and a low load parameter state that the ore grinder is simultaneously positioned currently. According to the technical scheme provided by the invention, when the load state of the ore grinder is high, the feeding concentration is reduced, the load of the ore grinder is reduced, and a mine material is fully smashed; when the load state of the ore grinder is low, the feeding concentration is improved, the efficiency of an ore grinding process is improved, and the energy consumption of the unit ton finished ore is reduced.

The invention relates to a sequential simulated moving chromatographic purification method for resistant dextrin. According to the method, a resistant dextrin preparation liquid is taken as a raw material and contains 40% of resistant dextrin and 40% by mass of impurity sugars; concentration of the pretreated resistant dextrin preparation liquid is regulated to be 60%, and deionized water is usedas an eluent; for sequential simulated moving chromatographic purification of the resistant dextrin preparation liquid, in a first stage, the resistant dextrin preparation liquid and the eluent are fed into a system simultaneously, and discharge is performed at the same time; in a second stage, materials are not fed or discharged, large cycle is performed, and liquid flows from column 1 to column6; in a third stage, only the deionized water as the eluent is fed from the column 1, and part of resistant dextrin components is discharged from a discharge port in the lower end of column 5; a feedport, an eluent feed port, a first discharge port and a second discharge port are moved to next column from the column 1 to the column 6 sequentially to repeat purification cycle until purification isended. The process has low operation cost, and continuous production can be realized.

The invention relates to a method for purifying anthocyanin of black kidney bean peel through simulated moving bed chromatography. The method comprises the following steps: preparing an anthocyanin extract from the black kidney bean peel, pretreating, then adjusting the concentration of the anthocyanin extract to 100-300mg/mL, and conveying into simulated moving bed chromatography equipment; purifying the pretreated anthocyanin extract through the simulated moving bed chromatography, wherein simulated moving bed chromatography equipment consists of 20 chromatographic columns and is divided into an adsorption zone, a refining zone, a desorption zone, a regeneration zone and a water washing zone, the numbers of the chromatographic columns in the five zones are 6, 4, 3, 4 and 3 respectively,and the zones are serially connected; all the zones work at the same time during operation, each chromatographic column moves by one column position clockwise after the operating time reaches the switching time, and continuous operation is achieved by operating in such a way; the obtained purified anthocyanin is further concentrated in vacuum and freeze-dried to obtain refined anthocyanin. By themethod, continuous production can be achieved and the production efficiency is improved.

The invention discloses a high concentration multi-feedstock mixed anaerobic fermentation method, and belongs to the field of renewable energy development and utilization. The method includes the following steps that: pig manure is subjected to precipitation and degritting in a homogenization tank, preheated and put into a fermenter for anaerobic fermentation; rice straw is pretreated in a hydrolysis tank and put into the fermenter for anaerobic fermentation; pigs that die from disease are treated by high temperature digestion for harmless treatment, and the discharged materials enter into thehomogenization tank and are preheated and put into the fermenter for anaerobic fermentation. The method has the advantages of simple method, strong adaptability and simple operation, and can realizecontinuous, large-volume, automatic production and processing, and greatly improve the production efficiency of methane.

The invention discloses a concentration and separation two-section cyclone. The innovation point is that the concentration and separation two-section cyclone is formed by combining a concentration cyclone and a water medium separation cyclone in series, and the concentration cyclone and the water medium separation cyclone are separately arranged; and the concentration cyclone is positioned at the lateral upper side of the water medium separation cyclone. Each of the concentration cyclone and the water medium separation cyclone comprises elements such as a feeding tube, a barrel body, a cone body, an overflow tube, a bottom-flow tube and a flange plate; and a bottom flow hole of the concentration cyclone is connected with the feeding tube of the water medium separation cyclone through a connecting tube. The concentration cyclone can improve concentration of fed materials of the water medium separation cyclone, and also discharges a portion of fine particles, so that the separation effect of the water medium separation cyclone is improved. The concentration and separation two-section cyclone disclosed by the invention can be used for simplifying a process system of a coal preparation plant, is convenient to manage, is small in floor space, and reduces mounting cost and production operation cost.

The invention provides a continuous production method of isoprene rubber and the isoprene rubber produced thereby. The method is carried out in a plurality of adiabatic reactors which are connected in series. The method comprises the following steps of: continuously feeding a reactant containing isoprene, a rare earth catalyst and a solvent from a first adiabatic reactor of the plurality of series-connected adiabatic reactors; refilling the solvent to at least one of the adiabatic reactor following the first adiabatic reactor in order to polymerize isoprene to obtain a rubber solution; and treating the rubber solution by coagulating, dewatering and drying in sequence, wherein an isoprene monomer in the material fed in the first adiabatic reactor is at the concentration of 14 to 50 wt%; and the rare earth catalyst contains neodymium carboxylate with 7 to 14 carbon atoms, aluminum alkyl, halide and conjugated diene. According to the method, the output can be increased, the monomer conversion rate of isoprene reaches more than 96%, and the prepared isoprene rubber contains at least 98wt% of cis-1,4-structure based on the content.