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10346results about How to "Improve separation efficiency" patented technology

High-performance two-dimensional layered Ti3C2-MXene membrane, preparation method thereof and application of membrane in water treatment

The invention belongs to the technical field of membrane preparation and water purification and discloses a high-performance two-dimensional layered Ti3C2-MXene membrane, a preparation method thereof and an application of the Ti3C2-MXene membrane in water treatment. The method comprises steps as follows: (1), Ti3AlC2 powder and an HF solution are mixed, stirred for a reaction, centrifugally washed and dried, and Ti3C2 powder is obtained; (2), the Ti3C2 powder and a solvent are mixed, stirred for the reaction, washed and dried, and treated powder is obtained; (3), the treated powder is dissolved in the solvent and subjected to ultrasonic treatment and centrifugation, a liquid supernatant is taken and dried, and a two-dimensional nanosheet is obtained; (4), a solution is prepared from the two-dimensional nanosheet and deposited on a porous substrate with a nano self-assembly technology, and the high-performance two-dimensional layered Ti3C2-MXene membrane is obtained. The membrane has ultrahigh water flux, higher selectivity and good mechanical property and stability; the method is simple, low in energy consumption and cost, good in repeatability and wide in applicability.
Owner:SOUTH CHINA UNIV OF TECH

Full-component resource reclamation method for waste positive electrode materials of lithium ion batteries

The invention provides a full-component resource reclamation method for waste positive electrode materials of lithium ion batteries. The method comprises the following steps: 1) separating active substances and aluminum foils in waste positive electrode materials of lithium ion batteries by using an aqueous solution of fluorine-containing organic acid and carrying out liquid-solid-solid separation so as to obtain leachate, the lithium-containing active substances and the aluminum foils; 2) respectively carrying out high temperature roasting and impurity removal with alkali liquor on the lithium-containing active substances; 3) respectively carrying out recovery of the fluorine-containing organic acid through addition of acid and distillation, deposition of impurity ions through addition of alkali and ammonium carbonate coprecipitation on the leachate so as to prepare nickel-cobalt-manganese carbonate ternary precursor; and 4) carrying out component regulation on a mixture of the treated active substances and the nickel-cobalt-manganese carbonate ternary precursor, adding lithium carbonate in a certain proportion and carrying out high temperature solid phase sintering so as to prepare a lithium nickel cobalt manganese oxide ternary positive electrode material. The method provided in the invention has the following advantages: the application scope of the method is wide; separation efficiency of the lithium-containing active substances and the aluminum foils is high; short-flow direct re-preparation of positive electrode materials in waste lithium ion batteries is realized; and the method is applicable to large-scale resource reclamation of waste lithium ion batteries.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Wastewater treatment method and device combining electrochemical degradation and photocatalysis oxidation technologies

The invention relates to a wastewater treatment method and device combining electrochemical degradation and photocatalysis oxidation technologies taking a diamond film electrode as the anode. The device comprises a flowing electrolytic bath and a photocatalytic reactor. Contaminants have electrocatalytic oxidation at the anode of the flowing electrolytic bath and are electrolyzed to separate out water and then enter the photocatalytic reactor for further degradation. The combination of two technologies can improve the current efficiency reduction caused by oxygen analyzing reaction in an electrochemistry part because oxygen analyzed by the electrochemistry part is a favorable trapping agent of photoelectrons of a photocatalysis part, can improve the separation efficiency of the photoelectrons and cavities and improve the catalytic degradation of the photocatalysis part. Meanwhile, by opening or closing various parts of the device, proper operational modes can be selected according to the kinds and the concentration of wastewater, such as an independent electrochemistry method, an independent photocatalysis method, an electrochemistry and photocatalysis combined method and other different operational modes.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI

Separation device for detaching and stacking stamped sheet metal

ActiveCN104444396AReduce wearReduce prime mover loadDe-stacking articlesEngineeringMetal
A separation device for detaching and stacking stamped sheet metal comprises a driving mechanism, a pushing mechanism, a lifting mechanism, a separating mechanism and a sheet metal supporting base. The sheet metal supporting base is used for supporting the other mechanisms and stacking the sheet metal. The pushing mechanism allows a pushing assembly to slide linearly in the horizontal guide direction of a guide support through a vertical slide rod connected with a cylinder so that the effect of pushing out the sheet metal on the top layer can be achieved. The lifting mechanism controls the guide support to rise and fall by adjusting the number of rotation circles of a screw so that a push block can always keep aligned with the sheet metal on the top layer when starting to work. The separating mechanism is connected to the lifting mechanism when a steel wire rope is wound around a pulley so that the separating mechanism can synchronously rise and fall together with the lifting mechanism under the influences of the gravity of the separating mechanism. A separating rod can prevent the sheet metal on the top layer from absorbing the sheet metal on the lower layer and sliding together with the sheet metal on the top layer, and a separating inclined block makes a gap formed between the sheet metal on the top layer and a sheet metal stack. The intermittent movement of the pushing mechanism and the lifting mechanism is achieved through double ratchets by means of the driving device. The separation device is easy to operate, high in efficiency, good in separation effect, high in flexibility and wide in applicability.
Owner:GUANGXI UNIV

Microfluidic chip for capillary electrophoresis separation and chemiluminescence detection

The invention discloses a microfluidic assay chip integrated capillary electrophoresis separation with chemiluminescence detection. The microfluidic chip consists of a buffer solution storage tank, a sample liquid storage tank, a sample waste liquid tank, a waste liquid tank, a sheath flow storage tank, a sample introduction channel, a separation channel, a sheath flow channel and a detection channel. A terminal of the separation channel and a starting point of the detection channel are communicated with the sheath flow channel. A chemiluminescence reagent enters the detection channel through the sheath flow channel; and when compositions to be assayed after the capillary electrophoresis separation of the chip meets the chemiluminescence reagent at a connecting point of the separation channel and the detection channel, the compositions are mixed with chemiluminescence reagent in the detection channel and then undergo luminous reaction. The inside of the separation channel is provided with a microporous plug to prevent the chemiluminescence reagent from flowing backwards into the separation channel under the driving of pressure difference so as not to influence electrophoresis separation. The microfluidic assay chip has the characteristics of high separation efficiency, high detection sensitivity, simple structure, small volume, light weight, convenient operation and the like, and is ideal to prepare a portable micro total separation system.
Owner:ZHEJIANG UNIV

Slurry bed reactor and uses thereof

The invention provides a slurry-bed loop reactor, comprising an ascending pipe and at least one downtake pipe 3, wherein, the ascending pipe consists of a reaction zone 1 and a settlement zone 2 with an expanded pipe diameter; an exhaust port 13 is arranged on the top of the settlement zone 2; the inside of each downtake pipe 3 is divided into a filtrate zone 5 and a slurry zone 6 by a filter medium 4, wherein, the filtrate zone 5 is communicated with a liquid discharge port 10; two ends of the slurry zone 6 are communicated with two ends of the ascending pipe 1, so the settlement zone 2 is separated into a steady flow zone 19 and a turbulent flow zone 20, wherein, the upper part of the steady flow zone 19 is communicated with the downtake pipe 3 through a pipeline 16; and the bottom of the steady zone 19 is directly communicated with the reaction zone 1 through an open pore 18 or through a draft tube 17. The slurry-bed loop reactor provided by the invention can realize continuous high-efficiency separation of solid catalyst particles, a liquid product and reacting gas, realize continuous discharging of a gas phase, a liquid phase and a solid phase, reduce turbulence of rising slurry from the reaction zone to settling particles in the settlement zone by separating the settlement zone into the turbulent flow zone and the steady flow zone, improve the separation efficiency of the settlement zone, and reduce the filtering load of the downtake pipe, thereby improving the treating capacity and the separation efficiency of the whole reactor, and prolonging the backsurge period.
Owner:CHINA PETROLEUM & CHEM CORP +1

Carbon dioxide industrial-scale separation and purification system and method in mixture gas by hydrate method

The invention discloses a system and a method for industrially separating and purifying CO2 in mixed gas by a hydrate method. The system consists of a feed gas pretreatment system, a hydrate separation tower, a micro-bubble jet-loop reaction system, a column bottom hydrate decomposition system, a CO2 product collection system, a hydrate formation and decomposition heat comprehensive utilization system and a tail gas energy recovery system. The method integrates hydrate bubbling reaction technology, spraying reaction technology and micro-bubble jet reaction technology, adopts CO2 reflux displacement fractionation technology to improve the concentration of the CO2 in a hydrate phase, has simple separation technology and device and high separation rate and efficiency, comprehensively utilizes the formation heat and decomposition heat of the hydrate during refrigeration cycle, simultaneously recovers compression work of tail gas and cold energy for feed gas pretreatment, and has low energy consumption and cost during separation. The system and the method can be applied to industrial and continuous separation and purification of the CO2 in the mixed gas such as flue gas (CO2 / N2), IGCC synthetic gas (CO2 / H2), biomass synthetic gas (CO2 / H2), natural gas (CO2 / CH4), coalbed gas and the like.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI

Magnetic response type high-efficiency oil-water separation fiber membrane and preparation method thereof

InactiveCN104436760AResponsiveMagnetic field responsiveLiquid repellent fibresNon-woven fabricsFiberMicro nano
The invention discloses a magnetic response type high-efficiency oil-water separation fiber membrane and a preparation method thereof, and belongs to the field of functional micro-nano fiber materials. The magnetic response type high-efficiency oil-water separation fiber membrane disclosed by the invention is prepared by the following steps: dissolving hydrophobic polymers, such as polyvinylidene fluoride, polyurethane or polycaprolactone, as main raw materials into an organic solvent to form a polymer solution; preparing a non-woven fiber membrane material prepared from micro-nano structure fibers by adopting an electrospinning method; forming a sticky polydopamine membrane through polymerization of polydopamine in an alkaline solution, and firmly attaching magnetic nanoparticles onto the surface of an electrospinning fiber membrane by adopting the sticky polydopamine membrane, so as to prepare the magnetic response type high-efficiency oil-water separation fiber membrane. The fiber membrane disclosed by the invention has a super-hydrophobic/super-oleophilic property in air, and has an excellent adsorptive property on a plurality of common oils; the preparation method of the high-efficiency oil-water separation fiber membrane, disclosed by the invention, is simple, low in energy consumption, and high in efficiency,and can be widely applied to the fields such as remote controllable efficient separation of oily wastewater, and the magnetic responsiveness is realized.
Owner:BEIJING INSTITUTE OF CLOTHING TECHNOLOGY

Process for recovering heavy metallic salt and inorganic acid in pickling waste liquid

The invention relates to a process for separating and recovering heavy metallic salt and inorganic acid in pickling waste liquid by a membrane method, which comprises the following concrete steps: filtering and removing solid suspended substances in pickling waste liquid through an inorganic ceramic membrane; separating acid from salt in the ceramic membrane penetrating liquid through diffusion dialysis; and heating the dialysis liquid of a diffusion dialyzer, then introducing the dialysis liquid into a nanofiltration membrane, and cooling and crystallizing the concentrated liquid of a nanofiltration device and then centrifuging the crystal of the concentrated liquid to obtain iron salt, wherein the penetrating liquid of the nanofiltration device passes through a reverse osmosis membrane device, the concentrated liquid of the reverse osmosis device returns to a pickling section, and the water discharged from the reverse osmosis device enters a diffusion dialysis section for recycling. The invention has the characteristics that the pickling waste liquid is completely used as resources, the recovery process is simple, the recovery ratio of metallic salt and acid is high, and water is recycled. The process of the invention can be coupled with various pickling sections to realize continuous and stable automated operation, and the supplemented acid amount can be quantitatively controlled according to the acid amount consumed by the crystallized metallic salt.
Owner:NANJING UNIV OF TECH +1

Magnetism/metal/fluorescence composite silicon dioxide nano particle and preparation method thereof

The invention relates to magnetic / metal / fluorescence compound silicon dioxide nanometer particle and preparation method thereof, pertaining to nanometer material technical field. The nanometer particle is covered with an internal magnetic core, a metal layer and a lighting layer in sequence from interior to exterior; the internal magnetic core consists of organosilicon covering 6-1,000 ferrite nanometer particles; the metal layer is of a connection shell layer made of Ag or Au; the lighting layer is of SiO2 layer doped with organic lighting dye. The preparation method comprises steps of preparation of ferrite nanometer particles, laying silicon dioxide and metal layer to the internal magnetic core through inorganic silicon resource and organic silicon resource, secondary organic silicon layer coating and the coating of the layer doped with organic lighting dye. The nanometer particle of the invention has high lighting intensity and can dramatically improve detection sensitivity when being applied in biological marker, has rapid response in magnetic field, which improves separating rate; during preparation course, the control of magnetic matter content, diameter of particle and silicon dioxide shell layer through adjustment of reaction conditions.
Owner:JILIN UNIV

Method for recycling acetic acid in dilute acetic acid

The invention relates to a method for recycling acetic acid from diluted acetic acid, and aims at solving the problem that the recycling of acetic acid in the hydrolysis of furfural and methyl acetate as well as the Fischer-Tropsch combined production is difficult. The invention comprises the steps as follows: a) diluted acetic acid is extracted by a pulse filling extracting tower, the extractionphase containing extracting agent, the acetic acid and little water for the tower top is acquired, and the residual extraction phase of water containing micro acetic acid from the tower kettle is acquired; b) the extraction phase in an extracting agent recycling tower is conveyed; c) acetic acid 1 is fed into an azeotropic rectifying tower which utilizes one kind of benzene, cyclohexane, ethyl acetate, isopropyl acetate and butyl acetate as the extrainer, two-phase mixture of the extrainer and the water at a phase separator at the top of the tower is acquired, the water is extracted out from the tower top, and the retrainer returns into the tower. The utility model has the technical proposal of producing pure acetic acid at the tower top, solves the problems above, and adapts the industrial productions including recycling of acetic acid from wasted aldehyde water and extracting and refining acetic acid in the methyl acetate hydrolysis technique.
Owner:SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC

Device for breaking walnut shells and taking walnut kernels, having functions of self-positioning, pre-breaking shells, equidirectional spiral self-grading and flexible extrusion

ActiveCN106473167AReduce grading processPrecise pre-crackingHuskingHullingWalnut NutReciprocating motion
The invention discloses a device for breaking walnut shells and taking walnut kernels, having functions of self-positioning, pre-breaking shells, equidirectional spiral self-grading and flexible extrusion. The device comprises an intermittent feeding device, the a shell pre-breaking device, a flexible shell breaking device and a separating device, which are fixed on a machine frame, wherein the intermittent feeding device is used for performing intermittent batch feeding for the shell pre-breaking device; the shell pre-breaking device comprises an extruding part and a blanking part which are mutually matched; the extruding part is in reciprocating movement, and is matched with the blanking part for extruding walnuts, so that cracks are generated in the walnuts; the blanking part is in reciprocating movement, so that the extruded walnuts fall off to the flexible shell breaking device; the flexible shell breaking device is used for breaking walnut shells; and shells and kernels of the walnuts after shell breaking are separated for storage through the separating device. The device disclosed by the invention integrates a plurality of systems, and is compact in structure, the manufacturing cost of a machine is reduced, the occupied space for the operation of the machine is also reduced, and the miniaturization and the high efficiency of the machine are facilitated; in structure design, multiple connections including splicing, combining and the like for cooperating work can be realized; and the requirements of various production scales and the requirements of various production sites can be met, and the device is also suitable for families, and is widely applied.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY +2

Efficient cyclone separation device for dust remover

The invention discloses an efficient cyclone separation device for a dust remover, which comprises a barrel body and a filter arranged inside the barrel body, wherein an air inlet communicated with the inside of the barrel is formed on one side of the upper end of the barrel body in tangential direction of the outer wall; the cross section of the outer wall of an air intake way at the upper end of the barrel body, communicated with the air inlet, is helical; and a plurality of air intake guide vanes are evenly arranged inside the air intake way in the circular direction. According to the efficient cyclone separation device for the dust remover, the cross sectional area is gradually reduced from the air inlet to the inside to facilitate the increasement of the tangential speed of the airflow inside the air intake way along with the reduction of the cross sectional area, so as to increase the separation efficiency of an outer eddy side; the air intake guide vanes are arranged inside the air intake way and evenly distributed in the circular direction to facilitate the conversion of the axial speed of the airflow to the tangential speed, reduce the loss of energy of axial downwards speed of an inner eddy and improve the suction power of the dust remover; and therefore, the efficient cyclone separation device for dust remover has the advantages of high efficiency and less power loss and can effectively improve the suction power of a dust remover motor.
Owner:NANJING LG PANDA APPLIANCES

Preparation method of durable super-hydrophobic super-oleophylic foamy copper for oil and water separation

The invention provides a preparation method of durable super-hydrophobic super-oleophylic foamy copper for oil and water separation. The preparation method comprises the followings steps: firstly, the foamy copper is sequentially put in an ethanol solution and an acetone solution for ultrasonic cleaning and treated with a hydrochloric acid aqueous solution to remove oil stain and oxide skin; for the cleaned foamy copper, a chemical etching or electrochemical deposition method is used to pre-roughen a foamy copper framework so as to improve the membrane-based binding force; then, a dip-coating-sintering method is adopted to obtain a ZnO crystal seed layer on the surface of the framework, and a compact ZnO array nano structure grows in an oriented manner through a chemical bath manner so as to improve the strength and stability of a film layer; finally, fluoridation is performed on the foamy copper to realize the super-hydrophobic super-oleophylic feature and the oil and water separation function. Through the pre-roughening of the foamy copper framework and the compactly arranged zinc oxide nano structure, the strength of the film layer and the membrane-based binding force can be improved, and the damaging and falling behavior of the film layer during oil and water separation by the foamy copper can be reduced, so that the durable oil and water separation capacity of the foamy copper can be improved.
Owner:SOUTHEAST UNIV
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