109results about How to "Stable flux" patented technology

In the present invention high performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes and methods for making and using these membranes have been developed. The cross-linked polybenzoxazole and polybenzothiazole polymer membranes are prepared by: 1) first synthesizing polyimide polymers comprising pendent functional groups (e.g., —OH or —SH) ortho to the heterocyclic imide nitrogen and cross-linkable functional groups in the polymer backbone; 2) fabricating polyimide membranes from these polymers; 3) converting the polyimide membranes to polybenzoxazole or polybenzothiazole membranes by heating under inert atmosphere such as nitrogen or vacuum; and 4) finally converting the membranes to high performance cross-linked polybenzoxazole or polybenzothiazole membranes by a crosslinking treatment, preferably UV radiation. The membranes can be fabricated into any convenient geometry. The high performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes of the present invention are suitable for a variety of liquid, gas, and vapor separations.

The present invention discloses a new type of high performance polymer membranes prepared from aromatic polyimide membranes by thermal treating and crosslinking and methods for making and using these membranes. The polymer membranes were prepared from aromatic polyimide membranes by thermal treating under inert atmosphere followed by crosslinking preferably by using a UV radiation source. The aromatic polyimide membranes were made from aromatic polyimide polymers comprising both pendent hydroxy functional groups ortho to the heterocyclic imide nitrogen and cross-linkable functional groups in the polymer backbone. The membranes showed significantly improved selectivity and permeability for gas separations compared to the aromatic polyimide membranes without any treatment. The membranes can be fabricated into any convenient geometry and are not only suitable for a variety of liquid, gas, and vapor separations, but also can be used for other applications such as for catalysis and fuel cell applications.

The invention provides a garbage compression leachate comprehensive waste water treatment device and technological method. The device comprises a grille, a waste water storage tank, an ultrasonic Electro-Fenton reactor, an intermediate water storage tank, an ultrasonic vibration film reactor and a vortex vibration film filtration system, wherein the grille, the waste water storage tank, the ultrasonic Electro-Fenton reactor, the intermediate water storage tank, the ultrasonic vibration film reactor and the vortex vibration film filtration system are sequentially connected. The device further comprises a sludge dewatering drying pool which is connected with a vortex energy-saving heat pump flash evaporator of the vortex vibration film filtration system and provided with a circuit connected with the ultrasonic vibration film reactor. Waste water sequentially flows through the grille, the waste water storage tank, the ultrasonic Electro-Fenton reactor, the intermediate water storage tank, the ultrasonic vibration film reactor and the vortex vibration film filtration system for redox reactions and filtration. The device is high in operability, high in regeneration cycle use rate and low in operation cost.

The invention discloses a membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal. An integrated reactor is formed by an A<2> / O process, a biological membrane process and the MBR. The MBR comprises an anaerobic tank, an anoxic tank, an aerobic tank, a feeding system, an aerating system, a drainage system and automatic control equipment, wherein semi-soft biological membrane fillers are put in the anaerobic tank, the anoxic tank and the aerobic tank; a membrane component is put in the aerobic tank, and a membrane separation region is not independently arranged. The reactor has the advantages that anaerobic phosphorus release and phosphorus accumulation in the aerobic tank are carried out via the sludge on the biological fillers in the anaerobic tank, thus increasing the total removal rate of phosphorus in the sewage; organic matters undergo hydrolytic acidification and organic nitrogen is aminated after the preserved szechuan pickle wastewater passes through the anaerobic tank; nitrification liquor in the aerobic tank flows back to the anoxic tank to form denitrification in the anoxic tank. The MBR has a simple structure and high pollutant treatment efficiency, is light in membrane pollution, and can simultaneously treat the pollutants such as organic matters, total nitrogen, total phosphorus, SS and the like of high salinity wastewater.

The invention discloses a vibrating membrane filtration device which comprises a vibration generation device fixedly connected with a support, a membrane component and a vibration transmission device used for connecting the vibration generation device and the membrane component; the vibration generation device is a motor; the vibration transmission device comprises a bottom plate, a counterweight, an elastic spindle, a transmission shaft and an eccentric block; one end of the elastic spindle is fixedly connected with the center of the bottom plate, and the other end thereof is fixedly connected with the membrane component; the counterweight and the eccentric block are respectively and fixedly connected with both ends of the center of the bottom plate; the rotating shaft of the motor is connected with the eccentric block through the transmission shaft; and the membrane component is provided with a concentrated water pipe, a water inlet pipe and a water outlet pipe, and a filter membrane is arranged in the membrane component. The invention can effectively prevent the filter membrane from being blocked, maintains stable water flux, effectively solves the technical difficult problems of low membrane flux and membrane blockage of wastewater during the filtration process so that a membrane separation technology can be better applied in an industrial wastewater treatment method, thereby not only improving the water treatment efficiency, but also reducing the water treatment cost.

The invention relates to a vibration-type membrane bioreactor, which is characterized by comprising a preheating device, a membrane bioreactor, a biological deodorization device, a vibrating device and a clear water tank unit, wherein the preheating device is a biochemical area in an equipment body; the membrane bioreactor is arranged in a membrane filtration area in the equipment body; the vibrating device is arranged on the membrane bioreactor; the biological deodorization device is arranged on the top of the equipment body; a water outlet at the bottom of the biological deodorization device is communicated with the inside of the equipment body; and the clear water tank unit is a clear water area in the equipment body. The vibration-type membrane bioreactor takes the pressure above the membrane pressure difference of 20 Kpa as a membrane pollution control index, automatically vibrates membrane components, accelerates the falling of membrane pollutants, and prolongs the cleaning period from the prior offline cleaning for one time per 6 months to cleaning for once per 8-9 months, thereby saving 30 to 50 percent of chemical agents, making the membrane flux more stable and the operation cycle of the MBR longer, and prolonging the service life of a membrane.

The present invention discloses a new type of high performance polymer membranes derived from aromatic polyimide membranes and methods for making and using these membranes. The polymer membranes described in the present invention were derived from aromatic polyimide membranes by crosslinking followed by thermal treating. The aromatic polyimide membranes were made from aromatic polyimide polymers comprising both pendent hydroxy functional groups ortho to the heterocyclic imide nitrogen and cross-linkable functional groups in the polymer backbone. The high performance polymer membranes showed significantly improved permeability for gas separations compared to the aromatic polyimide membranes without any treatment. The high performance polymer membranes also showed significantly improved selectivity for gas separations compared to the thermal-treated but non-UV-crosslinked aromatic polyimide membranes. The high performance polymer membranes of the present invention are suitable for liquid, gas, and vapor separations, as well as for catalysis and fuel cell applications.

The invention discloses a phase shift control method of a charging circuit, which comprises a primary side conversion circuit, a secondary side first conversion circuit and a secondary side second conversion circuit. The controller has a phase angle difference phi between the on-off waveform of the power switch in the primary side conversion circuit and the on-off waveform of the power switch in the secondary side first conversion circuit; The controller collects the output current (Io1) and the output voltage (Vo1) of the secondary side first conversion circuit through the secondary side first current collector and the secondary side first voltage collector, comparing and calculating the collected output current and output voltage with the preset output current and output voltage, and adjusting the magnitude and positive and negative of the phase angle difference phi according to the comparison result; The magnetic flux in the transformer can be stabilized when the main circuit outputs light load and no load, and the auxiliary circuit can normally absorb electric energy from the transformer and normally supply power to the outside. At the same time, it can conveniently control theconversion direction and the conversion quantity of the electric quantity in each port.

The invention relates to a comprehensive utilization of pigment of a purple sweet potato in a purple sweet potato and a method for comprehensively utilizing component thereof. The method comprises the following steps: cleaning a fresh purple sweet potato to smash and beat, wherein a proper amount of citric acid is added during the beating process for preventing pigment oxidizing, adding 1 to 3 times of water in a slurry of the purple sweet potato, adding a dosage of 2% to 4% of citric acid, extracting 60 to 80 min for twice; natural subsiding an extract, adding a proper amount of water in the obtained fiber and starch for heating to a gelatinization, refining by a colloid mill after gelatinization, adding milk powder and the other ingredients for homogenizing, drying through a roller to obtain purple sweet potato chips; subsiding the extract to obtain a supernatant for stirring under a temperature of 90 DEG C for 20 to 30 min, and adding a proper amount of Ca(OH)2 after killing enzyme until the pH value reaching 5.5; then centifiguring, wherein a sediment can be taken as a calcium strengthening agent used for a food additive. The obtained supernatant employs an ultrafiltration membrane for removing impurities and a nanofiltration membrane for concentrating; a concentrated liquid of the ultrafiltration membrane is dried to obtain the pigment of the purple sweet potato with 5% of purification. A concentrated liquid of the nanofiltration membrane is dried to obtain the pigment of the purple sweet potato with 20% of purification.

The invention discloses a method for preparing geniposide in eucommia leaf. The method comprises the following steps of crushing eucommia leaf, carrying out cellulase-assistant middle temperature-water extraction, carrying out routine filtration, carrying out ultrafilter membrane impurity-removal, carrying out nanofiltration condensation, carrying out macroporous resin-based separation purification, carrying out condensation and carrying out drying to obtain geniposide powder. The method utilizes cellulase-assistant middle temperature-water extraction of geniposide in eucommia leaf, has an extraction rate of 95%, a low water extraction temperature and short extraction time, utilizes an ultrafilter membrane to remove impurities and separate other side products in the extract, has simple membrane processes and realizes long-term membrane flux stabilization, easy membrane cleaning, a long service life and industrialization. Through the nanofiltration membrane, the extract subjected to impurity removal is concentrate d so that follow-up technical load is reduced and a resin service life is prolonged. Through the method, a nanofiltrated liquid has a COD value <=100 and can be reused in production and basically, waste water is not produced. Through the macroporous adsorption resin, geniposide can be effectively purified. The powder produced by the method has geniposide purity greater than 80% and an extraction rate more than 1.2%.

The invention provides a high-temperature condensed water recycling and purifying with a ceramic membrane filter. The high-temperature condensed water recycling and purifying with the ceramic membrane filter comprises a concentrating tank, a dual-pump structure, the ceramic membrane filter, a cleaning tank and a water purifying tank; the water outlet of the concentrating tank is connected with the water inlet of the dual-pump structure through a pipeline; the water outlet of the dual-pump structure is connected with the circulating water inlet of the ceramic membrane filter; the circulating water outlet of the ceramic membrane filter is connected with a communicating pipe of the dual-pump structure through a pipeline; the water purifying port of the ceramic membrane filter is connected tothe water purifying tank through a pipeline; the water inlet of the cleaning tank is connected with the water purifying port of the ceramic membrane filter through a three-way pipeline; the cleaning solution outlet of the cleaning tank is connected with the water inlet of the dual-pump structure through a three-way pipe; and the cleaning water returning port of the cleaning tank is connected withthe circulating water inlet of the ceramic membrane filter. The high-temperature condensed water recycling and purifying with the ceramic membrane filter is divided into two processing units so that separation and filtration can be separated; and by continuous concentration of water, a processing device for separating according to the physical characteristics of a medium is provided. The device occupies a small area, has high integration degree and a short construction period, and is easy to install.

The invention provides an anti-pollution polyvinylidene fluoride hollow-fiber membrane and a preparation method thereof. The anti-pollution polyvinylidene fluoride hollow-fiber membrane is characterized by being a polyvinylidene fluoride hollow-fiber membrane subjected to amphoteric ionization of amino acid. The preparation method comprises the steps that 1, the surface of a PVDF hollow-fiber membrane is treated by adopting sodium borohydride and other chemical agents, and an active site is introduced; 2, 2-bromine isobutyryl bromine is utilized to fix an initiator to the surface of the membrane; 3, amino acid methacrylamide or amino acid methacrylate is grafted to the surface of the membrane by adopting an SI-ATRP method. The surface-initiated atom transfer radical polymerization (SI-ATRP) method is utilized to graft zwitter-ions of the amino acid to the surface of the PVDF hollow-fiber membrane, and the high-hydrophilicity and high-pollution-resistance hollow-fiber membrane is prepared.

The invention discloses a treatment process of oil-containing sewage in a low-permeability oil field in the technical field of petroleum exploitation. The process comprises the following steps: firstly, carrying out aeration pretreatment to remove sulfide in the oil-containing sewage; then, entering a biological contact oxidation system to degrade crude oil in the oil-containing sewage, wherein the biological contact oxidation system comprises at least two stages of biochemical pools which are connected in series, the biochemical pool is provided with a hydrophilic combined filling material, and the pool bottom of the biochemical pool is provided with an air aeration device; putting an oil-removing microorganism agent in an initial stage of starting in the biochemical pool, and then carrying out efficient aeration sedimentation treatment on extracellular polymers and other biochemically degradable organic substances; and finally, treating by an ultrafiltration membrane filtration system and then injecting into a water tank. The process has the characteristics of small system sludge amount, less oil content in sewage at the membrane inlet, little ultrafiltration membrane pollution,stable membrane flux and long chemical cleaning period of ultrafiltration membrane, and the quality of water at the water outlet of the system reaches the grade A water quality standard of the low-permeability oil field.

The invention provides a preparation method of graphene oxide-modified cellulose acetate forward osmosis membrane. The preparation method comprises the following steps of adding graphene oxide into lactic acid or polyethylene glycol, oscillating, and dispersing by ultrasonic wave, so as to obtain a graphene oxide additive solution; adding cellulose acetate into the graphene oxide additive solution, oscillating or stirring and dissolving for 12-24h at the temperature of 5-60 DEG C until the cellulose acetate is fully dissolved, stilling the prepared graphene oxide-modified cellulose acetate osmosis membrane casting liquid for 5-12h at the normal temperature, and completely defoaming the membrane casting liquid; paving the prepared graphene oxide-modified cellulose acetate osmosis membrane casting liquid on a flat plate paved with a support layer to form the membrane. The preparation method has the advantages that by utilizing the good water transfer promoting function of graphene oxide, the cellulose acetate forward osmosis membrane material is modified, the stable membrane flux and salt rejection rate are obtained, and the anti-pollution capability of the membrane is improved.

The invention discloses a specially-shaped voice coil, and a specially-shaped voice coil winding device and method. The specially-shaped voice coil comprises at least two circumferentially wound coillayers; one sides of the adjacent coil layers are aligned; the other sides of the adjacent coil layers are shaped as steps; and furthermore, any one independent coil is rectangular or quasi-rectangular. According to the specially-shaped voice coil, and the specially-shaped voice coil winding device and method disclosed by the invention, in a same-length winding condition by same enamelled wires, the magnetic flux of the specially-shaped voice coil is greater than that of the traditional rectangular voice coil; direct forming of the specially-shaped voice coil, the single coil of which is rectangular or quasi-rectangular, can be realized; reshaping is unnecessary; the voice coil is high in precision and steady in magnetic flux; the specially-shaped voice coil has two winding forms includinginternal wire incoming and external wire incoming; the cut-in angle can be adjusted through a wire incoming unit; guide and fixation of the enamelled wires are convenient; due to design of a temperature control unit, the enamelled wires of the voice coil are stuck stably and reliably; the overall design is simple; operation is carried out conveniently and reliably; the yield of directly formed products is high; and thus, the specially-shaped voice coil is easy to popularize and apply.

The invention relates to a treatment method and device for pharmaceutical wastewater and belongs to the technical field of water treatment.The treatment method comprises the steps that firstly, biochemical treatment is conducted on the pharmaceutical wastewater; secondly, the outlet water obtained after biochemical treatment is oxidized and / or ultra-filtered; thirdly, the produced water in the second step is reversely osmosed.By means of the method and the device, the pharmaceutical wastewater can reach an emission standard, the reject rate of reverse osmosis membrane outlet water is high, the color value removal rate is high, and flux is stable.

The present invention relates to a light emitting diode (LED) lighting system (10) comprising a plurality of LED light sources for generating a mixed color light, the plurality of LED light sources including at least one LED light source comprising at least one LED adapted to emit light of a first wavelength and a wavelength converter for converting at least a portion of the light emitted from the LED(s) to light of another wavelength, and a control system (33) for individually controlling the flux output of the LED light sources. The control system in turn comprises means for providing feedback of the flux of at least one of the LED light sources, the feedback being based on input from an unfiltered sensor (22) responsive to the actual flux of the individual LED light source, for allowing control of the at least one LED light source in accordance with the feedback, and means for providing first control data based on input from a filtered sensor (36) responsive to the first wavelength flux, for allowing adjustment of at least one LED light source, to compensate for first wavelength leakage of the wavelength converted LED light source(s). The present invention also relates to a system and method for controlling a LED lighting unit.

The invention discloses a method for extracting aucubin from folium cortex eucommiae, aucubin powder is prepared by crushing of the folium cortex eucommiae, cellulase assisted extraction in medium temperature water, conventional filtration, impurity removal by a ultrafiltration membrane, nanofiltration concentration, separation and purification by macroporous resin, concentration and drying; according to the method, the aucubin is extracted from the folium cortex eucommiae by cellulase assisted extraction in the medium temperature water, the extraction rate can reach 95%, the water extraction temperature is lower, and the extraction time shorter; the ultrafiltration membrane is used for impurity removal of an extracting solution, and separation of other by-products, the membrane operation process is simple, the membrane flux can be stable for a long time, the membrane is easy to clean and long in service life and realizes industrialization; an nanofiltration membrane is used for concentration of the impurity removed extracting solution, the load of follow-up processes can be reduced, and the service life of resin is lengthened; the COD value of a nanofiltration filtrate is less than or equal to 100, the nanofiltration filtrate can be reused in the production process, and basically no waste water is not discharged; the macroporous adsorption resin can effectively purify the aucubin, purity of the aucubin in the prepared powder is greater than 62%, and the extraction rate is more than 2.8%.

The invention discloses a continuous circulating pipe membrane bioreactor which comprises a reactor body, wherein at least one contact oxidation cabinet is arranged in the reactor body; the contact oxidation cabinet is connected with a circulating pipe membrane group through a water inlet pump; the circulating pipe membrane group at least comprises a pipe membrane and a circulating pump; the pipemembrane and the circulating pump are mutually connected in series through a backflow pipeline to form a circulating loop; a pipe cavity of the pipe membrane is communicated with a concentrate backflow pipe; a filtering cavity on the outer side of the pipe membrane is communicated with a discharge pipe; and when in work, the ratio V1 / V3 of the water inlet flow V1 flowing through the water inlet pump to the filtered clear liquid flow V3 of the circulating pipe membrane group is 2-10, and the ratio V2 / V3 of the circulating flow V2 flowing through the inner cavity of the pipe membrane to the filtered clear liquid flow V3 is 2-50. The pipe membrane bioreactor disclosed by the invention has the advantages of high efficiency in removing organic pollutants, difficulty in polluting a filter membrane and long service life, and is suitable for centralized treatment of domestic sewage of the ocean engineering equipment and ships as well as cities, houses or other people-intensive areas.

The invention discloses an anti-fouling hollow fiber membrane and a preparation method of the anti-pollution hollow fiber membrane, and provides a hollow fiber membrane capable of resisting fouling of colloidal substances and protein, and the preparation method of the hollow fiber membrane. The preparation method comprises the steps of fully mixing 1-3% of sodium polyacrylate and 3-5% of water, then fully mixing 15-20% of a polymer, 63-65% of a film formation solvent and 10-15% of a film formation additive with the above mixture, removing air bubbles to obtain casting film liquid, extruding the casting film liquid by a spinning nozzle, then enabling the casting film liquid to enter a coagulating bath at 60-80 DEG C, drying at 80-100 DEG C after coagulating for certain time, so as to obtain the anti-fouling hollow fiber membrane, wherein the coagulating bath is aqueous solution containing sodium polyacrylate cross-linking agents. The hollow fiber membrane can effectively reduce nonspecific binding of membrane surface and pollutants such as protein and colloid through a hydrophobic bond, and reduces the membrane surface adsorption, so that the membrane flux is relatively stable and the attenuation rate is reduced.

The invention discloses an electric flocculation membrane bioreactor comprising a reactor body, wherein a contact oxidation tank, a settling tank and a membrane biological reaction tank are arranged in the reactor body; a contact oxidation aerator and soft fillers are arranged in the contact oxidation tank, the membrane biological reaction tank is communicated with a filtration membrane group, the membrane extraction water outlet of the filtration membrane group is communicated to a pure water discharge pipe, a sewage input pipe is further arranged on the reactor body, at least one group of positive and negative flocculation electrodes is arranged in the reactor body, and the positive and negative flocculation electrodes are electrically connected with an electric flocculation power supply; the contact oxidation tank, the settling tank and the membrane biological reaction tank are mutually communicated in sequence, and a precipitate return pipe is arranged in the settling tank and / or the membrane biological reaction tank. The electric flocculation membrane bioreactor disclosed by the invention can not only effectively reinforce the aggregation state of activated sludge, but also improve the cell activity of the sludge bacteria, enhance the deoxidation and dephosphorization effects, alleviate the membrane pollution and improve the flux and prolong the service life of the membrane, thereby being capable of being widely applied in treatment of various of sanitary sewage.

The invention provides a voice coil winding and assembly device used for voice coil winding and assembly of a voice coil and a carrier. The voice coil winding and assembly device comprises a wire incoming unit, a winding unit, a temperature control unit, a detection camera and a transfer and assembly unit, which are integrated into a whole. The voice coil winding and assembly device enables rectangular or quasi-rectangular voice coils to be formed directly without correction; the voice coils are high in precision and stable in magnetic flux; the voice coil winding and assembly device integrates voice coil winding, voice coil detection and voice coil assembly, so that the production efficiency is increased; the voice coil winding and assembly device has a specially-shaped voice coil windingfunction, so that the adaptability of the device is improved; the device can perform fine adjustment of voice coils according to error of carrier assembly grooves, so that the matching connection between the voice coils and carriers is better; a turning mechanism meets the requirement for turning in voice coil assembly and can be adaptive to double-side turning adjustment assembly; with a heatingunit, enameled wires of voice coils can be stably and reliably bonded; the device is high in intelligence degree and smart in overall structure; manpower cost is reduced and the yield of products isincreased; the mechanisms are smoothly connected and run stably.

The invention discloses a cleaning method and a cleaning system of a tubular membrane, and provides a cleaning method and a cleaning system which can recover the membrane flux. The cleaning method comprises the following steps of: cleaning with clean water; cleaning through mixing particles, clean water and air: after mixing particles, clean water and air, and cleaning the mixture of particles, clean water and air in the tubular membrane, wherein air bubbles are broken caused by the collision of air bubbles and particles, energy is released extensively to cause partial vibration, and meanwhile, the particles and air bubbles are both rubbed with the membrane so as to lead to falling of pollutants on the surface of the membrane; and discharging the pollutants to complete the cleaning process. According to the cleaning method disclosed by the invention, the step of cleaning by mixing particles, clean water and gases is added; the air bubbles generated by the gases can be collided with the particles, and energy is released extensively so as to lead to partial vibration; turbulence is formed in a membrane component; particles flow rapidly in a system; and the air bubbles and particles are both rubbed with the surface of the membrane so as to remove surface pollutants. The cleaning effect and the cleaning efficiency can be improved greatly by combining with two aspects.

The invention relates to an energy storage battery of a magnetic-suspending flywheel. The energy storage battery of the magnetic-suspending flywheel is characterized in that a repulsive magnetic suspending bearing between a rotor and a stator of the magnetic-suspending flywheel through an axial permanent magnet and a radial permanent magnet. The flywheel is suspended in a sealed vacuum environment. 12 permanent magnets are arranged in the middle of the flywheel in an array shape and form an integrated generator / motor with 12 coils in the middle of the stator. A flywheel dynamic stable system generates an induced electromotive force so as to generate a lorentz force opposite to an offset direction through the coils in the upper and lower circular discs of the rotor of the flywheel because the rotor is deviated from a normal position, so that the flywheel returns the normal position. An electronic power control system is integrated in the stator. As the coils and the control system generate heat, a heat pipe radiating system discharges heat to ensure normal operation of the system. As the flywheel which rotates at a high speed is of extremely high energy, once the rotor and the stator abrade to quickly generate high temperature, risk can be controlled within the minimum range by quickly and emergently releasing high pressure nitrogen.

The invention discloses an ultralow-pressure membrane separation device for desalinating bitter and salty water. The ultralow-pressure membrane separation device comprises a precise filter, an ultrafiltration membrane system, an ultrafiltration membrane dialysis tank, a nanofiltration (or low-removal-rate reverse osmosis) membrane system, a nanofiltration (or low-removal-rate reverse osmosis) membrane dialysis tank, a reverse osmosis membrane system, a pump and pipelines for connecting various parts; after raw water (the bitter and salty water) is filtered through the precise filter and then introduced to an ultrafiltration membrane for filtration, after the filtration of the ultrafiltration of the ultrafiltration, ultrafiltration dialyzate is introduced into a first-stage nanofiltration (or low-removal-rate reverse osmosis) membrane for treatment, a first-stage concentrated solution is discharged outwards or is used for a backwashing ultrafiltration membrane, or is processed by an energy recycling device so as to increase the pressure for the ultrafiltration dialyzate to undergo first-stage nanofiltration (or reverse osmosis), and water produced from the first-stage nanofiltration membrane is then introduced into a second-stage reverse osmosis membrane system; and second-stage dialyzate is qualified fresh water, and a second-stage concentrated solution is applied to the backwashing ultrafiltration membrane or is discharged outwards or recycled. The ultralow-pressure membrane separation device has the advantages of extremely low equipment operation pressure, good effect on desalinating the bitter and salty water, low equipment operation cost and the like.

The invention creatively provides a technological system for treating terrestrial heat tail water by utilizing a tubular membrane. The technological system comprises a cyclone sand remover, bag type filters, a tubular membrane filtering device, a washing tank, a washing ump, a degassing tank and an electric control device; two sets of the bag type filters are arranged; one bag type filter is usedand one bag type filter is standby, and the two bag type filters are alternatively used; the tubular membrane filtering device is divided into two grades; each grade comprises four tubular membrane filters which are arranged in parallel, three tubular membrane filters are used and one tubular membrane filter is standby; the system is provided with a thermometer, a pressure meter and a flow meter;the electric control device comprises a PLC (Programmable Logic Controller) and can realize online automatic backwashing of equipment and prevent fouling and blocking, so that stable operation of equipment is ensured. The technological system takes a tubular membrane as a core and integrates equipment including the cyclone sand remover, the bag type filters and the like to form a technology of treating the terrestrial heat tail water by utilizing a set of water treatment system; the technological system has the advantages of high integration degree, high automation degree, high treatment efficiency and long service life; water treatment can reach reinjection water quality requirements and the treatment cost of reinjection water is greatly reduced.

The invention discloses a preparation method of a composite lithium metal negative electrode with a three-dimensional structure and a product of the composite lithium metal negative electrode. An inherent pore structure of carbon fiber cloth taking thin-crystal graphite flakes as pore walls not only can relieve volume change in a lithium deposition / dissolution process, but also can introduce a lithium storage mechanism through a lithium insertion / extraction path; and meanwhile, the carbon cloth has light weight and good flexible mechanical properties, and can inhibit the growth of lithium dendrites. In the lithium electrochemical deposition process, the metal lithium and the cobalt fluoride are subjected to an irreversible reduction reaction to form cobalt nanoparticles and the lithium fluoride; the cobalt nanoparticles have smaller binding energy with the lithium metal, so that nucleation sites can be increased, the nucleation overpotential of the lithium metal is reduced, and uniform diffusion of lithium ions is promoted. The lithium fluoride formed in situ has good interface contact with the carbon fiber cloth, has high mechanical modulus, high chemical stability and high interface energy with lithium, and can uniformize lithium ion flux and effectively inhibit dendritic crystal growth of lithium.

The invention relates to a membrane clarification and filtration method for a soy sauce. The method comprises the following steps of additionally mounting electrodes on a stock solution side and a penetrated solution side of a micro filtration membrane, performing procedure-fluctuation regulation on the voltage difference between the electrodes on the stock solution side and the penetrated solution side, changing the direction of an electric field and adjusting and controlling the electric field; besides adjusting and controlling a flow field, so that surface flows of the micro filtration membrane on the stock solution side generate impulse flows; through the coupling of the electric field and the flow field, performing linkage control, and clarifying and filtering the micro filtration membrane of the soy sauce. Compared with the prior art, the membrane clarification and filtration method disclosed by the invention can effectively control the pollution of the organic membrane, improve the operating efficiency and the efficiency energy of the membrane; nutrient components and flavor of products can be well reserved, and besides, muddy articles and bacteria such as micro particles, protein and the like in a raw soy sauce can be thoroughly separated and removed, so that the phenomenon of secondary precipitation is effectively avoided.