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200 results about "Membrane stack" patented technology
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A configuration of endoplasmic reticulum (ER) found in Purkinje cells in the cerebellum and in axons in the lateral vestibular nucleus, consisting of parallel and interconnecting tubules whose outer surfaces are covered by particles or ringlike structures. [ISBN:9780195065718, NIF_Subcellular:sao2114874506]
Membrane Stacks
ActiveUS20080017578A1Improve throughputEasy to separateMembranesGeneral water supply conservationMembrane configurationMolecular physics
The present application discloses a membrane stack comprising a first and second membrane layers, and a spacer layer disposed between said first and second membrane layers, said membrane stack configured such that fluid passes through said membrane stack in a direction substantially perpendicular to the plane of said membrane layers and said spacer layer. The application also discloses a module comprising a membrane as described above, said module having a fluid flow path that is substantially perpendicular to the plane of the major surface of the membrane and spacer layers in said membrane stack.
Owner:MERCK MILLIPORE LTD
Method for treating radioactive wastewater
ActiveCN103177784AImprove processing precisionReduce competitionGeneral water supply conservationRadioactive contaminantsStrong acidsIon exchange
Owner:BEIJING QINGHE CHAOHUA TECH CO LTD
Multi-stage countercurrent electrodialyzer reversal-based method for treating saline wastewater in coal chemical industry
ActiveCN104016529AAchieving processing powerRealize desalination and reuseDispersed particle separationMultistage water/sewage treatmentFiltrationInstability
The invention relates to the field of industrial wastewater treatment processes and provides a multi-stage countercurrent electrodialyzer reversal-based method for treating saline wastewater in the coal chemical industry. The method comprises the following steps: 1) carrying out catalytic ozonation treatment on the saline wastewater in the coal chemical industry; 2) carrying out multi-media filtration and membrane filtration treatment on the wastewater subjected to catalytic ozonation in the step 1) in sequence; and 3) treating the effluent obtained after membrane filtration in the step 2) with a multi-stage countercurrent electrodialyzer reversal, thus achieving deep treatment, desalting and recycling of the saline wastewater in the coal chemical industry, wherein the multi-stage countercurrent electrodialyzer reversal comprises an electrodialysis membrane stack unit, a frequency reversal control unit and an online monitoring and process control unit. The method has the advantages of high fresh water recovery rate, low concentrated water discharge, low operating cost, stability in system operation and the like and can avoid the problems of low fresh water recovery rate, low concentration multiple, high treatment cost, serious membrane pollution, instability in system operation and the like in the routine techniques.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Electrodialysis device applicable to treatment on high-salinity wastewater from industries such as coal chemical industry
InactiveCN102963966AOvercome recoveryOvercoming the low concentration ratio of concentrated waterGeneral water supply conservationDispersed particle separationUltrafiltrationHigh energy
The invention relates to an electrodialysis device applicable to treatment on high-salinity wastewater from industries such as coal chemical industry. The electrodialysis device comprises an electrodialysis membrane stack unit, a frequent polarity conversion control unit and an online monitoring and process control unit, wherein the electrodialysis membrane stack unit consists of a plurality of membrane stacks which are connected with one another in series through pipelines in a desalted department, a concentrated department and a pole compartment respectively and form a multi-level inversion system with solution flow direction control; a programmable logic controller (PLC) unit, a rectifier and a solenoid valve are used for implementing frequent polarity conversion; and solutions in the desalted department and the concentrated department can be cycled or partially cycled, thereby obtaining a high fresh water recovery rate and a high concentrated water concentration multiple. The electrodialysis device can fundamentally solve the problems of low fresh water recovery rate, low concentrated water concentration multiple, high energy consumption and difficulty in long-term and stable operation in the process of treating the high-salinity wastewater in the coal chemical industry and the like by an ultrafiltration-reverse osmosis method, and thus the engineering application of the electrodialysis treatment technology for the high-salinity wastewater in the industries such as the coal chemical industry is promoted.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Process for treating sodium sulfate wastewater by using nanofiltration-reverse osmosis combined membrane
InactiveCN102491452AAchieving zero emissionsSmall footprintAlkali metal sulfite/sulfate purificationWater/sewage treatment bu osmosis/dialysisEvaporationReverse osmosis plant
The present invention relates to a process for treating sodium sulfate wastewater by using a nanofiltration-reverse osmosis combined membrane. According to the process, the pretreated sodium sulfate wastewater is conveyed to a nanofiltration membrane stack through a high pressure pump, and the nanofiltered concentrated solution is subjected to multiple effect evaporation crystallization to obtain an anhydrous sodium sulfate product and condensed water, wherein the condensed water is recycled; the nanofiltered producing water is conveyed to a reverse osmosis membrane stack through the high pressure pump, the resulting concentrated solution returns to the pretreated sodium sulfate stock solution to carry out the secondary nanofiltration, and the reverse osmosis producing water is recycled, wherein the concentrated solution is subjected to the reverse osmosis membrane stack. Compared to other pollution control technologies, the process of the present invention has the following advantages that: the equipment is compact, and the land occupation is small; no morphological and chemical influence is generated to the treated object; the process is a continuous process, and the automatic and uninterrupted operating can be achieved; the process has characteristics of low energy consumption, no phase change, no temperature change, easy control and simple operation; the process can be directly circulated on the site; the sodium sulfate is subjected to concentration, evaporation crystallization, and recovery utilization in the absence of chemical and physical changes, such that the zero discharge of the sodium sulfate wastewater is achieved; the reverse osmosis producing water is adopted as the process pure water to use so as to save a large amount of the process water.
Owner:JILIN JIEN NICKEL IND +1
Immersion type hollow fiber membrane component and complete equipment thereof
ActiveCN101497000AReduce the probability of wire breakageReduce rigid fatigue damageSemi-permeable membranesFiberHollow fibre membrane
The invention discloses an immersion-type hollow fibrous membrane component and complete equipment thereof and belongs to the technical field of manufacturing a membrane component through water treatment. The immersion-type hollow fibrous membrane component consists of membrane silk bundles, membrane end sockets and a central supporting tube; the membrane silk bundles have at least four bundles and are distributed on the periphery of the central supporting tube; two ends of the membrane silk bundles are provided with one membrane end socket respectively, wherein one membrane end socket is a gas inlet end socket; and the other one is a water producing end socket. A plurality of membrane components can be combined into a small unit and a large unit till membrane stacks on the equipment so as to improve service life of the membrane silk and the membrane component; and the structural design of the membrane component concentrates the advantages that the prior strip curtain-type membrane component is uneasy to pollute and the prior columnar membrane component has large membrane filtering area into a whole and has the advantages of large membrane filtering area, convenient mounting of the membrane component, convenient maintenance and the like.
Owner:XIAMEN LEEBAM MEMBRANE TECH
High-hardness salt-containing water concentration method based on monovalent cationic selective electrodialysis
ActiveCN107055713AHigh desalination rateAchieve separationGeneral water supply conservationDispersed particle separationPermeationPrecipitation
The invention discloses a high-hardness salt-containing water concentration method based on monovalent cationic selective electrodialysis. The method comprises the following steps: 1, performing chemical precipitation hardness removal and pretreatment on raw water; 2, performing reverse osmosis desalination treatment; and 3, regulating the pH value of reverse osmosis concentrated saltwater with hydrochloric acid or sulfuric acid to be 4-6 so as to serve as raw electrodialysis water, and enabling the water to respectively enter a desalting chamber and a concentration chamber formed by an anode membrane and a cathode membrane at an interval in an electrodialysis membrane stack, thereby obtaining high-salt electrodialysis water and low-salt electrodialysis water. According to the method disclosed by the invention, extra equipment and devices are not needed, and two ions forming a scale forming matter are separated under the condition that the recovery rate is not changed, so that a scaling phenomenon caused by simultaneous interception or simultaneous permeation is avoided.
Owner:HEBEI UNIV OF TECH
Self-cleaning filtering membrane device
InactiveCN102430339AEasy to useReduce labor intensityUltrafiltrationWater/sewage treatment bu osmosis/dialysisEngineeringMembrane configuration
The invention discloses a self-cleaning filtering membrane device which comprises a membrane shell and a central tube, wherein the central tube passes through the membrane rotatably and horizontally, one end of the central tube is fixedly connected with a filtering membrane stack, the other end of the central tube is fixedly connected with a rotating device, the filtering membrane stack and the rotating device are both positioned in the membrane shell, a spraying device is arranged on the membrane shell and above the filtering membrane stack, and a liquid outlet is arranged at the bottom of the membrane shell; a through hole is formed on the part, corresponding to the filtering membrane stack, of the central tube; a guide hole is formed on the part, corresponding to the rotating device, of the central tube; and the rotating device is rotatably arranged by virtue of the liquid flowing out of the guide hole. In the embodiment of the invention, the rotating device drives the central tubeand the filtering membrane to rotate continuously, and the surface of the filtering membrane is flushed and cleaned all the time since liquid is continuously sprayed on the filtering membrane stack by the spraying device.
Owner:北京怡百信环境工程有限公司
Film-electricity coupling treatment technology for treating difficult-to-biodegrade waste water and device
InactiveCN101306853AAdaptableReduce work stressWater/sewage treatment by electrochemical methodsSustainable biological treatmentElectrochemical responseElectrolysis
The invention belongs to the non-biodegradable organic effluent treatment technical field and particularly relates to a membrane electric coupling technology. The technology is an effluent treatment method that a DC electric field, iron-carbon micro-electrolysis and tubular carbon separation membrane are coupled organically to perform high-efficiency electrochemical oxygenolysis to remove main harmful pollution sources in non-biodegradable effluent produced by industries such as pharmacy, printing and dyeing, so as to realize complete degradation of the non-biodegradable biodegradable organic effluent or convert the non-biodegradable effluent to harmless or degradable low-level organic substances. The technology has advantages of low operation cost, easy installation, membrane stack negative pressure effluence, low working pressure; at the same time, the added DC electric field lower than 10v strengthens the electrochemical reaction effectively, has strong adaptability to acid, alkaline and high temperature of effluent, and can reduce the COD of the non-biodegradable effluent by more than 90 percent and the chromaticity removal ratio can reach over ninety-nine percent with single-stage effluence, notably increasing the solid-liquid separation efficiency and improving the quality of the effluence significantly, and the quality of effluence is stable.
Owner:天津佰腾生产力促进中心有限公司
Membrane Stacks
ActiveUS20110253616A1Improve throughputImproves substantially the flux of a stackMembranesGeneral water supply conservationMembrane configurationMolecular physics
The present invention discloses a membrane stack comprising a first and second membrane layers, and a spacer layer disposed between said first and second membrane layers, said membrane stack configured such that fluid passes through said membrane stack in a direction substantially perpendicular to the plane of said membrane layers and said spacer layer. The application also discloses a module comprising a membrane as described above, said module having a fluid flow path that is substantially perpendicular to the plane of the major surface of the membrane and spacer layers ins aid membrane stack.
Owner:MERCK MILLIPORE LTD
Separator assembly
A novel separator assembly for a spiral flow reverse osmosis apparatus is provided. In one embodiment, the separator assembly comprises a central core element comprising at least one permeate exhaust conduit and at least one concentrate exhaust conduit. Each exhaust conduit defines an exhaust channel and one or more openings allowing fluid communication between an exterior surface of the exhaust conduit and the exhaust channel, said exhaust conduits independently defining a cavity between said conduits. The cavity is configured to accommodate a first portion of a membrane stack assembly comprising at least one feed carrier layer, at least one permeate carrier layer, and at least one membrane layer. A first portion of the membrane stack assembly is disposed within the cavity, and a second portion of the membrane stack assembly is wound around the central core element and forms a multilayer membrane assembly disposed around the central core element.
Owner:BL TECH INC
Process technique for pharmacy wastewater
InactiveCN101108762APlay a role in disinfectionLow costWater/sewage treatment by irradiationGeneral water supply conservationFiltrationActivated carbon filtration
The invention provides a process technology of the pharmaceutical wastewater, which has the steps as follows in turns: preprocess system, ozone disinfection, softening, cartridge filtration, one-pass RO, two-pass RO, ozone disinfection, 254nm ultraviolet disinfection, EDI, active carbon filtration, 185nm ultraviolet disinfection and terminal filter. The invention adopts the disinfecting method combining the ozone and the ultraviolet radiation. The 254nm ultraviolet disinfection can not only function as disinfection but also can remove the remnant ozone and save the ozone removing equipments. The invention adopts EDI instead of the mixed bed resin to realize regeneration while exchanging and produce pharmaceutical water with high quality continuously, and the amount of the ion exchange resin only equals to 5 per cent of the traditional process. Compared with the mixed bed resin, the EDI can realize the continuous effluent, save the regeneration time of the resin and increase the utilization rate of the equipments. The invention combines the EDI and the RO, which effectively reduces the raw water hardness and is beneficial for the EDI membrane stack to operate stably for a long period; at the same time, the invention is beneficial for the fresh chamber water to dissociate and produce enough H+ and OH+, thereby realizing the electrochemical regeneration of the ion exchange resin.
Owner:SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
Layered peptide/antigen arrays - for high-throughput antibody screening of clinical samples
InactiveUS20060275851A1Quick and inexpensiveHigh-throughput detectionBioreactor/fermenter combinationsBiological substance pretreatmentsAntibody screeningMembrane configuration
A method and composition for the identification of biomolecule in a sample are disclosed. The method comprises obtaining a coated capture membrane stack comprising a plurality of capture membranes with each capture membrane coated with a different peptide. The membrane stack is exposed to a sample, and, after a given amount of time for the sample to permeate the membrane stack, the membrane stack is removed from the sample carrier and the capture membrane to which the biomolecule adheres is identified.
Owner:EMMERT BUCK MICHAEL R +1
Central core element for a separator assembly
The present invention provides a central core element for separator assemblies useful in the purification of fluids, for example separator assemblies useful for the desalination of seawater. The central core element provided by the present invention comprises at least two porous exhaust conduits wherein each porous exhaust conduit comprises an exhaust channel and one or more openings which allow fluid communication between an exterior surface of the porous exhaust conduit and the exhaust channel. The central core element defines a cavity into which may be disposed a first portion of a membrane stack assembly. In the preparation of a separator assembly comprising the central core element provided by the present invention, a second portion of the membrane stack assembly forms a multilayer membrane assembly disposed around the central core element. Also provided are central core elements for salt separator assemblies and spiral flow reverse osmosis devices.
Owner:BL TECH INC
Tension control system of plastic packaging film production line
A tension control system in plastic packaging film production line consists of three tension sections connected in series. One tension section is between upper traction and lower traction; another tension section is between the lower traction and friction coil; and the last tension section is between the friction coil and center coil. An upper traction motor, a lower traction motor and a friction coiling motor respectively have a specified value of a datum value, the lower traction motor, the friction coiling motor and a center coiling motor respectively have a specified value of given tension. Each tension section specified value and feedback value are both transmitted to a controller for PID operation. The controller transmits control signals to implement the control over the three tension sections with different tension requirements. By implementing the control over separate sections according to different tension requirements, the invention leads to the overall speed linkage of the whole machine as well as stable operation, has no phenomena such as membrane breaking, excessive stretch caused by oversize tension, as well as membrane stacking, loose winding and the like caused by undersize tension, further improves the quality and precision of product and reaches the production line with advanced international standard.
Owner:恒力石化股份有限公司
Wide-angle-incidence infrared cutoff optical filter without half-wave hole and membrane system design method thereof
The invention relates to a wide-angle-incidence infrared cutoff optical filter without a half-wave hole and a membrane system design method thereof. The wide-angle-incidence infrared cutoff optical filter comprises a substrate, a first membrane stack, a second membrane stack and a third membrane stack, the first membrane stack is deposited on the upper surface of the substrate, the second membranestack is arranged on the upper surface of the first membrane stack, the third membrane stack is arranged on the upper surface of the second membrane stack, the shapes of optical thickness coefficientcurves of high-refractive-index material membrane layers and low-refractive-index material membrane layers of the same membrane stack of the first membrane stack and the second membrane stack are thesame, and the curve shapes are 0-pi sinusoidal waveform or pi-2pi sinusoidal waveform. According to the infrared cutoff optical filter obtained by preparation, when the incident angle is 0-40 degrees, the transmittance of a visible wavelength region is not locally decreased, the half-wave hole is avoided, the average transmittance of the 400-650 nm waveband is greater than 94%, the balance of colors of lights through the infrared cutoff optical filter is guaranteed, and the imaging colors are real.
Owner:无锡奥芬光电科技有限公司
Central core element for a separator assembly
Owner:BL TECH INC
Plate type electro-deionization device
ActiveCN101306855ALess stringent requirementsCompact structureWater/sewage treatment by magnetic/electric fieldsWater qualityFresh water
The invention relates to an electric demineralizer, particularly relates to a plate electric demineralizer. The demineralizer comprises anodes, cathodes and anion exchange membranes and cation exchange membranes between the anodes and the cathodes. One pair of anion exchange membrane and cation exchange membrane forms a concentrate water chamber or a dilute water chamber, the concentrate water chamber and the water dilute chamber are in alternative arrangement, the pair of the anion exchange membrane and the cation exchange membrane is divided into a front membrane stack and a back membrane stack by an electrode water distribution plate, the concentrate water chamber and the dilute water chamber of the two parts of membrane stacks are provided with a partition board inside respectively, the dilute water chamber of the back membrane stack is also filled with ion exchange resin. The invention mainly provides a plate electric demineralizer which can not only reduce the water feed requirements of Electrodeionization (EDI) greatly and save the investment cost for a second-class reverse osmosis device, but also ensure higher quality of the water product; solve the technical problem of high requirements for EDI water feed in the prior art. A pre-demineralizer needs to be increased at the front end so as to improve the quality of water.
Owner:浙江龙净水业有限公司
Method for preparing methanesulfonic acid by utilizing bipolar membrane electrodialysis technology
ActiveCN104557621AHigh yieldHigh puritySemi-permeable membranesSulfonic acid preparationAqueous solutionElectrical resistivity and conductivity
The invention discloses a method for preparing methanesulfonic acid by utilizing a bipolar membrane electrodialysis technology. The method comprises the following steps: treating a sodium methanesulfonate aqueous solution used as a raw material by virtue of a microporus filter; introducing the solution into a feed liquid chamber to perform bipolar membrane electrodialysis treatment; stopping operation when the conductivity of the feed liquid is reduced to be 2000mu s / cm or below, obtaining a methanesulfonic acid solution in an acid chamber, and recycling the alkaline solution in an alkaline chamber. In the bipolar membrane electrodialysis process, the membrane stack treatment is performed by adopting the two-compartment structure, three-compartment structure and four-compartment structure of bipolar membrane electrodialysis, and the yield of the methanesulfonic acid is effectively improved. According to the designed bipolar membrane four-compartment structure, introduction of sodium ions can be effectively blocked in the preparation process, and high-purity methanesulfonic acid is obtained. According to the method disclosed by the invention, the raw material cost is low, the alkali liquor is recycled, and the preparation cost is saved. Moreover, secondary environmental pollution in the traditional organic synthesis method is avoided, and the safety level is improved.
Owner:绍兴众昌化工股份有限公司 +1
Novel high-efficiency filtering water treatment membrane stack
ActiveCN105617865AAvoid bondingImprove processing efficiencyMembranesSemi-permeable membranesWhole bodyTreatments water
The invention discloses a novel high-efficiency filtering water treatment membrane stack. The novel high-efficiency filtering water treatment membrane stack comprises a membrane stack body adopting fixed rings on two ends to fasten a plurality of disc-type membranes which are stacked in a separating manner and sealing rings in a serial connection manner onto a water collection pipe, wherein a spacing net which sleeves the water collection pipe is arranged between every two adjacent disc-type membranes and comprises an installation ring which sleeves the water collection pipe, a plurality of guide pieces which are regularly distributed at the outer side of the installation ring and connected with the installation ring to form a whole body and guide oblique openings formed in the edge of at least one side surface of each guide piece. The spacing nets in various shapes are ingeniously arranged between the adjacent disc-type membranes to separate the adjacent membranes, so that the requirements of various application fields can be met; and water treatment liquid is guided among the membranes, so that the binding of each two adjacent membranes is effectively avoided, the contact area between a membrane face and treatment water is increased under the situation of not increasing the overall size of the membrane stack, the water treatment efficiency is improved, and the service life is prolonged.
Owner:CHENGDU MEIFUTE MEMBRANE TECHNOLOGY CO LTD
Electrolyte chemistry and improved stack performance in high brine concentration electrodialysis
ActiveUS20160228820A1Improved electrodialysisImprove stack performanceMembranesElectrodialysisUnit operationTreated water
Methods for improving ion flux and energy efficiency in a membrane stack of an electrodialysis unit wherein the membrane stack is disposed between an anode and a cathode each in an electrolyte of a selected concentration. Methods include increasing the concentration of the electrolyte, adding a strong base to the electrolyte and adding buffering anions to the electrolyte. Methods for cleaning the electrodes of such a unit involving involve applying a pulsed polarity reversal to the electrodes. Also provided are methods for improving unit operation by increasing the basicity of the electrolyte to the anode and increasing the acidity of the electrolyte to the cathode or alternatively or in addition, by applying heat to increase the operating temperature of at least one of the electrolyte and the treated water stream.
Owner:GAS TECH INST
Plate-type vacuum membrane distillation evaporator and application thereof
ActiveCN106731852AStable temperatureReduce trafficGeneral water supply conservationSeawater treatmentWater desalinationComputer module
The invention relates to a plate-type vacuum membrane distillation evaporator and application thereof. The evaporator comprises a steam inlet side end plate on the left side and a steam outlet side end plate on the right side, wherein modules composed of a secondary steam channel sealing ring, a plate-type membrane frame, a feed liquid channel sealing ring, a heat exchange plate frame, a heater steam channel sealing ring, a heat exchange plate frame, a feed liquid channel sealing ring and a plate-type membrane frame are sequentially arranged and mounted between the steam inlet side end plate and the steam outlet side end plate from the left to right; and the multiple modules are sequentially connected to form a membrane stack by the secondary steam channel sealing ring. According to the application, multiple evaporators are combined into a high-efficiency and compact multiple-effect plate-type membrane distillation sea water desalination system. According to the plate-type vacuum membrane distillation evaporator and application thereof disclosed by the invention, gradient utilization ratio and thermal efficiency of membrane distillation vaporization latent heat are greatly improved, and the device has the advantages of compactness, high efficiency, high thermal efficiency, great water producing ratio and the like.
Owner:TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
Ultra-pure water preparation system and method capable of preventing electrodeionization device from scaling
InactiveCN105198133AReduce salt contentAvoid formingMultistage water/sewage treatmentNon-contaminated water treatmentActivated carbon filtrationIon exchange
The invention provides an ultra-pure water preparation system and method capable of preventing a electrodeionization device from scaling. The preparation system is mainly composed of a raw water pretreatment system, a reverse osmosis system and an electrodeionization system. The raw water pretreatment system comprises a raw water booster pump, a mechanical filter, an active carbon filter and a precision filter, raw water enters the booster pump through a pipeline, and the mechanical filter, the active carbon filter and the precision filter are sequentially connected to the back of the booster pump; the reverse osmosis system comprises a high-pressure pump and a first-grade reverse osmosis device which is composed of a membrane component, a membrane shell, a pipe valve and a control system; the electrodeionization system comprises a fresh water pump, an EDI membrane stack and a rectifier; a water producing tank arranged at the back of the first-grade reverse osmosis device is connected to the membrane stack through the fresh water pump, the rectifier provides an electric field to form a membrane stack electric current, ion exchange resin in the EDI membrane stack continuously removes anions and cations in water through ion exchange, and the ultra-pure water is produced.
Owner:ZHEJIANG GONGSHANG UNIVERSITY
Technology and device for removing heavy metal ions in electroplating wastewater
InactiveCN103708585AEfficient recyclingLow costDispersed particle separationWaste water treatment from metallurgical processElectricityElectroplating wastewater
The invention provides a technology and a device for removing heavy metal ions in electroplating wastewater, and belongs to the electroplating wastewater treatment technology. The continuous electrodeionization technology is employed to remove heavy metal ions with low concentrations in a solution and recyle the metal ions, which plays an important role in environmental protection. The metal ions which go into a membrane stack are transferred towards the direction of a cathode 8, penetrate a membrane 9, and go into a concentration chamber 13. The metal ions are subjected to enrichment in cyclic concentrated water, and as time goes by, high enrichment factor and high removal efficiency can be obtained. The device can remove and enrich single heavy metal ion or mixed heavy metal ions in waste water continuously, and has advantages of low energy consumption, minimal environment pollution and the like.
Owner:TIANJIN POLYTECHNIC UNIV
Recycling method of waste acid from stainless steel acid washing process
The invention relates to a recycling method of waste acid from a stainless steel acid washing process, comprising the following steps of: (1) adding water soluble alkali in waste acid to adjust the pH to alkalescence and enable metal ions to generate hydroxide deposition; (2) filtering the hydroxide deposition by adopting a press filtering method, discharging filter cakes outside and collecting the filtrate; and (3) pumping the filtrate into a bipolar-membrane membrane stack, applying electrolysis voltage at the two ends of the membrane stack to generate mixed acid, alkali and dilute salt solution to be respectively discharged through different pipelines. The mixed acid obtained from the method can be reused in an acid washing process, and the alkali can be reused for neutralizing the waste acid in the step (1). Therefore, the invention can realize regeneration of waste acid and the recycling of the alkali, avoid reducing acid washing quality, keep the stable components of acid washing solution and improve the acid washing quality. The invention also has the characteristics of reducing the acid consumption for acid washing, reducing the discharge of acid liquor, reducing the production cost, improving the environment, enhancing the production efficiency and the like.
Owner:TONGJI UNIV +1
Solar photovoltaic power generation water treatment device
InactiveCN103193304AImprove power utilizationGuaranteed uptimeGeneral water supply conservationDispersed particle separationEngineeringSolar cell
The invention belongs to the technical field of membrane method water treatment equipment and relates to a solar photovoltaic power generation water treatment device. According to the device, an electrodialysis membrane stack and an electrodialysis water pump are connected and assembled in an electrical information manner to form an electrodialysis device; a solar cell is fixedly connected with a controller; electric energy generated by the solar cell is distributed through a controller; the controller is connected with a storage battery, an inverter and the electrodialysis membrane stake respectively in an electrical information manner; 25-35 percent of electric energy is transferred into the inverter, the inverter converts the electric energy into alternating current for the electrodialysis water pump, and the utilization rate of the electric energy converted by the inverter is 90 percent; 65-75 percent of electric energy directly acts on the electrodialysis membrane stack to supply power, and the utilization efficiency of the electric energy is 98 percent; and excessive electric energy is controlled and transmitted to the storage battery for storage so as to be used when the sunshine is insufficient. The device is simple in structure, convenient to use, high in electric energy utilization efficiency and sufficient in power supply and can be used for desalinization of seawater and brackish water and clean production of acid and base.
Owner:OCEAN UNIV OF CHINA
Device and method for preparing potassium sulphate
The invention provides a device for preparing potassium sulphate. The device comprises a membrane stack, a cathode, an anode, a first electrolyte sampling device, a second electrolyte sampling device, a first saline solution sampling device, a second saline solution sampling device, a third saline solution generation device, a fourth saline solution generation device and a power supply. The cathode is connected with the negative electrode of the power supply. The anode is connected with the positive electrode of the power supply. The cathode and the anode are arranged on the two sides of the membrane stack respectively. Six partition chambers including the cathode chamber, the anode chamber, the first salt chamber, the second salt chamber, the third salt chamber and the fourth salt chamber are formed in the membrane stack. According to the device for preparing potassium sulphate, ammonium sulfate serves as a supply source of sulfate ions, potassium chloride is converted into potassium sulphate, the whole process can be conducted at the normal temperature, the energy consumption is low, no strong corrosive substances are generated, and corrosion to devices is small. The process flow is simple, and the mechanization and automation are easy to achieve.
Owner:HEFEI UNIV OF TECH
Novel water treatment membrane stack
ActiveCN105413473ASmall footprintImprove pollutionSemi-permeable membranesMembranesEngineeringWater pipe
The invention discloses a novel water treatment membrane stack which includes a plurality of disk-type membrane sheets, a plurality of sealing rings, two fixing rings, and a water collecting tube. A mounting through hole, of which the diameter is matched with the outer diameter of the water collecting tube, is disposed in the center of each disk-type membrane sheet. The sealing rings are matched with the mounting through holes. A plurality of water outlet holes are formed in the water collecting tube. N disk-type membrane sheets and (N+1) sealing rings are arranged successively at interval, so that each disk-type membrane sheet is clamped between each two sealing rings, wherein the sealing rings are arranged correspondingly to the mounting through holes. The water collecting tube passes through the mounting through holes and inner rings of the sealing rings to connect all of the disk-type membrane sheets and the sealing rings in series. All of the disk-type membrane sheets and the sealing rings are fixed onto the water collecting tube by arranging the two fixing rings on the sealing rings at two ends respectively. By means of the disk-type membrane sheets which are assembled cylindrically in series, a structure that water enters through periphery and is discharged from the center is formed, thereby greatly reducing the occupied volume of the membrane stack on the basis of ensuring enough membrane contact area.
Owner:四川美峰环境治理有限责任公司
Device and method for processing sodium p-toluenesulfonate waste liquor
ActiveCN103787471ALower resistanceImprove conductivityWater contaminantsDispersed particle separationLiquid wasteHigh concentration
The invention relates to a device and method for processing sodium p-toluenesulfonate waste liquor. The device comprises a direct current power supply, a membrane stack, a clamping device, a carbon fiber felt electrode, an electrode liquor storage tank, an acid chamber storage tank, a waste liquor chamber storage tank, an alkali chamber storage tank, a liquor adjuster, an alkali chamber valve block, a waste liquor chamber valve block, an acid chamber valve block, an electrode chamber valve block, an acid chamber filled with a cation exchange resin, a salt chamber, an alkali chamber filled with an anion exchange resin, an anion exchange membrane, a cation exchange membrane and a bipolar membrane. A PAN (polyacrylonitrile)-based carbon fiber felt electrode used in the device and method has the characteristics of low resistance, good electric conductivity, oxidation resistance and corrosion resistance. The salt chamber is filled with a cation and anion mixed resin, and the acid chamber and the alkali chamber are respectively filled with the cation exchange resin and the anion exchange resin, so as to further improve the conductance of an electrodialysis cell, reduce the polarization and energy consumption, and lighten the membrane pollution. The device and method can be used for processing the production waste liquor of high-concentration hardly-degradable pentaerythritol triacrylate, so as to obtain acid and / or alkali and realize recycling of the waste liquor.
Owner:UNIV OF SCI & TECH BEIJING
Separator assembly
A novel separator assembly for a spiral flow reverse osmosis apparatus is provided. In one embodiment, the separator assembly comprises a central core element comprising at least one permeate exhaust conduit and at least one concentrate exhaust conduit. Each exhaust conduit defines an exhaust channel and one or more openings allowing fluid communication between an exterior surface of the exhaust conduit and the exhaust channel, said exhaust conduits independently defining a cavity between said conduits. The cavity is configured to accommodate a first portion of a membrane stack assembly comprising at least one feed carrier layer, at least one permeate carrier layer, and at least one membrane layer. A first portion of the membrane stack assembly is disposed within the cavity, and a second portion of the membrane stack assembly is wound around the central core element and forms a multilayer membrane assembly disposed around the central core element.
Owner:BL TECH INC
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