443 results about "Filtration membrane" patented technology

The present invention relates to a method for automated data processing to assess the state of multiple filtration membranes used in liquid filtration. The method involves receiving data from state sensors positioned within or near a set of membranes, which process incoming water into permeate and concentrate flows. This data, collected as time series at predefined frequencies, pertains to external physical parameters. An operating indicator is determined from this data, forming a second time series. Both the first and second time series are recorded as point clouds over a specified acquisition period. An intermediate operating indicator is generated, representing the state of new, clean, or cleaned membranes, using a learned normalization model. Finally, a normalized operating indicator is produced, characterizing membrane fouling and aging, independent of environmental variations, and forming a third time series. This method enhances the accuracy of membrane state assessment in filtration systems.

The present invention discloses a liquefied gas graded purification device, comprising a main pipeline, wherein a plurality of processing valves are connected in the main pipeline, wherein an elastic compression mechanism for maintaining an open state is provided in the processing valve, a hydrogen separation membrane is provided below the plurality of processing valves, and an output main pipeline is provided between the plurality of hydrogen separation membranes for connection, a switch valve body is provided on one side of the terminal processing valve, and a triggering control mechanism for gradually controlling the plurality of elastic compression mechanisms downward and the switch valve bodies to open from one side to the other is provided on the main pipeline. When the mixed gas enters the filter tube, it is provided with a plurality of filter cavities, which can realize multi-stage repeated filtration and achieve more accurate and stable filtration of the hydrogen in the mixed gas. At the same time, each filter cavity can be gradually pressurized to pressurize the mixed gas in each cavity, so that the hydrogen can better pass through the hydrogen filter membrane.

The invention provides a modified separation membrane as well as a preparation method and application thereof, the preparation method of the modified separation membrane comprises the following steps: obtaining a mixed system of a mineral aggregate and a polar solvent, performing ultrasonic liquid phase stripping on the mixed system to obtain a to-be-treated liquid, and the mass volume ratio of the mineral aggregate to the polar solvent is (50-100) mg: (30-60) ml; performing centrifugal treatment on the to-be-treated liquid, and collecting supernatant liquid to obtain nano suspension liquid; a cross-linking agent is mixed with the nano suspension to obtain modified liquid, the modified liquid contains the modified nanosheets, and the mass of the cross-linking agent is 2%-30% of the mass of the mineral aggregate; the modified liquid is filtered through a filter membrane, the modified nanosheets are evenly loaded on the surface of the filter membrane, and the modified separation membrane is prepared. The modified separation membrane prepared by the invention is a modified separation membrane material with high separation coefficient, high rejection rate and high flux, and has excellent performance.

Provided are a method for producing ultrapure water, an apparatus for producing ultrapure water, and a system for producing ultrapure water, with which it is possible to sufficiently reduce the number of fine particles such as iron and silica in ultrapure water without using complicated equipment and without significantly reducing the amount of produced water. A method for producing ultrapure water, which comprises filtration treatment using one or more filtration membranes selected from the group consisting of an ultrafiltration membrane (UF), a microfiltration membrane (MF), and an ion exchange membrane, said filtration treatment being performed under conditions satisfying (1) and (2) at the same time. (1) The permeated water flux during filtration is within the range of 0.5-2.0 times the optimal permeated water flux determined by the inter-membrane pressure difference / permeated water flux of the filtration membranes. (2) The water recovery rate in the filtration treatment is 50% or more but less than 80%.

The invention relates to the technical field of membrane filtration, and particularly discloses membrane filtration water treatment equipment which comprises a fixed base frame, a servo motor is fixedly installed on the right portion of the upper end of the fixed base frame, a rotating disc is fixedly installed on an output shaft of the servo motor, and clamping grooves are evenly formed in the rotating disc in an annular array mode. A third protective shell of the membrane filtration assembly is mounted in the clamping groove in a sliding manner; a membrane filtration assembly is slidably arranged in a clamping groove, a gear can drive a gear ring to operate under the action of a stepping motor, then the gear ring can drive a sealing plate to seal openings in the left sides of two adjacent partition plates, after sealing is completed, a filtration membrane between the two partition plates cannot operate, and therefore the membrane filtration assembly is prevented from being blocked. Maintenance personnel can easily pull out the filtering membrane to replace the filtering membrane by taking down the sealing sliding block, the whole equipment cannot be shut down in the replacement process, and the whole filtering efficiency is guaranteed.

A solid-liquid separation-type water treatment device capable of fluorescence detection. A motor (4) is fixedly connected to the center of the bottom of a transverse plate (1); a driving end of the motor (4) movably passes through the transverse plate (1) and is fixedly connected to a box body (41); a material suction mechanism (5) is mounted above the box body (41); a detection mechanism (6) is mounted at the front side of the box body (41); grooves (7) run through the interiors of a first stop plate (2) and a second stop plate (3); and two fixed pulleys (8) are fixedly connected to the top of each of the first stop plate (2) and the second stop plate (3). After a heavy metal in the box body (41) is precipitated, a clear liquid in the box body (41) can be continuously separated out by a filter membrane (595) by means of pressure filtration, in which case the clear liquid can be continuously pumped out by means of a water suction disc (593) so that the solid and the liquid in the box body (41) are separated, thereby improving the solid-liquid separation effect. Compared with conventional methods of pumping precipitates from the bottoms, this method avoids large-scale diffusion of the precipitate in the box body (41), can significantly reduce water pollution, and improves the cleanliness of pumped water resource.

The utility model relates to the technical field of laboratory supplies, in particular to a filter sample bottle, which comprises an outer tube and an inner tube, the inner pipe can be arranged in the outer pipe and can slide in the axial direction of the outer pipe, a stop part is arranged on the inner side wall of the inner pipe, a flow channel penetrating in the axial direction of the inner pipe is formed in the stop part, and an opening is formed in the end, away from the outer pipe, of the inner pipe; the filtering assembly is arranged in the inner pipe and comprises a filtering membrane and a pressing piece, and the pressing piece presses the filtering membrane on the side, in the axial direction of the inner pipe, of the stopping part; and the bottle cap is arranged on the opening and is used for opening and closing the opening. According to the scheme, the filter membrane is pressed in the inner tube through the pressing piece instead of welding, so that the detection result is prevented from being influenced by a plasticizer left in a filter sample bottle through welding. And the stopping part is arranged on the inner side wall of the inner pipe, so that the bottom end of the inner pipe is prevented from entering the outer pipe and being extruded by the outer pipe to deform, and the inner pipe is radially supported.

The invention discloses a filter membrane cleaning device, and relates to the technical field of filter membrane cleaning, the filter membrane cleaning device comprises a filter membrane cleaning device body, the filter membrane cleaning device body comprises a cleaning sleeve shell, and water source circulating filtering mechanisms are fixedly mounted on the outer surfaces of the two sides of the cleaning sleeve shell; filter membrane swinging and tensioning mechanisms are fixedly mounted on the inner wall surfaces of the two sides of the cleaning sleeve shell, and each filter membrane swinging and tensioning mechanism comprises a limiting swinging unit. A filter membrane penetrates through the polymerization drainage sleeve shell, extends into the inner side surface of the cleaning sleeve shell, and penetrates through the outer side surface of the oscillator, so that the filter membrane is conveyed, and the filter membrane is matched with the rotator to rotate the transmission leakage net crawler belt; the dust scraping hollow soft block on the outer side surface of the conveying leakage net crawler belt scrapes and cleans blocky or hard impurities on the surface of the filter membrane, and then the dust scraping hollow soft block is flexibly attached to the surface of the filter membrane through the elastic swing soft strip on the outer side surface of the lap joint fixing plate.

To provide an aqueous thinner waste liquid reuse system capable of producing a recycled thinner having slight bad odor and being capable of maintaining detergency.SOLUTION: An aqueous thinner waste liquid reuse system 1 according to the present invention comprises a circulation line 10, a filtration membrane module 21, and a recycled thinner forming unit 60. The circulation line 10 circulates an aqueous thinner waste liquid W1 including a coating component discharged from a coating booth. The filtration membrane module 21 is disposed on the circulation line 10 to separate the aqueous thinner waste liquid W1 into a condensed liquid W2 and a filtered liquid W3. The recycled thinner forming unit 60 stores the filtered liquid W3 permeating the filtration membrane module 21 and mixes the stored filtered liquid W3 with fresh thinner W4 to produce a reusable recycled thinner.SELECTED DRAWING: Figure 1

The utility model belongs to the field of water treatment and material separation, and provides a reversible cross-flow filtering membrane device, which comprises a membrane unit, a water outlet end interface, two circulation end interfaces, a first pipeline, a second pipeline, a second pipeline and a third pipeline, the membrane unit is provided with a water production end interface and two circulation end interfaces, the two circulation end interfaces are communicated through the first pipeline, the first pipeline is provided with a two-way liquid pumping assembly, and the flow direction of fluid can be changed through the two-way liquid pumping assembly; an outlet of the water inlet pump communicates with the first pipeline, and a check valve is arranged at the outlet of the water inlet pump; and the water producing tank is communicated with the water producing end interface through a second pipeline. According to the device, the two circulation end interfaces of the membrane unit are communicated through the first pipeline to form a circulation loop, and then the reversing of circulating water flow can be realized through the two-way liquid pumping assembly. By arranging a pressure sensor, a control system and the like, the circulation direction can be automatically switched according to pressure or timing, and bidirectional cross-flow filtration of the membrane unit is realized. The accumulation of pollutants on the surface of the membrane can be avoided, the risk of membrane pollution blockage and scaling is reduced, high flux can be maintained, the membrane washing frequency is reduced, and the operation cost is reduced.

To provide a membrane module which even persons poor in specialized knowledge and experience can easily remove and clean a filtration membrane as necessary and which is less likely to be broken by repeated attachment and detachment of the filtration membrane; and a membrane filtration device which has inexpensive production cost and an excellent maintenance property.SOLUTION: A membrane module 100 provided with a filtration membrane includes: a membrane fixing part 2 which fixes an end part 11 of a filtration membrane 1; a housing 3 which houses the filtration membrane 1; and a cap 4 which detachably fixes the housing 3. The housing 3 is detachably attached to the cap 4 in a screw type or a bayonet type. The membrane fixing part 2 and the filtration membrane 1 are detachable concomitantly with detachment of the housing 3. Detachment of the filtration membrane 1 and the membrane fixing part 2 from the housing 3 can make the filtration membrane 1 as a whole in an exposed state.SELECTED DRAWING: Figure 1

The present invention discloses a spin centrifugal filter. The rotating centrifugal device includes: a central axis, a partition plate provided radially inside a rotor structure, the partition plate dividing the inside of the rotor structure into a circulation drive part and a filtration drive part, the circulation drive part and the filtration drive part can independently or cooperatively drive the rotor structure to rotate to generate centrifugal force for centrifugal filtration of the fluid; a flow direction control core shaft that can be controllably moved along the axial direction is provided inside the central axis, and the flow ratio of the fluid entering the circulation drive part and the filtration drive part is changed by adjusting the position of the flow direction control core shaft relative to the central axis. The circulating flow of the fluid in the circulation drive part forms a continuous push on the rotor structure; when the filtration flow of the filter membrane decreases, the circulation drive part can still maintain the continuous high-speed rotation of the rotor structure, so that the rotational driving force of the rotor structure can be maintained, thereby avoiding the decrease in the centrifugal filtration effect.

The utility model relates to the field of water treatment, and discloses automatic membrane filtration water treatment equipment which comprises a treatment device main body, a water inlet is formed in the top of the treatment device main body, a drainage pipe is arranged at the bottom of one end of the treatment device main body, and a filtration membrane plate is obliquely arranged in the middle of an inner cavity of the treatment device main body. According to the automatic membrane filtration water treatment equipment, water is guided into the treatment device main body from the water inlet, the water penetrates through the notches and is filtered by the filtering membrane plate, meanwhile, a motor is started to be matched with a rotating shaft to drive a rotating roller, and the water is filtered by the filtering membrane plate; the conveying belt drives a plurality of scraping brushes which are in flexible extrusion with the filtering membrane plate to move, so that impurities left after filtering on the filtering membrane plate are automatically cleared and scraped into a collecting box for unified collection, and the problem that the water treatment efficiency is affected due to the fact that the filtered impurities are difficult to quickly discharge by existing treatment equipment is solved.

The filtration element (1) includes a filtration membrane (3) enclosed within a housing (2). The element has openings for removing filtrate and concentrate. A filter (11) is disposed within the element (1) at an opening (6) in the housing (2) for introducing feed into the interior volume (20) of the filtration element (11). Alternatively, the filter (11) may be positioned within an end cap (7) associated with such opening. Pre-filtration is thus performed within the filtration element 1 itself, rather than as a separate upstream operation. The presence of the filter (11) does not significantly increase the pressure drop across the filtration module. Flocculated particles and other debris that accumulate on the membrane can be easily removed by backwashing, despite the presence of the filter (11).

Spacers for filtration membranes that are formed from perforated films. The spacer include unperforated regions, which can serve as integrated lamination strips, advantageously omitting the need for separate lamination steps required with woven and nonwoven spacer fabrics while also providing a spacer with a uniform thickness.

The invention relates to a purification method comprising the following steps: forming a solution comprising a solute (70) and a supercritical fluid; then separating the solute from the supercritical fluid. The method further comprises, after the step of forming the solution, a step of moving a flow (74) comprising the solution; and the step of separating the solute from the supercritical fluid comprises: - passing the flow through a filtration membrane (34), the membrane comprising a filtration surface (46) arranged substantially vertically; - retaining the solute (70) on the filtration surface, with the supercritical fluid passing through the filtration membrane; and - moving, using gravity, the retained solute to a collection receptacle (50) arranged beneath the filtration surface.

The invention discloses a scale inhibition and concentrated solution residual pressure recycling type underground water purification device and method. The device comprises an emulsion water distribution pipeline formed by a scale inhibition device, a direct filter membrane, a self-cleaning filter, a precision filter, a security filter, a booster pump A, a reverse osmosis membrane and a desalting water tank which are sequentially connected in series through a pipeline; the other outlet of the reverse osmosis membrane is connected in series with a hydraulic turbine device through a pipeline to form a wastewater discharge pipeline; the booster pump A and the hydraulic turbine device are connected through a pipeline to form a branch; the emulsion water distribution pipeline is positioned at the tail end of the desalting water tank and is serially connected with a booster pump B; a special scale inhibition device is additionally arranged at the front end of a direct filter membrane to replace dosing for descaling, and pressure energy of concentrated liquid subjected to reverse osmosis treatment can be recycled by a hydraulic turbine device and is converted into mechanical energy to drag a booster pump at the front end of a reverse osmosis membrane, so that the energy consumption is reduced.

This invention provides an atomizing gas recovery device and an atomizing device, including a housing and a filter membrane within the housing. The housing includes a rear shell and a front shell. The front shell includes a front cover and an inhalation component. The front cover has a front shell positioning port, and the rear shell has an outlet and a rear shell mounting positioning port. The filter membrane is an annular sheet. The inhalation component passes through the front shell positioning port, the filter membrane, and the rear shell mounting positioning port. The inhalation component has an exhalation port and an exhalation one-way valve in its middle section, located inside the housing. The inlet at one end of the inhalation component's tube connects to the outlet of the atomizing device. The filter membrane is fitted onto the inhalation component between the exhalation port and the inlet, allowing exhaled gas to exit through the exhalation port, push open the exhalation one-way valve, pass through the filter membrane, and overflow from the outlet on the rear shell. The outlet of the atomizing device is connected to the inlet of the inhalation component. The design is reasonable, simple, and compact, with high aerosol transmission efficiency, facilitating the recovery of exhaled gas, and is easy to operate.

The invention belongs to the technical field of membranes, and particularly relates to an oil stain self-cleaning composite filtering membrane as well as a preparation method and application thereof. The oil stain self-cleaning composite filtering membrane provided by the invention comprises a polyvinylidene fluoride porous basement membrane, and CoFe2O4 (at) PDA composite nanoparticles are enriched on one side of the polyvinylidene fluoride porous basement membrane; the CoFe2O4-coated PDA composite nanoparticle has a core-shell structure, an inner core is a CoFe2O4 nanoparticle, and a shell layer coating the surface of the inner core is polydopamine; the surface of one side of the oil stain self-cleaning composite filtering membrane, which is enriched with the CoFe2O4 (at) PDA composite nanoparticles, is provided with an uneven rough structure. The oil stain self-cleaning composite filtering membrane has high-efficiency oil-water separation capability, stable anti-fouling performance and high-efficiency self-cleaning capability.

The utility model discloses a fibronectin purification device which comprises a sterile box, a filter box and a plurality of filter assemblies, and the filter box is arranged in the sterile box; the multiple filter assemblies are arranged in the filter box, each filter assembly comprises a supporting box, a filter membrane, a sliding control frame, a control rod and two membrane pressing mechanisms, and the supporting box is arranged in the filter box; the filtering membrane is arranged on the supporting box; the sliding control frame is slidably arranged in the supporting box. One end of the control rod is connected with the sliding control frame, and the other end of the control rod extends out of the filter box; the two film pressing mechanisms are arranged on the two sides of the supporting box correspondingly. One end of the membrane pressing mechanism penetrates through the supporting box and abuts against the sliding control frame, and the other end of the membrane pressing mechanism abuts against the filtering membrane in a pressing mode. Therefore, the filter membrane is simple in mounting mode and convenient to operate, so that the mounting efficiency of the filter membrane is improved.

The utility model relates to a disposable vacuum filter connected with a cover. The disposable vacuum filter comprises an upper container, a connector and a receiving bottle, a hinged cover body is arranged at the top of the upper container, and a filter membrane is arranged in the upper container and is hermetically connected with the connector through an inlay structure. A vacuum connecting port and a Luer taper are arranged on the side face of the connector, filter cotton is arranged in the connector to prevent foreign matter pollution, and a sealing gasket is arranged between the connector and a receiving bottle to prevent leakage. A plurality of stages of ribs are designed on the connecting seat to support the filter membrane and guide the sample liquid to flow into the receiving bottle. The outer side of the receiving bottle is provided with a concave surface and anti-slip lines, so that the holding is convenient and the slipping risk is reduced. The upper container is made of transparent materials, and the filtering volume can be observed conveniently through scale marks on the two sides. The design has the advantages that the pollution risk is reduced, various vacuum devices are adapted, the collapse of the filtering membrane is effectively prevented, and the filtering progress is easy to observe.

The utility model provides a high-efficiency automatic cleaning and anti-blocking device for an MBR (Membrane Bioreactor) membrane, which relates to the technical field of MBR membranes and comprises a filter assembly, the filtering assembly comprises a mounting frame, and a filtering membrane group is mounted in the mounting frame; an impurity cleaning assembly; the impurity cleaning assembly comprises an air inlet pipe connected to one end of the filtering membrane group, the top end of the air inlet pipe is fixedly connected with an air distribution pipe, the top end of the air distribution pipe is fixedly connected with an air supply pipe, and one end of the air supply pipe is fixedly connected with an air pump; by means of the design, it can be ensured that air is evenly distributed on the multiple air inlet pipes, then air is applied to the interior of the filtering membrane set, impurities on the outer surface of the filtering membrane set are cleaned under the action of air pressure, the problem that the cleaning effect is not ideal due to external washing in the cleaning process is solved, and meanwhile the cleaning effect is improved while the impurities on the surface of the membrane are cleaned through bubbles. The water pump sucks cleaning liquid and discharges the cleaning liquid out of the membrane surface, the cleaning effect is further enhanced, and poor filtering effect caused by sewage concentration is avoided.

The utility model relates to the technical field of high-purity oxygen preparation, and discloses a high-purity oxygen preparation device which comprises an air compressor, molecular sieve separation equipment and an absorption tube are fixedly installed on the outer wall of the air compressor respectively, and a drying box is fixedly installed on the outer wall of the molecular sieve separation equipment. And one end of a connecting pipe is fixedly mounted on the outer wall of the drying box, a storage tank is fixedly mounted at the other end of the connecting pipe, and a mounting shell is fixedly mounted on the outer wall of the absorption pipe. By pulling a transverse plate, the transverse plate drives a pull rod to move, the pull rod drives a lock pin to move, a first spring shrinks, at the moment, the lock pin moves to the inner wall of a mounting shell, then the lock pin is separated from the inner wall of a fixing block, the fixing relation of the fixing block disappears, the fixing block can move, and at the moment, the mounting plate is pulled upwards; further, the mounting plate drives the filtering membrane and the fixing block to be separated from the inner wall of the mounting shell, and the filtering membrane can be detached and replaced at the moment.

The invention discloses oil-removing and hole-forming equipment for a filter membrane and an oil-removing and hole-forming method thereof. The oil-removing and hole-forming equipment comprises an unwinding mechanism, an oil-removing and hole-forming mechanism and a winding mechanism which are sequentially arranged in the oil-removing and hole-forming direction, the oil-removing and pore-forming mechanism comprises a plurality of box bodies, a treatment cavity is formed in each box body, the adjacent treatment cavities are communicated with each other, and each treatment cavity is used for performing oil-removing and pore-forming treatment on the filter membrane; a plurality of driving assemblies are arranged in each treatment cavity, each driving assembly is connected with a driving source, and the plurality of driving assemblies are arranged in a staggered manner in the height direction so as to tension and support a filtering membrane passing through the driving assemblies, so that the filtering membrane forms a wave-shaped or S-shaped transmission path. The oil-removing and pore-forming device can be suitable for oil-removing and pore-forming treatment of the ultrathin filtering membrane.

The application discloses a preparation method of a heavy ion microporous composite filtration membrane and application thereof, and relates to the technical field of membrane separation preparation, wherein the preparation method comprises the following steps: step one, compounding a nuclear pore membrane on the upper side of a first base material; step two, preparing a casting solution, and then casting the casting solution on a second base material to form a nascent membrane after scraping; step three, performing a blowing operation on the nascent membrane to obtain a pre-phase separation membrane; step four, immersing the pre-phase separation membrane in a coagulation bath to perform a solidification operation, and obtaining a solidified membrane; step five, performing an area stretching operation on the solidified membrane, and then performing a cleaning operation in pure water, and then performing a drying operation after the cleaning operation to obtain a microfiltration membrane; and step six, compounding the microfiltration membrane on the upper side of the nuclear pore membrane to obtain a composite filtration membrane. The preparation method of the heavy ion microporous composite filtration membrane improves the liquid stopping effect, filtration flux and flux stability of the filtration membrane by compounding the first base material, the nuclear pore membrane and the microfiltration membrane.

The article to which this design relates is a membrane module having a filtration membrane element (e.g., hollow fiber membrane type, flat membrane type, etc.) inside, and used for industrial wastewater filtration, sewage filtration, pretreatment filtration for seawater desalination, etc.

The present invention relates to the technical field of membrane preparation, specifically a polytetrafluoroethylene composite filtration membrane and a preparation method thereof. In order to improve the service life of the filtration membrane, the present invention enhances the filtration membrane material in the form of a composite membrane formed by stacking a high-strength polytetrafluoroethylene filtration membrane and a polytetrafluoroethylene porous membrane; in the process of preparing the high-strength polytetrafluoroethylene filtration membrane, the present invention uses carbon nanotubes as a reinforcing material and conducts a modification treatment on it. After introducing long carbon chains and carbon-carbon double bonds on its surface, it reacts with vinyl fluoride, thereby generating a tetrafluoroethylene-like structure on the surface of the carbon nanotubes, improving the binding property and dispersibility between the carbon nanotubes and polytetrafluoroethylene; moreover, in order to improve the defect of the decrease in tensile properties caused by the introduction of carbon nanotubes in polytetrafluoroethylene, the present application also defines the membrane stretching process, effectively ensuring the strength and membrane flux of the polytetrafluoroethylene composite filtration membrane.

The utility model provides a kind of multistage filter membrane assembly, comprising: base, the base top is provided with multiple filter drums, each filter drum is fixedly communicated by connecting pipe, one filter drum top is fixedly communicated with water inlet pipe, one filter drum top is fixedly communicated with water outlet pipe, and multiple filter mechanisms are provided on filter drum;Multistage filter mechanism includes the sealing cover of screw connection in filter drum top, and filter cartridge is inserted in filter drum interior. Multiple filter drums are connected in series, different filter cartridges are provided in each filter drum, the solution is graded filtered, the filtering precision is high, and the filter drum can be replaced easily, the number of filter drum can be expanded according to needs, to further improve the precision of filtration, improve the purity of protease.