166 results about "Filtration membrane" patented technology

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.

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 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 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 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.

The application discloses a nano spider web composite ordered nanofiber air filtration membrane and a preparation method and application thereof. The filtration membrane comprises a multi-stage pore structure and is stable in structure, and is a composite ordered nanofiber membrane capable of completely filtering particulate matters and pathogenic microorganisms through physical interception. The application adopts a polymer solution as a spinning solution, and adopts an electrospinning technology to prepare an ordered nanofiber membrane, and then adopts an electrostatic spraying technology to composite a layer of nano spider web on the surface of the ordered nanofiber membrane. The application improves the filtration efficiency of the nanofiber membrane while ensuring a low pressure drop, and improves the filtration performance of the air filtration membrane.

The application relates to the technical field of filtering devices, and discloses a gasket set and a tangential flow filtering system, a first gasket, a second gasket and a third gasket, the first gasket being provided with a first through hole and a second through hole. The second gasket is provided with a third through hole and a fourth through hole. The third gasket is provided with a fifth through hole and a sixth through hole. The first gasket, the second gasket and the third gasket are sequentially arranged along a first direction. The gasket set is used for pasting a first tangential filtering membrane pack between the first gasket and the second gasket and pasting a second tangential filtering membrane pack between the second gasket and the third gasket, so that the first tangential filtering membrane pack and the second tangential filtering membrane pack can be connected in series. Compared with the structure of arranging a connecting pipeline between the first tangential filtering membrane pack and the second tangential filtering membrane pack, the structure is simpler and occupies less space.

The invention belongs to the technical field of medical instruments, and particularly relates to an infusion air supply device. The invention aims to provide an infusion air supply device which is composed of a compressed air storage tank, a soft air bag, a filter membrane, a puncture needle, a protective sleeve, a pipeline and a clamp, compressed sterile clean air is stored in the compressed air storage tank, and an air inlet device and a separated air inlet device on a disposable infusion apparatus (air inlet gravity infusion type) can be replaced. When the infusion air supply device is used, the easily-folded thin tube with the closed end, inserted into the soft air bag, on the compressed air storage tank is broken firstly, compressed sterile clean air is input into the soft air bag, an air inlet device on the disposable infusion apparatus (air inlet gravity infusion type) is closed by medical staff before infusion, then a puncture needle on the infusion air supply device is inserted into an infusion bottle, and then the infusion air supply device is closed. During infusion, a clip on a pipeline of the infusion air supply device is opened, and when the pressure of air in an infusion bottle is lower than the atmospheric pressure, sterile clean air in the soft air bag automatically enters an infusion system to be supplemented, so that closed normal gravity infusion is realized in the whole process, and adverse events of infusion can be reduced.

A production method for water for pure water includes adding polyaluminum chloride to raw water to produce first treated water, and filtering the first treated water in two or more stages including filtering with a filtration membrane device in a preceding stage to produce first concentrated water, and filtering the first concentrated water with a filtration membrane device in a subsequent stage. The water for pure water is produced as permeated water produced by the filtering in the two or more stages.

The invention aims to provide a general sampling device for pathological diagnosis, and relates to the technical field of medical instruments, tissues and stationary liquid can be sucked into a filter cartridge by pulling a pressurizing rod backwards, and then a filter is mounted on an outlet pipe; liquid in the filter cartridge can be pushed to the filter by pushing the pressurizing rod forwards, and fine flocculent tissues in the stationary liquid are filtered on a filter membrane of the filter and are extruded to be left in the outlet pipe, the extension pipe and the front end of the filter cartridge; when in use, the filter is detached, the push head of the push rod is slid to extend out of the push groove to push tissues in the front end of the filter cartridge out of the outlet pipe and the extension pipe, so that cylindrical tissue blocks are obtained, and the tissues can be completely collected, taken and subsequently embedded and sliced conveniently; the push rod slides to control the scraper to slide out of the piston head to be in contact with the front end of the filter cartridge to scrape the tissues remaining in the filter cartridge into the outlet pipe, so that the tissues are conveniently pushed out by the push rod and are prevented from being adhered to the front end of the filter cartridge.

A filter module that is excellent in maintaining the adsorbent powder deposition layer is provided. [Solution] The above problem is solved by a filter module 1 comprising a filtration membrane 2, a deposition layer 3 of adsorbent powder attached to the primary surface of the filtration membrane 2, a primary-side circulation layer 4 pressed against the primary surface of the deposition layer 3, a container 10 in which the filtration membrane 2, the deposition layer 3 and the primary-side circulation layer 4 are housed so as not to move, and a supply port 14 and a discharge port 15 provided in the container 10, wherein the treated fluid Fi supplied into the container 10 from the supply port 14 is circulated in this order through the primary-side circulation layer 4, the deposition layer 3 and the filtration membrane 2 until the entire amount is filtered, and then the treated fluid Fx is discharged out of the container 10 from the discharge port 15.

The utility model relates to filter membrane preparation equipment technical field, concretely to a kind of multilayer nanofiber filter membrane superposition assembly device, through the cooperative mechanism of layered precision membrane feeding, whole course tension control, multi-section superposition press and low-temperature heating fusion, the automation, high-precision superposition of different function nanofiber membrane is realized, rack is fixed base, and layered rotating groove of front end U type bearing frame is used to load nanofiber membrane roll of different function, at least three groups layered conveying module are vertically arranged along rack height, ensure that multilayer film material is synchronously conveyed to downstream. Guiding roller and lower roller of tension unit form tension adjusting structure, maintain film material tension stable, avoid tearing or wrinkle, first group of superposition platform preliminary press and eliminate interlayer gap, middle heating box provides low-temperature heating to promote interlayer nanofiber physical fusion, second group of superposition platform carries out secondary press, and strengthens interlayer bonding strength.

The present application relates to an unsupported, permanently hydrophilic filtration membrane, and its method of formation. The membrane comprises a polymeric matrix material and a cross-linked polyoxazoline hydrophilic additive blended throughout said matrix material.

The invention provides a short-range direct filter membrane for removing mine water suspended solids, a preparation method and a system, the preparation method is used for preparing printing slurry, and the printing slurry comprises hydrophilic light-cured resin and a nano hydrophilic modifier with positive electricity; carrying out integrated 3D printing by utilizing the printing slurry according to the designed model to generate a green filter membrane; the green filter membrane is provided with a plurality of vertical main pore channels penetrating through the green filter membrane; the green filter membrane is sequentially subjected to cleaning, curing post-treatment and plasma surface modification treatment, and the short-range direct filter membrane is obtained; the surface Zeta potential of the short-range direct filtration membrane is 5-15mV, and the contact angle between the short-range direct filtration membrane and water is less than 10 degrees. The invention solves the problems of easy pollution, low flux, complex pretreatment and the like of the traditional filter membrane, is suitable for short-range direct filtration treatment of high-suspended-matter mine water (less than or equal to 2000mg / L), and realizes low-cost, efficient and energy-saving operation.

The utility model relates to the field of water treatment devices, in particular to an integrated reverse osmosis device which comprises a base, a module system, a membrane seat, a scale inhibitor dosing system, a membrane cleaning device, an automatic control system, a water inlet filter, a water inlet high-pressure pump set, a reducing agent dosing system and a pipe valve system, and when the membrane pollution reaches a certain degree, the control system circularly cleans the membrane, and the online detection instrument concentrates various models to the automatic control system so as to realize full-automatic control and realize the target of unmanned management.

The present disclosure relates to a process for testing the integrity of membranes in a filter module. Specifically, the process is applied to filters for extracorporeal blood treatment, in particular, filters comprising both filter membranes and particulate material.

The application belongs to the technical field of membranes, and particularly relates to an oil stain self-cleaning composite filtration membrane and a preparation method and application thereof. The oil stain self-cleaning composite filtration membrane provided by the application comprises a polyvinylidene fluoride porous base membrane, one side of the polyvinylidene fluoride porous base membrane is enriched with CoFe2O4@PDA composite nanoparticles; the CoFe2O4@PDA composite nanoparticles have a core-shell structure, the inner core is CoFe2O4 nanoparticles, and the shell layer coated on the surface of the inner core is polydopamine; and the oil stain self-cleaning composite filtration membrane has a rough structure with unevenness on the surface of the side enriched with the CoFe2O4@PDA composite nanoparticles. The oil stain self-cleaning composite filtration membrane has high efficient oil-water separation capacity, stable anti-pollution performance and high efficient self-cleaning capacity.

The utility model relates to the technical field of pressure filtration, in particular to pressure filtration equipment based on a filter membrane, which comprises a filter cartridge, an extrusion cartridge is communicated with the bottom of the filter cartridge, and a sealing plug driven by an air cylinder is slidably sealed in an inner cavity of the extrusion cartridge. According to the pressure filtration equipment based on the filter membrane, efficient and continuous filtration is achieved, continuous operation of filtration and cleaning is achieved through dynamic switching of the filter membrane assembly and alternate use of the compression-resistant pieces, shutdown cleaning is not needed, the production efficiency is remarkably improved, and automatic cleaning and deslagging are achieved; automatic residue scraping, high-pressure flushing and waste water discharging are achieved, manual intervention is thoroughly avoided, the sealing stability is high, dynamic sealing is kept during filter membrane switching through the matched design of a lifting pressing ring and an elastic connecting belt, and pressure leakage is prevented; the compression-resistant sheet enhances the structural rigidity, and sealing failure caused by deformation under high pressure is avoided.

The invention discloses compact integrated sewage treatment equipment based on a coupled MBR membrane, and belongs to the technical field of sewage treatment.The compact integrated sewage treatment equipment comprises a treatment pond, the bottom in the treatment pond is fixedly connected with an aeration device through a supporting rod, and a plurality of membrane filtering mechanisms are arranged above the aeration device; each group of membrane filtration mechanism is fixedly clamped with the inner wall of the treatment pond through a group of clamping pieces, the plurality of groups of membrane filtration mechanisms are jointly communicated with a water suction pump through a water suction pipe, the water suction pump is fixedly connected with the outer wall of the treatment pond, and a water outlet of the water suction pump is fixedly communicated with a drainage pipe; according to the invention, the membrane filtration mechanism is mounted in a lap joint manner, so that the replacement convenience of a filtration membrane assembly can be effectively improved, the surface cleaning effect of membrane filaments can be effectively improved through ultrasonic oscillation, and the filtration efficiency of the membrane filaments is further improved.

The utility model relates to a kind of split type membrane filter, including filter piece and sample container;Sample container is formed with container cavity in it, and container nozzle is provided on sample container, and container nozzle is used for sample liquid to enter and exit container cavity;Filter piece is provided with filter cavity in it, and the bottom of filter piece is provided with water outlet hole communicated with filter cavity, filter membrane is provided in filter cavity, and filter membrane is used to filter liquid from filter cavity to water outlet hole;Interface is provided on filter piece and is communicated with filter cavity, and interface is suitable for detachably connected with container nozzle;When container nozzle is connected with interface, sample container is connected with filter piece as a whole, and container cavity is communicated with filter cavity by the channel formed by the connection of container nozzle and interface.The utility model can sample and transport sample liquid by sample container, and it is beneficial to the popularization of membrane filtration method.The utility model reduces the restriction to the size of filter piece, which helps to reduce the manufacturing cost, storage cost and transportation cost of filter piece.

The infusion apparatus structure comprises a puncture needle, an infusion hose, a drip chamber, an adjusting valve, a filter and a needle head, the puncture needle and the needle head are installed at the two ends of the infusion hose, and the drip chamber, the adjusting valve and the filter are sequentially connected in series through the infusion hose. A liquid inlet connector and a liquid outlet connector which are connected with an infusion hose are arranged at the upper end and the lower end of the filter respectively, the interior of the filter is composed of an inner cavity and an outer cavity, the two cavities are separated through a spherical structure composed of a filtering film and a breathable film, and the outer cavity of the filter is divided into a lower liquid cavity and an exhaust cavity through a separation block. A floating ball is mounted in an inner cavity formed by the filtering membrane and the breathable membrane in the filter, and the infusion hose is in sealed connection with the liquid inlet connector; by arranging the filter of a special structure, bubbles and large solid particles in liquid medicine can be filtered and eliminated, meanwhile, the internal bubbles can be automatically discharged, and potential safety hazards possibly occurring in the infusion process are eliminated.

The utility model relates to the technical field of filtering membranes, in particular to an efficient filtering membrane device. The high-efficiency filtering membrane device provided by the utility model solves the technical problem that dirt is easy to adhere to the surface of a filtering membrane in the prior art. The utility model discloses an efficient filtering membrane device which comprises a shell, the filter membrane assembly is arranged in the shell, the filter membrane assembly filters a medium and a support flowing through the shell, the filter part of the filter membrane assembly is arranged to be conical, the tip end of the filter part faces the inlet, in the actual application process, the medium enters the shell from the inlet, and the filter membrane assembly is arranged in the shell to filter the medium and the support flowing through the shell. The medium entering the shell directly washes the filtering part, so that dirt attached to the surface of the filtering part is flushed into the dirt accumulation groove, or the dirt attached to the surface of the filtering part is accumulated at the lower end of the filtering part. The dirt is not easy to attach to the side surface of the filtering part, so that the filtering part has good filtering performance and higher filtering efficiency.

To provide a membrane filtration apparatus which can be backwashed without using a dedicated pump, and a method for washing a filtration membrane.SOLUTION: In a membrane filtration device 100, a membrane module is constituted of a plurality of membrane modules 1, 1', and the membrane modules 1, 1' are provided with filtration membranes 14, 14'. for filtering water to be treated, water to be treated inflow parts 11, 11' for allowing the water to be treated to flow in, treated water discharge parts 12, 12' for discharging treated water filtered by the filtration membranes 14, 14'., and impurity substance discharge parts for discharging impurity substances removed when cleaning the filtration membranes 14, 14'., which also serve as the water to be treated inflow parts 11, 11'. The treated water passed through one membrane module 1 is sent into the other membrane module 1' without being stored to wash the filter membrane of the other membrane module 1' and the treated water passed through the other membrane module 1' is sent into one membrane module 1 without being stored to wash the filter membrane of one membrane module 1.SELECTED DRAWING: Figure 1

[Problem] To provide a filter module excellent in maintainability of a deposition layer of adsorbent powder. [Solution] The problem is solved by a filter module 1 including: a filtration membrane 2; a deposition layer 3 of adsorbent powder attached to a primary-side surface of the filtration membrane 2; a primary-side circulation layer 4 pressed against a primary-side surface of the deposition layer 3; a container 10 in which the filtration membrane 2, the deposition layer 3, and the primary-side circulation layer 4 are housed so as not to move; and a supply port 14 and a discharge port 15 provided in the container 10, wherein a fluid Fi to be processed supplied from the supply port 14 into the container 10 passes through the primary-side circulation layer 4, the deposition layer 3, and the filtration membrane 2 in this order such that the entire volume of the fluid Fi to be processed is filtered, and then a processed fluid Fx is discharged from the discharge port 15 to the outside of the container 10.

The invention relates to the technical field of filtering membranes, and discloses an array type flat sheet membrane and a preparation method thereof.The array type flat sheet membrane comprises two layers of filtering membranes symmetrically arranged up and down and a supporting membrane located between the two layers of filtering membranes; the filtering membrane and the supporting membrane continuously extend along the length direction of the membrane and are combined to form a plurality of long and narrow pipe cavities which extend along the length direction and are distributed along the width direction of the membrane in an array manner; a combination area extending in the length direction of the membrane is arranged between every two adjacent long and narrow pipe cavities, the combination areas are formed by attaching the filtering membrane and the supporting membrane after heat bonding treatment, sewing structures extending in the length direction of the membrane are arranged in the combination areas, and adhesive media are attached to the surfaces of the sewing structures. And the adhesive medium is filled in a needle hole formed by the sewing structure and is adhered to the filtering membrane and the supporting membrane, so that a composite reinforcing structure is formed in the bonding area.

The utility model discloses a conductive microsphere preparation pretreatment integrated device which comprises a reaction kettle which comprises a top cover and a kettle body; a filter membrane is arranged in the reaction kettle, the bottom of the reaction kettle is communicated with the infusion pump through a pipeline, and an outlet valve is arranged on the pipeline. According to the utility model, the top cover is correspondingly provided with the stirring port, the ultrasonic port and the feeding port, multi-step pretreatment operations such as pretreatment, sensitization and activation can be uniformly carried out in the kettle body, waste liquid is uniformly pumped out by the infusion pump through the pipeline at the bottom after treatment is finished, and microspheres are retained on the filtering membrane in the kettle body, so that the treatment efficiency is effectively improved; and the sample loss rate is reduced.

The utility model provides a tubular microfiltration membrane and a reaction tank. According to the micro-filtration membrane, the spiral guide sheets are arranged in the membrane tube main body to guide the tubular bundling separation membrane to spirally extend, so that a rotational flow effect is formed to break through a traditional straight-through flow channel mode, the turbulence degree of fluid is enhanced, and concentration polarization is reduced. The split type design is adopted in the structure, an upper shell and a lower shell are welded and formed, end covers at the two ends are assembled with connecting grooves through clamping blocks, a rubber plate with holes fixes a film bundle through holes, clamping grooves in the edges of the rubber plate are embedded into grooves of guide pieces to prevent flow channel bias flow, and an additionally-arranged axial flow disturbing rod and a spiral flow channel cooperate to generate multi-stage eddy currents to strengthen boundary layer disturbance. The composite supporting structure is composed of a stainless steel wire net and a gradient pore ceramic frame, the outer net improves the mechanical strength, the inner layer ceramic frame adopts 35-60% radial gradient pore distribution to achieve progressive throttling, the transmembrane pressure difference is optimized, and membrane wires are protected.