581 results about "Filtration membrane" patented technology

The utility model discloses a quick graded filtering device for fermentation liquor, which belongs to the technical field of fermentation liquor filtering and comprises a stock solution tank, the bottom of the stock solution tank is connected with one end of a first liquid guide pipe, the other end of the first liquid guide pipe is connected with the input end of a graded filtering module, and a feeding pump and a first feeding valve are arranged on the first liquid guide pipe. The output end of the grading filtering module is connected with one end of the second liquid guide pipe, and the other end of the second liquid guide pipe is connected with the sterile liquid storage tank; when the device starts to work, a first feeding valve and a feeding pump are opened, fermentation liquor in a stock solution tank is introduced into a grading filtering module through a first liquid guide pipe, and the fermentation liquor subjected to grading filtering through the grading filtering module enters a sterile liquid storage tank to be stored through a second liquid guide pipe; the device can effectively overcome the defects of low efficiency, poor separation effect, easiness in blockage of a filter membrane, time and labor waste and the like through methods of graded filtration, cross-flow filtration and the like, does not need to be matched with a centrifugal machine, treats in one step, and lays a foundation for producing sterile products.

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 invention relates to the field of filtering equipment, in particular to a multi-channel needle type filtering device which comprises a workbench, an electric lifting rod is arranged at the upper end of the workbench, a needle cylinder frame is arranged at the top end of the electric lifting rod, a plurality of positioning cavity cylinders are arranged on the needle cylinder frame at equal intervals in a penetrating mode, and needle cylinder filters are erected in the positioning cavity cylinders. A plurality of mounting grooves are formed in the upper end of the workbench at equal intervals, container bottles are arranged in the mounting grooves and located under the corresponding needle cylinder filters, each needle cylinder filter comprises a needle cylinder body, a sealing seat and a needle head, a piston is slidably arranged in each needle cylinder body, a pressing column is fixedly arranged at the top end of each piston, and a connecting seat is arranged at the bottom of each needle cylinder body; and the sealing seat is hermetically sleeved on the outer side of the connecting seat. According to the ion filtering device, the corresponding filtering membranes can be quickly replaced according to different filtered ion particles, the filtering process of different ions can be synchronously realized on the same equipment, the operation is simple, and the filtering effect is good.

A printed porous structure (500) fabricated using a multi-step absorption, MSA, process, said printed porous structure (500) comprising a support layer (520) that supports a filtration membrane (510), wherein said support layer (520) and said filtration membrane (510) are integrally formed.

The double-layer liquid medicine filter comprises a first cover body and a second cover body, a base is connected between the first cover body and the second cover body, a first film placing ring and a second film placing ring are fixedly arranged in the axis direction of an inner cavity of the base, and the first film placing ring and the second film placing ring are the same in structure and are oppositely arranged. A first filtering membrane is arranged in the direction, close to the first cover body, of the first membrane placing ring, a second filtering membrane is arranged in the direction, close to the second cover body, of the second membrane placing ring, a liquid inlet cavity is formed between the first filtering membrane and the second filtering membrane, a liquid inlet is formed in the direction, facing the liquid inlet cavity, of the liquid inlet end, and a splitter plate abutting against the liquid inlet is fixed to the inner wall of the liquid inlet cavity; and an inclined flow guide frame fixedly connected with the inner wall of the liquid inlet cavity is connected to the flow distribution plate in the direction towards the liquid outlet end. According to the utility model, the utilization rate of the filtering membranes on the two sides can be improved, the filtering area of liquid medicine in unit time can be increased by the two layers of filtering membranes, the filtering membranes can be effectively prevented from being blocked, the flow direction of the liquid medicine can be effectively guided, and bubbles can be effectively prevented from being generated.

A filtration membrane including a first layer comprising a polyester terephthalate nonwoven fabric, a second layer comprising a polyvinylidene fluoride matrix doped with a polyvinylpyrrolidone and titanium dioxide nanoparticles, and a third layer comprising a polypyrrole polymer. A method of making the membrane is also described. The membrane of the present disclosure is self-cleaning under visible light irradiation conditions.

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.

A peritoneal dialysis (“PD”) system (10) including a PD machine (20); a patient line (50) extending from the PD machine (20); and a filter set (100) in fluid communication with the patient line (50), the filter set (100) including a filter body (110, 150, 190) housing first and second filter membranes (112a, 112b, such as a sterilizing grade or bacteria reduction filter membranes), the filter body (110, 150, 190) configured to be placed in different arrangements such that fresh PD fluid (i) flows through the first filter membrane (112a) and then through the second filter membrane (112b) or (ii) splits and flows through first and second filter membranes (112a, 112b) in parallel.

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.

The invention belongs to the field of preparation of a titanium-based material titanium tetrachloride for an integrated circuit, and relates to a method for removing trace impurities of electronic-grade chemicals, in particular to a method for preparing ultrapure titanium tetrachloride through membrane filtration and adsorption, which comprises the following steps: S1, performing ultrasonic treatment on a microfiltration membrane in ultrapure water to obtain an ultrapure microfiltration membrane; s2, flatly placing the ultra-pure micro-filtration membrane in a drying oven for drying, and removing internal moisture; and S3, enabling the titanium tetrachloride stock solution to penetrate through the dried ultra-pure micro-filtration membrane under pressure driving, so as to prepare the ultra-pure titanium tetrachloride. The method can efficiently adsorb trace metal impurities in titanium tetrachloride, and the whole filtration and adsorption process has the advantages of being simple and convenient to operate, mild in condition, high in removal efficiency, environmentally friendly and the like.

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.

The atomized gas recovery device comprises a shell and a filter membrane in the shell, the shell comprises a rear shell and a front shell, and the atomized gas recovery device is characterized in that the front shell comprises a front shell cover and a suction component, a front shell positioning opening is formed in the front shell cover, a gas outlet and a rear shell mounting positioning opening are formed in the rear shell, the filter membrane is an annular piece, and the suction component is arranged in the annular piece. And the suction component penetrates through the front shell positioning opening, the filtering membrane and the rear shell mounting positioning opening. An expiration port and an expiration one-way valve are arranged in the middle of a tube body of the inhalation component, a mist inlet located in the shell and at one end of the tube body of the inhalation component is used for being connected with a mist outlet of an atomization device, and the portion, between the expiration port and the mist inlet, of the inhalation component is sleeved with the filter membrane, so that expired gas pushes away the expiration one-way valve after coming out of the expiration port, and the atomization device is used for atomization. And after being filtered by the filter membrane, the air overflows from the air outlet on the rear shell. A mist outlet of the atomization device is connected with a mist inlet of the suction component. And the structure design is reasonable, simple and compact, the aerosol transmission efficiency is high, recovery of exhaled gas is facilitated, and operation and use are convenient.

The invention provides a quantitative tangential flow filtering system without a stirring pipeline, which comprises a product tank, a bottom outlet of the product tank is connected with a liquid inlet main pipeline through a pipeline, a circulating pump is arranged on the liquid inlet main pipeline, and an outlet end of the liquid inlet main pipeline is connected with a liquid inlet end of a tangential flow filtering membrane bag. A backflow end of the tangential flow filtering membrane bag is connected with a liquid outlet main pipeline, the liquid outlet main pipeline is connected with a liquid inlet end of a tubular container, a liquid outlet end of the tubular container is respectively connected with the liquid inlet main pipeline and a collection end through pipelines, and a permeation end of the tangential flow filtering membrane bag is connected with a liquid discharge pipeline; during use, the tubular container replaces a product tank to serve as a part of functions of a circulation tank, and meanwhile reverse mixing of the circulation tank is brought about; the membrane has the advantages that the flux of the membrane is improved, and concentration and re-filtration can be completed more quickly.

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 invention provides a sewage nitrogen and phosphorus removal system and a control method thereof. The sewage nitrogen and phosphorus removal system is provided with a water inlet and a water outlet, and further comprises an anaerobic tank, a front anoxic tank, an aerobic tank, a rear anoxic tank and a vibration filtering membrane tank which are communicated in sequence. The anaerobic tank is communicated with the water inlet, and the vibration filtering membrane tank is communicated with the water outlet. A first return pipeline communicated with each other is arranged between the vibration filtering membrane tank and the front anoxic tank, a second return pipeline communicated with each other is arranged between the aerobic tank and the front anoxic tank, and a third return pipeline communicated with each other is also arranged between the front anoxic tank and the anaerobic tank. The controller can control the actual reflux ratio of the first reflux pipeline to be 200%-300%, the actual reflux ratio of the second reflux pipeline to be 50%-600% and the actual reflux ratio of the third reflux pipeline to be 50%-100%. According to the application, the controller is used for automatically controlling the reflux ratio of each reflux pipeline to be within the range, so that the environmental balance of the anaerobic tank and the front anoxic tank can be maintained, and the nitrogen and phosphorus removal effect of sewage can be improved to reach the first-grade A discharge standard.

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.

A filtration membrane includes stainless-steel mesh fibers, copper, and silver. The copper and the silver coat the stainless-steel mesh fibers. The silver is the outermost layer, which covers the copper. The silver is in the form of a layer of dendritic growths in the form of branched dendritic leaves. The branched dendritic leaves are 3 to 30 μm long. A method for oil and water separation using the filtration membrane is also provided.

Filtration membrane with improved mechanical stability and increased resistance to pressure is provided. The filtration membrane is useful for in vivo implantable filtration devices, such as, an artificial kidney. In vivo implantable filtration devices are also provided.