18results about How to "Small filter resistance" patented technology

The application relates to the technical field of high-solid acrylic resin, in particular to a high-solid acrylic resin production impurity removal device, which comprises a fine filter tank and a filtering assembly arranged in the fine filter tank, the fine filter tank is provided with a fine filter feeding pipe, a fine filter discharging pipe and a blowdown pipe, the filtering assembly comprises a fixed column, a plurality of rotary fine filter cartridges and a plurality of scraping plates, the plurality of rotary fine filter cartridges are distributed in a circumferential array around the axis of the fixed column and are driven to rotate around the axes thereof, the scraping plates are fixed on the fixed column, the plate surfaces of the scraping plates are in close contact with the outer walls of the rotary fine filter cartridges, the fine filter feeding pipe is used for guiding the resin to be filtered into the fine filter tank, the fine filter discharging pipe is in communication with the inner cavities of all the rotary fine filter cartridges and is used for guiding the filtrate to be discharged, and the device further comprises a preheating coarse filter tank and a conveying pipe. The application aims at solving the problem that the filter screen is prone to blockage in the prior art.

The invention belongs to the field of separation and filtration, and particularly relates to a filtering membrane with aperture sizes in gradient arrangement and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a membrane casting solution: mixing and dissolving dimethylacetamide, polyether sulfone, polyethylene glycol and an auxiliary agent, and defoaming to obtain the membrane casting solution; (2) preparing core liquid: mixing dimethylacetamide with water to obtain the core liquid; (3) preparing a gel bath: mixing dimethylacetamide with water to obtain the gel bath; the concentration of the gel bath is smaller than that of the core liquid; and (4) preparing the filter membrane: enabling the membrane casting solution to be in contact with the core solution and the gel bath through a spinneret plate, and enabling membrane filaments to pass through the gel bath to a filament collecting tank, so as to obtain the filter membrane of which the pore sizes are arranged in a gradient manner. The pore diameter of the filtering membrane is changed from a large pore diameter on one side to a small pore diameter on the other side in a gradient manner, and the filtering membrane has high retention rate and high flux, high mechanical strength, easy cleaning and low energy consumption.

This utility model provides a tap water floc separator, relating to the field of tap water treatment technology. The device includes a base, a mixing tank, a filter tank, and a chemical storage tank. The top plate of the mixing tank is provided with a first water inlet and a chemical inlet. The first water inlet is used to connect to the tap water pipe, and the chemical inlet is used to connect to the chemical storage tank. The bottom plate of the mixing tank is provided with a first water outlet, and a water pump is installed on the first water outlet. The top plate of the filter tank is provided with a second water inlet, and the output end of the water pump is connected to the second water inlet through a connecting pipe. The bottom plate of the filter tank is provided with a second water outlet and a third water outlet. An annular filter screen is provided inside the filter tank. The second water inlet and the third water outlet are located inside the filter screen, and the second water outlet is located between the filter screen and the filter tank body. A cleaning component is provided inside the filter tank to remove flocs on the water-facing side of the filter screen, preventing accumulation and ensuring that the filter screen can maintain good filtration performance, thereby improving filtration efficiency and quality.

The invention relates to the technical field of aluminum alloy semi-solid processing, and provides a semi-solid slurry flow guide device for aluminum alloy, which comprises a shell, the bottom of the shell is fixedly connected with a rack, one end of the shell is fixedly connected with a feeding pipe, the other end of the shell is fixedly connected with a discharging pipe, and a material shifting mechanism is arranged at one end, close to the feeding pipe, of the inner side of the shell. The material stirring mechanism comprises two rotating plates which are arranged in parallel, a plurality of material stirring plates are fixedly connected between the two rotating plates, a plurality of electric heating pipes are arranged between every two adjacent material stirring plates, a first support is fixedly connected to the outer side of the rack, and a first motor is fixedly installed at the top of the first support; a flow guide mechanism is rotationally connected to the middle of the inner side of the shell, a filter screen is fixedly connected to the end, close to the discharging pipe, of the inner side of the shell, a stirring mechanism is arranged on one side of the filter screen, and a cleaning mechanism is arranged on the other side of the filter screen. Through the innovative mechanism design, the key problem in the aluminum alloy semi-solid slurry diversion process is solved.

A method for dynamically capturing PM2.5 and bacteria by using magnetically controlled magnetic sterilization porous medium, a sandwich structure medium with magnetic, porous and sterilization functions is prepared by using a magnetically controlled pulse electrodeposition method. The magnetic sterilization porous particles are used as filter materials in a dynamic capture device, the filter materials are controlled by the magnetization force generated by the electromagnet and the centrifugal force generated by the channel rotation, the magnetic field strength and the rotation speed are changed, the magnetic sterilization porous particles achieve dynamic balance and oscillate along the force direction; in the inlet direction, the filter materials are controlled by the drag force of the airflow and the gravity, and are suspended in the channel; the suspended and oscillated magnetic sterilization porous particle filter materials dynamically capture PM2.5 and sterilize the bacteria attached to PM2.5. The centrifugal force and the magnetization force cooperatively control the suspended and oscillated filter materials to improve the meeting probability with the pollutants in the air, the filter materials have the characteristics of smaller filtration resistance, higher efficiency, sterilization function, low noise, large air processing amount per unit time and low energy consumption.

The utility model discloses a wrinkled filter medium with M-shaped grooves, which comprises groove-shaped filter paper and plane filter paper adhered to the lower surface of the groove-shaped filter paper, the section of the groove-shaped filter paper is wave-shaped, and a plurality of air inlet channels are enclosed between the plane filter paper and the lower surface of the groove-shaped filter paper; when the corrugated filter medium forms the filter element in a winding or stacking mode, air outlet channels are defined between the upper surface of the groove-shaped filter paper and the plane filter paper above the groove-shaped filter paper, the air outlet channels and the air inlet channels are alternately arranged, the extending direction of the air outlet channels and the air inlet channels is the front-back direction, and the air outlet end is the front direction. The shapes and the sizes of the sections of the air outlet channel and the air inlet channel are kept unchanged in the front-back direction; the sectional area of the air inlet channel is larger than that of the air outlet channel. The air inlet channel is in an M shape or a double-M shape. The utility model further discloses a corresponding production line. Under the condition that the integral volume of the air inlet channel and the air outlet channel is not changed, the volume of the air inlet channel is increased, so that the dust holding capacity of the air inlet channel is improved, the filter resistance is increased less when the same amount of dust is held, and the service life of the filter element adopting the air inlet channel is prolonged.

This invention discloses a filtration method and system for solid-liquid two-phase flow. The method includes: S100, employing a filter frame with an opening at the top, the filter frame having a bottom filter section and a side filter section, the side filter section surrounding the bottom filter section; S200, a two-phase flow is introduced into the filter frame through the corresponding opening of a two-phase flow input device, and during the filtration process, a filter cake layer is formed in the filter cake accumulation area above the bottom filter section and within the side filter section, the introduced two-phase flow directly impacts the filter cake layer for filtration; and S300, when the thickness of the filter cake layer on the bottom filter section increases to the point where the filtration process cannot be completed smoothly, the two-phase flow continues to be filtered through the side filter section on the top side of the filter cake layer. The solid-liquid two-phase flow filtration method and system of this invention adopts the concept of filter layer disturbance filtration. By impacting the filter cake layer with the two-phase flow, the filter cake layer is continuously disturbed during the filtration process, resulting in a smaller filter cake layer density than that formed in a typical filtration process, thereby improving filtration efficiency and filtration quality.

This invention relates to the field of papermaking technology, specifically to a high charge density composite retention and filtration aid, its preparation method, and its application. The invention uses montmorillonite as raw material, acidifying it with sulfuric acid and then treating it with 3-mercaptopropyltrimethoxysilane to obtain modified montmorillonite; subsequently, it is mixed with acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, and 10-undecenal, and polymerized under nitrogen atmosphere using sodium persulfate as an initiator to prepare polymer-modified montmorillonite powder; using linear corn starch as raw material, it is gelatinized and reacted with 3-chloro-2-hydroxypropyltrimethylammonium chloride to obtain cationic starch; the cationic starch is then compounded with polymer-modified montmorillonite to obtain a high charge density composite retention and filtration aid.

The application discloses a monolithic structure ceramic filter plate for low-grade iron concentrate dewatering and a preparation method thereof, and belongs to the technical field of ceramic filter plates.The application is characterized in that: a ceramic 3D printing material is prepared, and a double-head double-precision 3D printer is used to layer-by-layer print a monolithic structure ceramic filter plate base body; the base body mud blank is dried and fired, coated and fired again, and then a water outlet nozzle and a positioning hole are installed to obtain the monolithic structure ceramic filter plate for low-grade iron concentrate dewatering.The application reduces the surface roughness of the monolithic structure ceramic filter plate, improves the corrosion resistance and service life; the 3D printing technology is used to make the inner cavity of the monolithic structure ceramic filter plate have better symmetry, reduce the corrosion and damage caused by the too thin side of the filter plate, and the unique inner cavity column design has higher water flux under the premise of ensuring the strength of the base body, and the resistance caused by the reduction of the micro-pore diameter is compensated.

The application discloses a kind of preparation methods of multifunctional fiber membrane based on multi-level hole limited dispersion, belong to membrane material preparation technical field.The application designs and prepares multi-level hole fiber membrane using electrospinning technology, and by regulating spinning solution component and spinning parameter, the controllable adjustment preparation of multi-level hole structure can be realized.Based on the space limited system of hole structure, high dispersity Pt cluster is constructed in fiber channel using atomic layer deposition technology, and multifunctional fiber membrane is constructed.The multifunctional fiber membrane prepared in the application can simultaneously realize the efficient low-resistance interception of particulate matter in indoor air and the complete catalytic removal of low-concentration formaldehyde, and provides reliable technical support for developing high-performance multifunctional membrane materials.

The invention relates to the technical field of synthetic fibers, and particularly discloses a nylon 66 fiber for filter fabric as well as a preparation method and application of the nylon 66 fiber. Nylon 66A and nylon 66B melts with different relative viscosities are distributed in a parallel composite spinning mode and then extruded through a special-shaped spinneret plate, forming is conducted through a TCS one-step spinning process, and the nylon 66 fiber with micro grooves in the fiber surface and with a twisted spiral structure in the length direction is prepared. Even if warp and weft crossed meshes of the fabric are blocked by solid particles, under the action of filtering pressure, fluid can still be transferred to the lower portion from the position above the fibers (the direction of incoming flow of filtered fluid) along the micro-grooves, and it can be guaranteed that the fluid penetrates through the filter cloth to flow smoothly by stacking the micro-grooves layer by layer. The prepared composite parallel fiber has the advantages of being small in filtering resistance, high in filtering precision, long in service life and the like, can be widely applied to the field of filter fabrics, and has high application and popularization value.

The application belongs to the technical field of waste gas harmless treatment, in particular to an epoxy powder coating production waste gas harmless treatment device, which comprises a filter box, a plane filter plate is embedded in the filter box, gas collecting equipment is arranged on the top of the filter box and corresponds to the plane filter plate; a first horizontal moving seat is arranged below the plane filter plate, a strip-shaped nozzle is clamped on the first horizontal moving seat, and the top of the strip-shaped nozzle is slidably connected to the bottom of the plane filter plate; in the application, the airflow is guided from top to bottom and the U-shaped pipe is designed to turn, so that the waste gas forms a clear and coherent flow path in the filter box, the primary filtration is closely connected with the secondary water vortex filtration, the airflow dead angle is effectively eliminated, the overall filtration efficiency is improved, the gas-liquid turbulent contact is significantly strengthened by the secondary water vortex filtration mode, the fine dust can be efficiently captured, the soluble harmful components can be simultaneously removed, and thus the purification depth and emission safety are greatly improved.

The utility model discloses a cold and dry method online sampling system, and belongs to the technical field of sampling of environment-friendly flue gas emission continuous monitoring systems of coal chemical industry and thermal power plants. The cold dry method on-line sampling system comprises a heating probe rod, one end of the heating probe rod is provided with a filter, one end of the filter is provided with a sampling probe, two sides of the sampling probe are respectively provided with a compressed air control valve and a separation tank, one end of the sampling probe is communicated with a three-way joint, one side of the three-way joint is provided with a peristaltic pump, and the other side of the three-way joint is provided with a water pump. A phosphoric acid titration tank is arranged on the same side of the peristaltic pump, a heat tracing sampling pipe is arranged on one side of the three-way connector, a condenser is installed at one end of the heat tracing sampling pipe, a drying pipe is installed at one end of the condenser, a vacuum sampling pump is communicated with one end of the drying pipe, a three-way switching valve is arranged at one end of the vacuum sampling pump, and the other end of the three-way switching valve is communicated with the three-way connector. And one side of the three-way switching valve is communicated with a calibration three-way valve.

This invention relates to a device and method for detecting the cleanliness of down fabrics, belonging to the field of down quality testing technology. The cleanliness testing device includes a down washing bottle, a vibration mechanism for driving the down washing bottle in linear reciprocating motion, a water supply mechanism for providing cleaning medium to the down washing bottle, and a turbidity detection mechanism. The down washing bottle includes a bottle body structure composed of an upper bottle body and a lower bottle body, a water outlet on the lower bottle body, a screen located inside the water outlet, a gate valve assembly located outside the lower bottle body, and a limiting assembly. The water outlet is located in the direction of movement of the down washing bottle and is connected to the turbidity detection mechanism. This invention uses a vibration mechanism to oscillate the down sample. With the water outlet located in the direction of movement of the down washing bottle, the cleaning liquid is filtered through the screen by gravity-driven oscillation. The testing device maintains efficient filtration of the cleaning medium and improves detection accuracy.

A cylindrical biological deodorization filter tank is an integrated device composed of three concentric cylindrical containers and composed of a pre-washing area, a flow guide area and a biological filter tank area, the container formed by a central cylinder is the pre-washing area, the container formed by middle circular rings is the flow guide area, and the container formed by the outermost circular rings is the biological filter tank area. The pre-washing area and the flow guide area are separated by a partition plate; the diversion area and the biological filter area are separated by a diversion area side plate; a biological filter outer side partition plate is arranged on the outer side of the biological filter area; a first filler bracket and Pall ring filler are arranged in the pre-washing area, a first spraying pipe network is arranged above the pre-washing area, and a first circulating water tank is arranged at the bottom of the pre-washing area; a second filler bracket and volcanic rock combined filler are arranged in the biofilter area, a second spraying pipe network is arranged above the biofilter area, and a second circulating water tank is arranged at the bottom of the biofilter area; the second circulating pool communicates with the bottom of the diversion area; the bottoms of the first circulating pool and the second circulating pool are respectively connected with a circulating water tank through a circulating pipe network. The deodorization filter is small in occupied area, high in treatment effect and free of secondary pollution.

The invention relates to the technical field of air purification, in particular to a filter which comprises a filter element and a first supporting piece, and the filter element comprises a plurality of air inlet crests and a plurality of air outlet crests; the air inlet crests and the air outlet crests are alternately arranged in the first direction, the bending directions of the air inlet crests and the air outlet crests are opposite, and the air inlet crests are connected with the adjacent air outlet crests; the first supporting piece is arranged on the air outlet side of the filter element; the first supporting piece comprises a first supporting main body and a plurality of first comb teeth; the first supporting body is connected with the multiple air outlet crests. The first comb teeth are arranged between every two adjacent air outlet crests, one ends of the first comb teeth are connected with the first supporting body, and the other ends of the first comb teeth are connected with the inner folding faces of the air inlet crests; the first comb teeth and the filter elements are arranged at intervals in the first direction. The intervals are arranged between the filter element and the comb teeth, so that the effective filtering area of the filter element is increased, the filtering resistance is reduced, and the filtering efficiency is improved.

The utility model relates to liquid filtering and pharmaceutical equipment technical field, specifically disclose a kind of filtering device for cytarabine injection production, including horizontal cylinder, rotatably arranged with filter cartridge in the horizontal cylinder;Horizontal cylinder is provided with raw liquid inlet and filtrate outlet, the raw liquid inlet is located below filter cartridge, and the filtrate outlet is communicated with filter cartridge;Backflushing pipe is coaxially arranged in the filter cartridge, and a plurality of flushing holes are formed on the pipe wall of backflushing pipe, and one end of backflushing pipe penetrates the end of horizontal cylinder and is sealed rotary connection therewith;The structure is delayed filter membrane blockage by filter cartridge rotation centrifugal force to maintain efficient filtration, simultaneously realizes thorough, online cleaning of dead angle using rotary backflushing, and the industry problem of easy blockage, cleaning is not thorough, especially suitable for the production of cytarabine injection with extremely high aseptic requirement.

The present application belongs to the field of coating slurry preparation. The present application provides a preparation method for improving the cleanliness and coating consistency of coating slurry and a system for preparing coating slurry. The preparation method comprises the following steps: controlling the humidity of the system to be 5-30% RH and the temperature to be 20-30 DEG C; placing the initial slurry in an initial slurry tank; controlling the slurry to pass through a multi-stage micron filter after being filtered by a filtering unit from the initial slurry tank and then enter a finished slurry tank; collecting the viscosity and particle size data of the finished slurry in the finished slurry tank; if the data are unqualified, controlling the finished slurry to return to the initial slurry tank for re-drying and filtering; or if the data are qualified, controlling the finished slurry to be transferred to a storage tank. The present application cooperatively controls the humidity and filtering precision in a dehumidified environment, accurately controls the environmental humidity and filtering parameters, improves the cleanliness and production stability of the slurry, significantly reduces the energy consumption, and reduces the energy consumption by 25-35% compared with the traditional heating and dehumidification and single-stage filtering.