2351 results about "Filter material" patented technology

The invention discloses a self-cleaning mechanism of a differential rotation type multi-stage air purification filter cartridge, and relates to the technical field of air purification equipment. The device comprises a purification shell, a first filter cartridge is arranged in the purification shell, the surface of the first filter cartridge is sleeved with a second filter cartridge, and the surface of the second filter cartridge is sleeved with a third filter cartridge; a driving assembly is arranged at the top of the purifying shell and comprises a driving motor arranged at the top of the purifying shell and a transmission rod installed at the output end of the driving motor. Through meshing transmission of a sun gear and a planetary gear in the driving assembly, differential rotation of the first filter cartridge and the second filter cartridge is achieved, attached particles are stripped in a layered mode through centrifugal force, the self-cleaning efficiency is remarkably improved, the differential design breaks through a static filtering mode of a traditional filter cartridge, particulate matter deposition inertia can be actively destroyed, and surface dust accumulation of a filter material is reduced; the problem of filtering efficiency attenuation caused by dust accumulation is avoided, the service life of the filter cartridge is prolonged, and the maintenance frequency is reduced.

The invention relates to the field of materials, and provides an asynchronous stretching polytetrafluoroethylene film with high aperture uniformity and a preparation method thereof. The method comprises the following steps: mixing polytetrafluoroethylene dispersion resin with mixed lubricating oil, curing, and then obtaining the polytetrafluoroethylene film through pre-pressing extrusion, multi-module longitudinal stretching and expanding and sizing, wherein the longitudinal stretching module is provided with three sections of temperature zones which are sequentially and adjacently connected, namely a core stretching deoiling zone, a high-temperature activation zone and an annealing rolling zone. Oil-containing stretching is realized by matching mixed lubricating oil with gradient temperature configuration and precise control of stretching speed in a longitudinal stretching stage, and meanwhile, controllability of pore size and high uniformity of pore size are realized by matching proper process parameters such as two-way stretching temperature, speed and multiple; the membrane can be applied to various different scenes as a filtering material.

The invention relates to a bandage, a pleated filter cartridge and dust removal equipment, and belongs to the technical field of filtering and dust removal equipment. The bandage is applied to the pleated filter cartridge and comprises a pleated structural member and a fixing structural member, the pleated structural member comprises an annular body and a plurality of tooth bodies connected to the inner side of the annular body, part of adjacent tooth bodies are arranged at intervals in the annular arrangement direction of the annular body to form receding grooves, at least one adjacent tooth body is arranged at intervals to form mounting grooves, and the fixing structural member is fixed to the annular body. The avoiding groove and the mounting groove are both used for avoiding at least one fold tooth of the filter material; the fixing structural part is arranged in the mounting groove and comprises a clamping piece part with an opening end and a connecting end and a fixing part, the clamping piece part is connected with the fixing part through the connecting end, the opening end of the clamping piece part is used for being connected with the pleat teeth of the filter material, and the fixing part is connected with the annular body. According to the bandage, the pleated filter cartridge and the dust removal equipment provided by the invention, the problems that the bandage is easy to age and deform after being used for a long time and the filtering effect of the filter cartridge is finally reduced are at least solved.

The invention relates to the technical field of high-temperature gas filtration, and particularly discloses a preparation method of a high-temperature-resistant and corrosion-resistant composite spunlace filter material. The preparation method of the filter material comprises the following steps: pretreating the PTFE short fibers, the glass fibers and the high-temperature-resistant glass fiber woven base cloth; mixing the pretreated glass fibers with PI fibers to obtain mixed fibers; the pretreated PTFE fibers and the mixed fibers are respectively subjected to carding, net forming and net laying, the pretreated PTFE fibers form a surface layer, the mixed fibers form a bottom layer, pretreated high-temperature-resistant glass fiber woven base cloth is used as middle base cloth, pre-needled reinforcement and winding are performed to obtain a pre-needled felt, and the pre-needled felt is subjected to spunlace reinforcement, drying and winding to obtain a filter material plain felt; dipping, shaping and laminating the filter material to obtain the high-temperature-resistant and corrosion-resistant composite spunlace filter material. According to the method, a high-temperature-resistant system for increasing the temperature-resistant threshold value layer by layer is formed, the corrosion resistance is enhanced, and synergistic improvement of high temperature resistance and strong corrosion resistance is achieved.

The invention discloses a device and method for preparing biochar from corncobs, and belongs to the technical field of biochar preparation, the device comprises a machine base, a frame is fixed outside the machine base, an outer cylinder is horizontally fixed on one side of the machine base, and the outer cylinder is fixedly connected with the frame; the crushing seat is arranged above the outer cylinder; the combustion system is arranged on one side of the outer barrel, and the combustion system is externally connected with a hot gas booster fan; the sealing end cover is fixed in the outer cylinder body; the carbonization cylinder is rotationally mounted on the machine base, and one end of the carbonization cylinder is coaxially and rotationally connected with the sealing end cover; the heat control unit is arranged in the annular cavity of the carbonization cylinder; the material guide channel is arranged on the sealing end cover; the filter material unit is fixed in the carbonization cylinder; according to the device, a scrap mixture can be graded according to the particle size, primary carbonization of the scrap mixture is achieved, then the scrap mixture is remixed and then subjected to high-temperature pyrolysis carbonization, and the purity and quality of biochar preparation are improved.

The embodiment of the utility model provides a filter plate of a plate-and-frame filter press and the plate-and-frame filter press, and relates to the technical field of filter presses. The filter plate of the plate-and-frame filter press comprises a filter plate main body, a plate frame body and a filter disc plate, and connecting grooves are formed in the front side and the rear side of the tops of the two sides of the filter plate main body. A pressing plate is pressed to drive a pull rod to move downwards, a second clamping plate is driven to move when the pull rod moves, the second clamping plate extrudes and retracts a spring set, at the moment, the second clamping plate is separated from the surface of a first clamping plate, and then a plate frame body and a filter disc plate can be detached for maintenance or replacement; meanwhile, when filtering work is completed and a hydraulic cylinder drives a movable end to be separated from a filter plate main body, a second spring is reset to drive a sliding ring to move on the surface of a positioning rod, so that a supporting plate drives a propping plate to move, and the propping plate drives a guide wheel and the spaced filter plate main body to assist in bouncing off, so that filtered materials are conveniently discharged, the pressure of a shifting device is reduced, and the filtering efficiency is improved. And the discharging efficiency is improved.

The invention relates to the technical field of sewage treatment, and discloses a novel sulfur autotrophic denitrification filter material and a preparation method and application thereof.The particle size of the filter material is 3.0-4.0 mm, and the filter material is prepared from 40%-45% of a composite sulfur source, 70 + / -2% of sulfur and 30 + / -2% of sodium thiosulfate, 30%-35% of modified ceramsite, 50-100 [mu] m / 200-300 [mu] m of bimodal pore size and 8%-10% of a conducting medium. The ratio of graphene to biochar is 3: 1), a buffer medium (5%-7%, Fe2O3 (52% + / -2%), CaCO3 (31% + / -2%) and MgO (17% + / -2%), a binder and an inert filler. The preparation method comprises the steps of raw material pretreatment, mixing granulation, stepped calcination, gradient impregnation, buffer medium directional loading, post-treatment and the like. The filter material solves the problems of by-product accumulation, insufficient microbial adhesion, large pH fluctuation and blockage of a traditional filter material through gradient sulfur release, a three-dimensional electron transfer network, a multistage pore anti-blockage design and a composite pH buffer system, is suitable for sewage denitrification treatment, and is high in denitrification efficiency and good in stability.

The invention discloses a cyclone separation and moving particle bed coupled pulverized coal pyrolysis oil gas high-temperature dust removal system, and belongs to the technical field of coal clean utilization. The system comprises a cyclone separator, a fine filtration unit, a filter material cyclic regeneration unit and an intelligent control unit, the fine filtration unit comprises a particle bed, a particle bin is arranged at the top end of the particle bed, and a composite filter material layer is arranged on the particle bed; a dust-containing high-temperature oil gas pipeline and a pretreatment high-temperature oil gas pipeline are arranged at the top end of the cyclone separator, dust-containing high-temperature oil gas is introduced into the cyclone separator through the dust-containing high-temperature oil gas pipeline to be pretreated, and the pretreated dust-containing high-temperature oil gas is introduced into the particle bed through the pretreatment high-temperature oil gas pipeline to be finely filtered; and a coke breeze discharge pipe is arranged at the bottom of the cyclone separator. The invention is used for solving the technical problem of low gas-solid separation efficiency at high temperature caused by the adoption of a single filter material in the existing pulverized coal dust removal system.

The present invention provides a class of ultra-high molecular weight polyethylene microparticles having a small particle size and a low bulk density. Specifically, the present invention provides microparticles having the following characteristics: (a) a viscosity-average molecular weight in the range of 1 million to 5 million; (b) at least 90% by weight passing through a 100-mesh sieve; a particle median diameter (d50) of 40 μm < d50 < 80 μm; and (c) a powder bulk density of 0.25 to 0.33 g / cm 3 The ultra-high molecular weight polyethylene particles provided by the present invention are suitable for producing microporous filter materials.

The invention discloses a CO detection device for a monorail crane diesel engine, and relates to the technical field of gas detection equipment, the CO detection device comprises a mounting box, a detection assembly is arranged on one side in the mounting box, the detection assembly comprises a detection box, a gas chamber is arranged in the detection box, a laser detector is arranged in the gas chamber, and the laser detector is arranged in the detection box. One end of the air chamber is fixedly connected with an air inlet filtering assembly, and one side of the detection assembly is provided with a back-flushing cleaning assembly used for cleaning the air inlet filtering assembly; one end of the mounting box is rotationally connected with a butt joint used for being in butt joint with an exhaust pipe of the diesel engine. Sampled flue gas is filtered through the gas inlet filtering assembly, high-pressure flue gas is stored through the high-pressure gas storage cavity, the high-pressure flue gas is discharged to the gas inlet filtering assembly when needed through control of the backflushing electromagnetic valve, filter material carbon deposition is removed through gas reverse impact force, and the trouble of frequent manual replacement and maintenance is avoided.

The invention belongs to the technical field of intelligent control, and particularly relates to an air purification system based on intelligent perception and a self-adaptive regulation and control method thereof. Comprising a multi-dimensional environment perception unit, an environment data fusion and modeling unit, a self-adaptive regulation and optimization decision unit, a modular air purification execution unit and a man-machine interaction and user preference setting unit. According to the method, multi-element parameters are collected, fusion modeling is carried out, a pollution source is identified and predicted, a multi-target optimization algorithm is applied to generate an optimal purification strategy, and then a purification execution unit is controlled. The indoor air quality can be finely and dynamically managed, the purification efficiency is remarkably improved, energy consumption, operation noise and the service life of a filter material are intelligently balanced, and a personalized healthy breathing environment is provided.

The present invention relates to the technical field of air purification, and particularly provides a nanofiber composite air purification filter material and a preparation method therefor. The nanofiber composite air purification filter material comprises a composite structure consisting of four layers arranged from top to bottom, which are respectively a non-woven fabric, a nanofiber membrane layer, a modified melt-blown non-woven fabric and a spunbond non-woven fabric; the non-woven fabric is PET needle-punched non-woven fabric; in parts by weight, the raw materials for preparing the nanofiber membrane layer comprise: 10-20 parts of polylactic acid, 3-5 parts of a reinforcing agent, 2-4 parts of modified nanoparticles and 100-150 parts of a solvent; and the spunbond non-woven fabric is made of PET or PP. The nanofiber composite air purification filter material provided by the present invention has air-permeability, radiation resistance, and antibacterial properties, can be widely applied in the field of air purification filter materials, and has considerable commercial application value.

This application relates to the technical field of pipelines and discloses a water filtration pipeline, comprising a pipeline body, the pipeline body including a water delivery unit and a filter unit, the filter unit being connected and communicating between the two water delivery units; the filter unit including two main pipes and two branch pipes, the two main pipes being connected to the two water delivery units, the two branch pipes being located between the two main pipes, and the two ends of each branch pipe being connected to the two main pipes, the connection point between the branch pipes and the main pipes being a communication port; each main pipe has a movable blocking seat, and the filter unit has an adjustment device for driving the blocking seat to move; the branch pipes are used to place filter material, and each branch pipe has a material exchange port connected to the branch pipe for replacing the filter material. The branch pipes are detachably mounted with an opening and closing seat at the material exchange port for opening and closing the opening. This application can reduce the impact of replacing filter material on production efficiency.

The invention belongs to the technical field of sewage treatment, and particularly relates to an intelligent response filter material, a preparation method thereof and a denitrification deep-bed filter tank. The intelligent response filter material is of a three-layer composite structure and sequentially comprises a carbon source inner core, a transition layer and a wrapping layer from the inner layer to the outer layer; the carbon source core comprises aquatic plant powder, aggregate and reinforced fibers, the transition layer adopts a hydrophilic modified porous carrier, and the wrapping layer adopts a pH responsive polymer. According to the invention, the intelligent response type filter material prepared from aquatic plant straws is adopted, and the pH response type envelope can automatically adjust the release rate of a carbon source according to the pH change caused by the denitrification process, so that intelligent on-demand supply of the carbon source is realized, and the denitrification efficiency and the utilization rate of the carbon source are greatly improved.

The invention relates to the technical field of water treatment, in particular to a prawn fry raw water biological filter treatment device. According to the technical scheme, the device comprises a pretreatment box, a disinfection box, an adjusting plate, a fine treatment box, a motor and a purification box, a screw is arranged at the output end of the motor, a nut in threaded installation with the screw is arranged at the upper end of the adjusting plate, the outer wall of the adjusting plate is sleeved with an air bag, an air pump is arranged at the upper end of the adjusting plate, and the air pump and the air bag are communicated and provided with an air supply pipe; a pressure relief valve is arranged in the air supply pipe, a disinfection box is arranged on one side of the lower portion of the fine treatment box, sealing gaskets are arranged on the inner wall of the fine treatment box and the outer wall of the purification box, overflow holes are formed in the side wall of the lower end of the purification box, and a filter material layer is arranged in the purification box. Through modular design, the efficiency and economical efficiency of prawn fry raw water treatment are remarkably improved, and the problems that a large-area biological filter cannot flexibly adjust the treatment capacity and is difficult to adapt to different scale requirements are solved.

The invention discloses a preparation method for forming a hierarchical pore filter material through secondary coating. In order to solve the problems that an existing filtering material is single in pore diameter, and filtering efficiency and pressure drop are difficult to consider at the same time, the hierarchical pore filtering material is formed through the following steps that 1, first-time coating is conducted, specifically, a NaCl template agent and a PTFE solution are mixed according to the ratio of 7: 3, 7%-16% of a solvent is added, a NaCl-coated PTFE foaming solution is prepared, a polyphenylene sulfide needled felt is coated with the NaCl-coated PTFE foaming solution, pre-drying is conducted, and then washing is conducted to form a macroporous structure; 2, secondary coating: coating the macroporous layer with a PTFE foaming liquid containing an AC foaming agent, and carrying out stepped sintering to form micropores, so that efficient interception of particles of 0.5-2.5 microns is realized, and the pressure drop is reduced to 116-251Pa. The multi-stage hole filtering material is suitable for high-temperature flue gas treatment such as waste incineration, has high filtering performance and low running resistance, and has remarkable environmental protection and economic value.

The invention discloses a preparation method and application of a PTFE composite filter material with a denitration function, and belongs to the technical field of filter materials. A high-temperature-resistant PTFE polymer needled filter material is used as a base material, and polydopamine and MXene are adopted to carry out functional modification on the fiber surface of the filter material, so that the dispersion degree and the synergistic effect of a catalyst on the fiber surface are improved; the preparation method comprises the following steps: uniformly loading a manganese-cerium denitration catalyst precursor on the surface of a filter material fiber by virtue of an equivalent-volume impregnation method, then calcining to obtain an active component of the denitration catalyst, and finally impregnating in hydrogen peroxide to further activate the composite filter material, so that the low-temperature denitration activity of the composite filter material is improved. The PTFE composite filter material prepared by the invention has good denitration capability at low temperature, retains the original dust filtering effect in the preparation process, can meet the requirement of low-temperature denitration and dust removal integration in industrial tail gas, and effectively overcomes the defects of complexity, high treatment cost and the like of a tail flue gas purification system in the prior art.

The invention relates to the technical field of dust prevention and ventilation, and particularly discloses a dust-proof ventilation structure for a clean room, the dust-proof ventilation structure comprises a supporting platform, a filtering structure, an air outlet pipeline, a cutoff structure and a cleaning device, the supporting platform can support the whole device to operate stably; the filtering structure is arranged at the rear end of the top surface of the supporting platform close to the center; the air outlet pipeline is arranged at an air outlet in the bottom of the right end of the filtering structure. The bottom of the filtering structure is fixedly connected with the supporting platform. The cutoff structure is arranged at the front end, close to the center, of the top surface of the supporting platform, the top of the cutoff structure extends into the center of the top of the separated air outlet pipeline, and the cutoff structure can cut off the air outlet pipeline; the cleaning device is arranged at one corner of the left end of the top face of the supporting platform. According to the device, pollution source input is blocked through mechanical cutoff and impurity collection of the cutoff structure, and internal dust sources generated by filter material dust accumulation are reduced through active dust removal of the cleaning device.

The invention relates to the technical field of dust removers, and discloses a bag-type dust remover for sintering waste gas treatment and a fracturing propping agent ceramsite sand preparation technology.The bag-type dust remover for sintering waste gas treatment comprises a dust filtering chamber, a dust collecting chamber is arranged below the dust filtering chamber, and the bag-type dust remover further comprises a dust filtering unit; the first supporting plate and the second supporting plate are vertically arranged in parallel, a transverse plate is arranged below the first supporting plate, a plurality of dust filtering assemblies are horizontally arrayed on the first supporting plate and the second supporting plate, each dust filtering assembly comprises a polygon prism-shaped filter cylinder, a cylinder support is arranged in each filter cylinder, and each cylinder support comprises a plurality of parallel supporting ribs; and during dust filtration, the filter cartridge and the cartridge support are in a twisting state. According to the device, by increasing the surface area and the wrinkle density of a filter material, the smoke dust collecting capacity per unit volume is remarkably improved, and the filtering efficiency is improved compared with that of a traditional cylindrical filter cartridge; the pulse airflow excites the reciprocating torsional vibration of the filter cartridge, and the energy storage effect of the inertia disc and the conical spring is combined, so that the smoke dust falling rate is increased.

The utility model discloses a turbine grinding device. The turbine grinding device comprises a grinding barrel, a rotating shaft, a turbine grinding disc and a turbine filtering disc. A grinding cavity is formed in the grinding barrel, the grinding barrel is provided with a first end and a second end which are opposite, the first end is provided with a feeding port, and the second end is provided with a discharging port; the rotating shaft is rotationally connected to the second end and extends into the grinding cavity, the turbine grinding disc and the turbine filtering disc are both installed on the rotating shaft, and the turbine filtering disc is located on the side, close to the second end, of the turbine grinding disc; a hollow cavity is formed in the position, corresponding to the turbine filtering disc, in the rotating shaft and communicates with the discharging port, and the turbine filtering disc is used for filtering materials in the grinding cavity and discharging the materials into the hollow cavity. And furthermore, the turbine filtering disc is used for filtering and discharging the materials with the particle sizes reaching the standard, and the materials with the particle sizes not reaching the standard continue to return to the grinding cavity to be ground again until the materials reach the standard are filtered and discharged. Therefore, not only can the particle size uniformity of the ground material be ensured, but also continuous grinding operation can be realized, and the grinding quality and the grinding efficiency can be improved.

Aspects of the present disclosure are directed to apparatuses and related method involving filters and filtering. As may be implemented in accordance with one or more embodiments, a filter material is configured to filter particulates from air passing through the filter material, and includes an adjustable component to provide two or more sizing configurations of the filter material. Coupling material is configured and arranged to couple a surface of the filter material to an air passage opening of a ventilator apparatus, while facilitating air flow through the filter material and with the air passage opening. The coupling material and filter material are configured for subsequent concurrent removal from the ventilator apparatus.

The utility model relates to the technical field of filters, and discloses a buckle type bag filter which comprises a fixed seat and a plurality of filter bags mounted on the fixed seat, a plurality of mounting ports matched with the upper parts of the filter bags are formed in the fixed seat, a plurality of rotating frames are rotationally connected to the upper surface of the fixed seat, and the rotating frames are arranged on the fixed seat. Mounting openings are formed in the fixed seat, U-shaped feeding openings matched with the mounting openings are formed in the rotating frames, two rotating frames are arranged on the two sides of each mounting opening, clamping units are arranged between the ends of the two symmetrical rotating frames and the upper surface of the fixed seat, the side face of the upper portion of the filter bag is located between the rotating frames and the fixed seat, and the clamping units are used for fixing and extruding the two rotating frames. According to the utility model, the upper part of the filter bag is tightly pressed on the upper surface of the fixed seat by rotating the two rotating frames, and the two rotating frames are extruded and fixed through the clamping units, so that the upper part of the filter bag is uniformly stressed, the damage of the filter bag caused by more filtered matters in the filter bag is prevented, the filter bag is convenient to replace, and the stability of the filter bag after installation is improved.

A medical device delivery arrangement that includes a medical device, a delivery system, and a filter arrangement. The delivery system includes a catheter and a guide shaft that are configured to move independently from one another. The filter arrangement is configured to move between a constrained-collapsed position and a deployed position. The filter arrangement includes a filter frame and a filter material. The guide shaft is moveable relative to the filter arrangement between a constraining and non-constraining position. The filter arrangement is positioned in the constrained-collapsed position when the guide shaft is in the constraining position due to the guide shaft being positioned partially or fully over the filter arrangement. The filter arrangement is in the deployed position when the guide shaft is in the non-constraining position due the guide shaft being positioned distal to the filter arrangement.

The invention belongs to the technical field of oral liquid preparation, and particularly relates to suction filtration equipment for oral liquid preparation, the suction filtration equipment comprises a suction filtration cylinder, a middle communication channel, a filter cylinder, an anti-accumulation type liquid filtering mechanism and an acceleration type pressure flow mechanism, the middle communication channel is communicated with the upper wall of the suction filtration cylinder, the filter cylinder is communicated with the upper wall of the suction filtration cylinder, and the anti-accumulation type liquid filtering mechanism is communicated with the middle communication channel. The anti-accumulation type liquid filtering mechanism is arranged in the suction filtration cylinder, the middle communication channel and the filter cylinder, the speed increasing type pressure flow mechanism is arranged on the anti-accumulation type liquid filtering mechanism, and the anti-accumulation type liquid filtering mechanism comprises an outer filtering assembly, an inner filtering assembly and a pressure reducing assembly. According to the suction filtration equipment for oral liquid preparation, traditional Chinese medicinal materials in liquid medicine can be prevented from being subjected to suction filtration to form cake layers, the probability that a filter screen is blocked is reduced, it can be guaranteed that small-particle medicinal materials cannot be sucked into a filter material, and the passing ability of the filter material is guaranteed.

The utility model discloses a filter tank for blast furnace slag treatment, which relates to the technical field of blast furnace ironmaking filter residue treatment equipment, and comprises a filter tank structural body, a filter tank body and a filter tank body, the supporting piece divides the containing space into a filtering layer with a filtering material and a water storage layer located below the filtering layer, and the supporting piece supports the filtering material and enables the filtering layer to be communicated with the water storage layer; the upper side of the filter layer is used for piling slag, and the water storage layer is used for storing at least part of filtered water; the back flushing unit is arranged in the water storage layer, and the back flushing unit is used for filling back flushing water into the water storage layer. The filter tank for blast furnace slag treatment provided by the utility model can accurately detect the water level of filtered water, and the local part of the filter material is not easy to harden.

The application discloses a kind of nanocellulose modified acrylic water-based emulsion and its preparation method and application, it is related to the technical field of polymer composite.A kind of modified acrylic water-based emulsion includes 180-220 parts of acrylate monomer, 45-60 parts of functional monomer, 3-5 parts of nanocellulose liquid, 4-6 parts of emulsifier, 1.5-2 parts of initiator, 2-3 parts of sodium bicarbonate and 275-300 parts of deionized water, wherein functional monomer includes hydroxy acrylate, acrylonitrile and fluorine-containing acrylate.By using fluorine-containing acrylate with nanocellulose to modify acrylic emulsion, water-based emulsion with good film-forming performance can be prepared, and the formed coating has good adhesion, stain resistance, heat oil resistance and mechanical strength, if the water-based emulsion is applied to the surface modification of filter material, not only can improve the hand feeling of filter material, but also can improve the stain resistance and service life of filter material surface.

A coffee making system includes a multi-use filter body. The filter body includes a base, a top portion, and a sidewall connecting the base and the top portion, the sidewall at least partially including filter material. The filter material is adapted to allow the passage of liquid and prevent the passage of coffee grounds. The filter body is selectively useable in an inverted position as a filter in a press coffee making mode of operation and selectively useable in an upright position in a pour-over coffee making mode of operation. In another version, the filter body and a transverse filter body combine to form a dual filter arrangement that can be used in a press coffee maker and / or to make an infused beverage.

The invention relates to a composite metasilicic acid mineralized filter element profile as well as a preparation method and application thereof, and relates to the technical field of water purifiers, the composite metasilicic acid mineralized filter element profile is prepared from the following raw materials in parts by weight: 60 to 80 parts of metasilicic acid mineralized carbon material and 20 to 40 parts of bonding material; the metasilicic acid mineralized carbon material is prepared from the following raw materials in parts by weight: 30-60 parts of metasilicic acid mineralized powder, 30-60 parts of activated carbon powder, 0.3-2 parts of an antibacterial agent, 0.2-1 part of a pore forming agent and 0.5-5 parts of a stabilizer. According to the composite metasilicic acid mineralization filter element profile provided by the invention, the formula of the filter material is designed, so that the composite metasilicic acid mineralization filter element profile has a good specific surface area, the contact area between active ingredients such as mineralization materials and water is ensured, the composite metasilicic acid mineralization filter element profile not only has the adsorption, harm removal and impurity removal functions of activated carbon, but also can separate out mineral substances, and is beneficial to realizing stable release of metasilicic acid.

The utility model discloses a surface fibrillated aramid fiber non-woven fabric treatment system, which is based on a composite process of chemical acid treatment splitting and mechanical spunlace splitting, can effectively improve the fibrillation degree and the filtering efficiency of a needled aramid fiber non-woven filter material, and simultaneously reduces the loss of treated fibers and the influence on the physical properties of the filter material. The treatment process is simple, and the treatment liquid can be recycled for multiple times. The treatment system comprises a needling device, a pretreatment pool, a first spraying device, an acid treatment pool, a second spraying device, a spunlace device and a drying device which are sequentially arranged in the direction of an assembly line. The needling device is used for preparing aramid fibers fed into the needling device into aramid non-woven fabric; pretreatment liquid is contained in the pretreatment pool and is used for cleaning the aramid fiber non-woven fabric; a chemical splitting reagent is contained in the acid treatment tank and is used for dipping the aramid fiber non-woven fabric; the spunlace device is used for performing spunlace processing on the aramid fiber non-woven fabric.

The invention discloses modified bamboo charcoal powder, a modified bamboo charcoal powder / polyacrylonitrile composite film and a preparation method thereof, and relates to the technical field of polymer composite films. The preparation method comprises the following steps: firstly, carrying out ball milling treatment on bamboo charcoal fibers to prepare superfine bamboo charcoal powder with nanoscale particle size, cleaning, oxidizing and modifying the superfine bamboo charcoal powder to obtain modified bamboo charcoal powder, and then jointly dispersing the modified bamboo charcoal powder and PAN in a DMF (Dimethyl Formamide) solvent, stirring and dissolving to prepare a uniform membrane casting solution. A wet film is formed on a glass substrate in a film coating mode, and the superfine modified bamboo charcoal powder / PAN composite film is finally obtained through the steps of solidification, cleaning and drying. The film has the good film-forming property of PAN and the excellent adsorption property of bamboo charcoal, and shows good mechanical strength and high thermal stability and adsorption efficiency. The method is simple in process and wide in material source, has a good industrialization prospect, and is suitable for the fields of environment-friendly filtering materials, energy storage and high-temperature-resistant materials and the like.