66results about How to "Improve interception ability" patented technology

The invention belongs to the field of membrane technique and discloses a method for preparing composite charged mosaic membrane via interfacial polymerization, characterized in that an ultra-filtration membrane is used as a support body; a quite thin selection layer is compounded on the support body of the ultra-filtration membrane by optimizing an interfacial polymeric monomer and by means of the interfacial polymerization; a cation exchange group and an anion exchange group are introduced to the selection layer at the same time, so that the selection layer owns structures and characteristics of the mosaic membrane; and the composite charged mosaic membrane. In comparison with other methods for preparing composite membrane, the method has the advantages that: the type, number and interfacial polymerization condition of the interfacial polymeric monomer are controlled, so an anion exchange unit is perfectly matched with a cation exchange unit in the membrane; the selectivity of membrane is good; the membrane selection layer obtained via the interfacial polymerization is thin, and the membrane flux is relatively high; in addition, the preparation technology is simple. The membrane is capable of being used for separating low molecular weight organic matters from inorganic salts, particularly separating the low molecular weight organic matters from bivalent ions, such as Mg<2+> and SO4<2->.

The invention provides a car arrester module capable of achieving modularization assembling and a matrix car arrester composed of the same. The car arrester module comprises an L-shaped body support and at least one connecting device arranged on the L-shaped body support. The support is composed of a transverse beam and a vertical beam. The connecting devices are used for splicing the car arrester module with other car arrester modules to form the matrix car arrester. Tire breaking assemblies such as bore spines and racks can be arranged on the body support and/or a connector for breaking car tires. The car arrester module has the advantages of being low in weight, small in size and convenient to carry. In addition, due to the fact that the car arrester has the modularization structure, the flexible and maneuverable arresting purpose under various road conditions and clamping setting requirements can be achieved, and the application range is wide.

The invention relates to a high-flux and high-selectivity nanofiltration membrane and a preparation method thereof. The nanofiltration membrane is a composite membrane comprising a polysulfone ultrafiltration base membrane, an ultrathin deposition layer and a polyamide layer, wherein the ultrathin deposition layer is formed by depositing an acidic amino acid-metal nano chelate on the surface of the polysulfone ultrafiltration base membrane. The preparation method comprises the steps that the acidic amino acid-metal nano chelate is prepared, the ultrathin deposition layer of the acidic amino acid-metal nano chelate is deposited on the polysulfone base membrane; the polyamide layer is formed on the ultrathin deposition layer, and post-crosslinking is carried out at the high temperature. Theprepared nanofiltration membrane has a high permeation flux, a good selectivity for monovalent and bivalent salt ions and a higher interception capacity for dye molecules, and can be applied to the fields of the dye industry in production, separation, dye wastewater treatment and the like.

The invention relates to the research field of microporous separation membrane materials, and aims at providing an unbraced high-strength polyether sulfone flat-sheet microporous membrane and a preparation method. The microporous membrane comprises an upper surface leather layer and a lower surface leather layer, wherein the upper surface leather layer and the lower surface leather layer are respectively provided with micropores, the micropores between the upper and lower surface leather layers are distributed in an hourglass-shaped asymmetric gradient sponge shape, and the middle part of themicropores are a separation layer of the membrane. The method comprises the following steps: mixing polyether sulfone, an induction pore forming agent, a hydrophilic additive and a solvent to preparea casting solution; (b) extruding and casting the casting solution from a spinneret plate onto a steel plate to obtain support, and preparing the flat-sheet crude membrane; (c) forming the membrane byvirtue of a dry-type mist spraying process; and (d) rinsing and drying. A product of the microporous separation membrane material is high in separation efficiency, high in interception capacity, andhigh in flux. The method is relatively simple and easy; the steam-liquid-induced phase inversion composite method enables the membrane production method to be high in process feasibility, and the membrane structure and performance can be better adjusted.

The invention discloses a low-NOx four-arch type W flame boiler for coupling air staging and fuel staging. A furnace chamber is divided into two parts, namely the lower furnace chamber and the upper furnace chamber, and the lower furnace chamber consists of four furnace arches, a two-stage type front and rear wall and a dry bottom hopper; a pulverized coal burner inclined outwards is arranged on the upper furnace arch, declined staging air noozles are formed in the upper part of the front and rear wall, an ultrafine powder burner inclined inwards is arranged on the lower furnace arch, protective air noozles are approximately horizontally formed in the upper part of the dry bottom hopper, and over-fire air noozles inclined downwards are formed in the lower part of the upper furnace chamber. Therefore, the condition of coupling deep air staged combustion and fuel staged combustion is constructed in the furnace, and the boiler is supplemented with prolonged flame travel caused by unique combustion design and added flame fullness degree, so that low NOx combustion and high-efficiency after-combustion for the W flame boiler are realized.

The invention relates to a sewage treatment process with a biological filter, particularly to a sewage treatment process with a biological filter filled with elastic fibers. The process comprises the following steps of: (1) packing elastic fibers in an opening biological filter with the natural extension length of the elastic fiber being 50-90% of the biological filter height; (2) compressing the elastic fibers to 50-60% of the natural extension length; closing a water outlet port of the biological filter, introducing sewage into the biological filter from a water inlet port, uniformly distributing via a top plate provided with water inlet pores, allowing water to naturally fall into the elastic fibers for percolation treatment, and closing the water inlet port; and allowing the sewage to stand inside the biological filter for 1.5-2.5 hours; (3) opening the water outlet port of the biological filter, allowing the water treated by elastic fibers to naturally flow out under the gravity action, and operating the biological filter without water for 1.5-2.5 hours; and (4) repeating the steps (2) and (3). The inventive process has the advantages of high hydraulic load and high sewage treatment efficiency; and can rapidly solve clogging problem.

The invention relates to a blockchain-technology-based ticket checking device for rail transport. The ticket checking device comprises a main body, a base, a top plate, a detecting mechanism, a tray plate, an intercepting mechanism and two slide ways. The intercepting mechanism includes a fixed plate, a bottom plate and a plurality of intercepting assemblies; and the intercepting assemblies include lifting plates and telescopic units. The detecting mechanism includes a detecting box and a conveying box; a conveying assembly is arranged in the conveying box; a camera, an inclined plate and twosupporting assemblies are arranged in the detecting box; and each of the supporting assemblies includes a supporting plate, a hinging unit, a limiting plate, and two rotating units. According to the blockchain-technology-based ticket checking device, data storage is realized by using the blockchain technology, so that the data safety is improved; with the detecting mechanism, pre detection is carried out and thus impurities are prevented from entering the main body and thus the running of the main body is protected. Besides, with the intercepting mechanism, a meshy structure is formed to prevent ride stealing by people, so that the practicability of the device is improved.

The invention discloses an anti-blocking type river treatment and sewage blocking device. The device mainly comprises two treatment boxes and two intercepting devices symmetrically arranged between the two treatment boxes; each intercepting device comprises two transmission rollers and an annular transmission network, and each intercepting device is connected with the corresponding position of theside entering water of the treatment boxes through a self-adjusting sliding rail; the upper ends of the two transmission rollers are transversely provided with a water wheel respectively, the upper ends of the two water wheels are provided with a carrier plate, and the side wall of the side entering water of the carrier plate is provided with an intercepting screen plate; and the side wall of theside entering water of each treatment box is provided with an opening, the other three side walls of each treatment box are all in a net structure, and each treatment box is connected with the innerwall of the river channel through the side wall close to one side of the river channel. According to the device, solid waste can be effectively gathered in the treatment boxes, the situation that theannular transmission net is blocked and the like is effectively prevented, and the interception efficiency of the device is kept in a high state all the time.

The invention discloses a composite nanofiltration membrane with heavy metal interception capability. The composite nanofiltration membrane is obtained by depositing amino cucurbituril intercalated graphene on a porous base membrane, wherein the base membrane is a nanofiber membrane prepared by taking graphene oxide, tyrosine, carboxymethyl hydroxypropyl guar gum and polyacrylamide as raw materials and adopting an electrostatic spinning method. The composite nanofiltration membrane has good stability and high water flux, has good interception capability on divalent/high-valent anions, heavy metal ions and anionic dyes, and is expected to be applied to treatment of heavy metal and organic dye polluted wastewater.

The invention discloses a preparation method of a flat plate microfiltration membrane for biological detection. The preparation method comprises the following steps: 1) preparing a membrane casting solution, uniformly mixing all components of the membrane casting solution for later use; 2) de-foaming: putting the membrane casting solution in step 1) into a sealed container and standing and de-foaming at 30 DEG C; 3) inducing by steam to prepare the membrane: horizontally putting a clean glass plate on a membrane scraping machine and casting the membrane casting solution to one end of the glassplate; uniformly spreading the membrane casting solution on the glass plate by utilizing a 150mu m scraping knife and remaining for 60 to 120s to enable water steam in air to be in primary contact with the membrane casting solution; exchanging with a solvent to generate tiny phase splitting; then horizontally putting the glass plate into hot steam and remaining for 30 to 80s until the surface ofthe membrane casting solution becomes white, so as to form a primary-state membrane with a round hole structure; furthermore, horizontally immersing the glass plate into a water groove containing de-ionized water with the temperature of 60 DEG C to realize complete phase splitting of the membrane casting solution, so as to form the microfiltration membrane with the thickness of 100 to 130mu m anda sponge-body-structure section.

The invention relates to the field of researching microporous separating membrane materials and aims at providing a polyether sulfone hollow fiber microporous membrane and a preparation method. The microporous membrane comprises an inner surface skin layer and an outer surface skin layer, wherein micropores are distributed on the surfaces of the inner surface skin layer and the outer surface skinlayer, and the micropores are in a sand clock type asymmetric gradient sponge body shape in the sectional direction. The method comprises the steps: mixing and dissolving polyether sulfone, an inducing pore forming agent, a hydrophilic additive and a solvent to prepare a membrane casting solution; (b) extruding the membrane casting solution and a core solution in a dry mode by a spinneret plate toprepare a hollow fiber raw membrane; (c) forming a membrane through a dry type water mist spraying technology; (d) rinsing and drying. The product can fully protect a separation layer, the separationlayer is prevented from being mechanically damaged and plugged by viruses and particulate matters, and the structure has the advantages of high separation efficiency and strong interception capacity.The method is relatively simple, easy and practical; by means of a steam and liquid conversion compound method, more technological feasibility is given to the membrane manufacturing method, and a structure and performance of the membrane can be better adjusted.

The invention relates to the field of the preparation of nonmetallic materials, and provides a preparation method of a composite coal-based adsorbing material. The invention comprises the following steps of: using low-rank coal as raw materials, crushing the low-rank coal, sieving the crushed low-rank coal, adding a silicon aluminum cross-linking agent, and uniformly mixing the sieved low-rank coal and the silicon aluminum cross-linking agent, wherein the weight proportion of the low-rank coal to the silicon aluminum cross-linking agent is 100:(1-5); feeding uniformly mixed fine materials into a muffle furnace, under the effect of nitrogen protection, warming the fine materials to 400-500 DEG C, and maintaining the temperature for 30-45 minutes; enabling steam to be continuously led into the muffle furnace, raising temperature to 700-800 DEG C, maintaining the temperature for 45-60 minutes, and then naturally cooling the fine materials to a room temperature; and baking the cooled materials so as to obtain the composite coal-based activated carbon material. The preparation method disclosed by the invention is simple and easy to operate, the cost of the raw materials is low, and the operating cost is low; the prepared composite coal-based adsorbing material is good in adsorbability, and high in combustion activity, and the coal can be effectively recycled.

The invention provides an asymmetric PES porous membrane for virus removal and a preparation method thereof, the porous membrane comprises a first porous surface, a second porous surface and a main body located between the first porous surface and the second porous surface, and the main body is internally provided with a non-directional zigzag passage; the porous membrane is a single-layer membrane; the average pore size of the PMI is 15-25 nm, the porosity is 70-85%, and the thickness is 40-150 microns; the part for intercepting the colloidal gold with the diameter of 20nm is an area which is 90-100% of the thickness of the main body from the first porous surface; the average pore size of the main body is continuously reduced in a gradient manner from a region close to one side of the first porous surface to a region close to one side of the second porous surface; the PES porous membrane is prepared only through a membrane casting solution, is integrally formed, does not need to be compounded, and is relatively simple in preparation process; meanwhile, the prepared PES filter membrane has a relatively strong interception effect on parvoviruses with the particle size of 20 nm or more, and meanwhile, a relatively high protein yield can be obtained, so that the requirements of practical application are met.

The invention belongs to sewage treatment device, in particular to waste water anaerobe treatment device with principal character of sectional water inlet operation. An anaerobic reaction chamber surrounds the main part of a reactor, the middle of the main part of the reactor is provided with a denitrification dephosphorization zone, the bottom is provided with a sludge settling zone which is externally connected with a sludge outlet pipe; the top is provided with an overflow groove which is externally connected with a water outlet pipe; the anaerobic reaction chamber is divided into a plurality of anaerobic reaction chambers by baffles, baffle plate positioned between two adjacent baffles divide each chamber into a lower water district and an upper water district, the top of the lower water district is provided with a water inlet pipe, the bottom of the upper water district is thrown in granular anaerobic sludge, the top is provided with a sewage sample port; a row of water discharging ports are arranged between the bottom of the anaerobic reaction chamber with the lowest height of the baffle and the sludge settling zone. The invention has the characteristics of very low energy consumption, high load resistance, small amount of excess sludge, good water conservancy mixing condition, easy devices, small floor area, low running cost and the like.

The invention relates to the field of filtration, adsorption and interception of heavy metal ions in a water system. A preparation method and application of grafted poly (sodium 4-styrenesulfonate) microporous filtration membrane are disclosed. Chloromethylated polysulfone, HEDA and acid-binding agent Na2CO3 are added to an ethanol, water and N, N-dimethylformamide mixed solvent for constant temperature stirring reaction, precipitation and drying to obtain a PSF-DEA modified polysulfone membrane; the PSF-DEA modified polysulfone membrane is added to the ethanol, water and N, N-dimethylformamide mixed solvent for swelling, then monomer sodium p-styrene sulfonate (SSS) and initiator ammonium persulfate (APS) are added, and a graft polymerization membrane is obtained by graft polymerization of the SSS on polysulfone surface in a redox initiator system composed of DEA/APS and constant temperature stirring reaction. The invention also relates to the application of the grafted poly (sodium 4-styrenesulfonate) microporous filtration membrane.

The invention discloses a filling material for sewage treatment and a preparation method of the filling material. The filling material is spherical and comprises a solid sphere in the centre, a sheet-like fan-shaped expansion area and a wool area on various surfaces, wherein the sheet-like fan-shaped expansion area and the wool area on various surfaces are arranged outside the solid sphere at intervals. The preparation method comprises the steps of manufacturing a spherical basal body, forming a fan-shaped surface in the expansion area, splitting and the like. By means of the unique structure and the process thereof, the filling material disclosed by the invention is good in oxygenizing efficiency and rapid to hang; the specific surface area of the filling material is high; attachment of microorganisms is promoted through the fan-shaped wool area; an aerobic state is formed in the sphere; an anoxic state is formed even in the spherical centre; a biological membrane has multiple varieties of the microorganisms, long food chain and higher processing capacity; the filling material is simple to install and convenient to operate and manage; the basal body shape of the filling material is a sphere; under the stirring of aerated bubbles, the filling material can rotate at high speed; therefore, the filling material is low in resistance and mould releasing and updating are easy; the filling material takes synthetic fibre polyurethane, which has good hydrophilia, as a substrate material.

The invention discloses a roadblock with a folding function in a parking lot. The protective device comprises a sliding rail and a protective rod, blocking mechanisms are arranged on the two sides ofthe interior of the sliding rail correspondingly. A connecting shaft is arranged on the side, away from the vertical center line of the sliding rail, of the blocking mechanism. A connecting rod is arranged on the side, close to the vertical center line of the sliding rail, of the blocking mechanism. Sliding blocks are arranged on the upper side and the lower side of the connecting rod; mounting plates are fixed to the upper side and the lower side of the sliding rail correspondingly. A fixing rod is arranged in the middle of the mounting plate, an indicating mechanism is arranged on the rightside of the sliding rail, a hydraulic cylinder is arranged on the left side of the sliding rail, connecting plates are arranged on the upper side and the lower side of the protective rod, the protective rod is located on the front face of the hydraulic cylinder, a rotating shaft is arranged in the middle of the protective rod, and a motor is arranged at the end of the rotating shaft. The roadblockwith the folding function used in the parking lot is provided with the mounting plate and the blocking mechanism, the roadblock can be conveniently disassembled and assembled on a road so as to be repeatedly used, and the roadblock can block forcibly intruding vehicles.

The invention discloses filter material finishing liquid for improving filtering precision, and a preparation method and application thereof. The filter material finishing liquid comprises the following components: 5-7% of PTFE (Polytetrafluoroethylene) emulsion, 0.5-2% of JFC penetrant, 0.5-1% of tween, 1-3% of silicone oil, 1-3% of silicone oil emulsion, and the balance of water. Application of the filter material finishing liquid for improving filtering precision in filter material production is provided. The formula and process of the filter material finishing liquid are simple, thin film is formed among fiber gaps of a filter material through finishing, the ability of the filter material to intercept dust during dedusting is improved, the resisting ability of fibers under working conditions is enhanced, and the life of needle-spun filter material is prolonged.

The invention discloses a composite nanofiltration membrane which is obtained by taking a nanofiber membrane prepared from graphene oxide, resveratrol, carboxymethyl hydroxypropyl guar gum and polyethyleneimine as raw materials by adopting an electrostatic spinning method as a base membrane and depositing cucurbituril intercalated graphene on the surface of the nanofiber membrane. According to thecucurbituril intercalated graphene, the resveratrol is used as a co-solution intercalating agent and a reducing agent, so that the distribution of cucurbituril among graphene layers is effectively improved, the interlayer distance of graphene is remarkably increased through cucurbituril intercalation, and the separation capacity of a deposited graphene membrane is effectively improved; the composite nanofiltration membrane has good stability, high organic matter rejection rate and high water flux.