41results about How to "Improve anti-pollution performance" patented technology

The application discloses an ultrafiltration membrane for sewage treatment and a preparation method thereof, and relates to the field of membrane separation technology. The method comprises the following steps: firstly, ZnO@PHEMA-Ag nanoparticles are prepared, and the nanoparticles are pretreated, modified, grafted and loaded with silver nanoclusters; then, maleic anhydride grafted PVDF and modified MXene are prepared; then, a composite casting solution is prepared, and the solution is cast into a film and then immersed into a polyvinyl alcohol coagulation bath containing dimethylformamide to form a film; finally, the finished ultrafiltration membrane is obtained through ultraviolet crosslinking post-processing. The ultrafiltration membrane has excellent anti-pollution performance through functional nanoparticles, substrate modification and process optimization.

The invention belongs to the technical field of silicon carbide flat membranes, and particularly provides a high-electronegativity silicon carbide flat membrane material and a preparation method thereof. The invention relates to a preparation method of a high-electronegativity silicon carbide flat sheet membrane material, which comprises the following steps: mixing phytic acid and an organic solvent to prepare a precursor solution, impregnating a silicon carbide flat sheet membrane substrate with the precursor solution, carrying out a reaction, and carrying out stage heat treatment. The high-electronegativity silicon carbide flat sheet membrane material prepared by the method has high electronegativity in a wide pH range, the water permeation flux is high, and after multiple humic acid pollution-cleaning cycles, the flux attenuation is less, and the anti-pollution performance is good. When silica sol is added into the precursor solution, the electronegativity of the silicon carbide flat sheet membrane material can be further improved, so that the anti-pollution performance of the high-electronegativity silicon carbide flat sheet membrane material is further improved.

The application discloses a preparation method of a high-peeling-strength inner support polyvinylidene fluoride hollow fiber membrane, and comprises the following steps: (1) mixing polyvinylidene fluoride, a hydrophilic pore-forming agent and an organic solvent to obtain a casting solution; (2) coating the casting solution on a modified support tube through a spinning nozzle, then walking vertically downward in the air, and then entering a coagulation bath to be coagulated and formed into a formed piece; and (3) soaking the formed piece obtained in the step (2) in pure water, then placing the formed piece in a mixed liquid of water and glycerol, and then drying to obtain the high-peeling-strength inner support polyvinylidene fluoride hollow fiber membrane. The anti-hook type support tube prepared by using the anti-hook technology has an increased roughness of the surface of the support tube, the casting solution and the support tube can have more contact areas, the adhesion between the membrane layer and the support tube is greatly improved, and the peeling and peeling-off of the membrane layer caused by washing during the operation of a membrane module can be effectively reduced.

The utility model discloses a water treatment system in the field of water treatment, aims at solving the technical problem of reverse osmosis membrane scale, block, system cannot stable operation. The system includes: primary pretreatment unit, primary ultrafiltration device, primary reverse osmosis device, secondary pretreatment unit, secondary ultrafiltration device, secondary reverse osmosis device and tertiary reverse osmosis device, the primary pretreatment unit water connection primary ultrafiltration device water intake, primary ultrafiltration device water access primary reverse osmosis device, primary reverse osmosis device concentrated water end connects secondary pretreatment unit, and the secondary pretreatment unit water is through secondary ultrafiltration device, and the secondary ultrafiltration water end access secondary reverse osmosis device, and its concentrated water finally enters tertiary reverse osmosis device. The utility model can combine and handle the circulating water drainage and the sewage collected in factory area, to realize water resource recovery and minimum wastewater discharge.

This invention relates to a method for preparing electronic-grade hydrofluoric acid. The invention utilizes a microchannel reactor for the fluorine oxidation reaction, significantly reducing fluorine consumption and safety hazards during production. Furthermore, the microchannel reactor enhances the gas-liquid two-phase mass transfer during the oxidation reaction, further improving impurity removal and product quality. The addition of multi-effect distillation to the distillation process not only enables secondary heat utilization but also saves on the use of high-temperature heating media at the bottom of the column, effectively reducing energy consumption. In the modified liquid, DMF serves as the solvent, cobalt nitrate provides cobalt ions, and vinylguanidine provides guanidine functional groups and amino groups. Ammonia and propanethiol are used as plasma gases to introduce amino and thiol groups onto the membrane surface. These groups help improve membrane selectivity, effectively separating metal and non-metal ions, as well as acidic impurities in the raw materials.

The application discloses a method for preparing an antibacterial nanofiltration membrane by using amikacin as a water-phase monomer, and belongs to the technical field of composite nanofiltration membrane preparation. The method uses amikacin as a water-phase monomer and adopts an interfacial polymerization method to prepare an antibacterial nanofiltration membrane (polyamide nanofiltration membrane). The method has the advantages of simple operation, mild reaction conditions and relatively low raw material cost. In addition, the prepared polyamide composite nanofiltration membrane has higher selective permeation performance and good antibacterial performance. The nanofiltration membrane flux can be as high as 20 L / (m 2 ·h·bar), and the tetracycline rejection rate can be as high as 99.3%. In addition, the application can also provide a reference for the preparation of other antibacterial interfacial polymerization separation membranes.

This invention belongs to the field of electrochemiluminescence materials technology, and discloses a gold-silver nanocluster, its preparation method, and its application in the electrochemiluminescence-electrochemical dual-mode detection of chloramphenicol. The preparation method involves adding a silver source solution to a gold source solution, then adding an alkaline thiol β-cyclodextrin solution to obtain a mixed solution. Sodium bicarbonate is added to adjust the pH to 8.2-8.4, followed by incubation to obtain a crude product of gold-silver nanoclusters. The crude product is then purified by centrifugation and dialyzed to obtain the gold-silver nanoclusters. Furthermore, this invention uses these gold-silver nanoclusters as an ECL luminescent material to construct a sensor and applies it to the quantitative detection of chloramphenicol. This sensor innovatively achieves synergistic detection of ECL and DPV dual signals, with mutually verifiable detection results, exhibiting high sensitivity, excellent selectivity, good stability, and excellent repeatability.

The application belongs to the technical field of MOF membrane and specifically relates to a Cu-BTC / cellulose composite-based MOF membrane and a preparation method thereof. After Cu-BTC / cellulose composite material is prepared by coating microcrystalline cellulose with Cu-BTC, the Cu-BTC / cellulose composite material is mixed with a membrane preparation mother liquor, a pore preparation agent and a homogeneous membrane material to form a homogeneous casting solution, and then the Cu-BTC / cellulose composite-based MOF membrane is prepared after coating, winding, solidification and drying. The Cu-BTC / cellulose composite material prepared by the application has a sub-micron rough surface and an elongated fibrous structure, and the MOF membrane prepared therefrom has more abundant pore and channel structures, which is beneficial to increasing the accessibility of active sites and greatly improving the gas permeability and gas separation performance of the membrane.

The invention discloses a low-static-consumption single-nozzle baffle type pressure servo valve which comprises a sleeve, a coil assembly, a magnet assembly, an armature assembly, a nozzle baffle stage and a slide valve stage. The baffle can be tightly attached to the oil inlet nozzle by adjusting the position of the magnetic gap screw, oil entering from the oil inlet P reaches the front end of the oil inlet nozzle through the main oil filter and is cut off by the baffle, and at the moment, when the servo valve is in a zero-position non-working state, the pilot level almost has no leakage; when a product is in a working state, the number of oil inlet nozzles is reduced by half, and the pilot-stage internal leakage rate is greatly reduced. The anti-pollution capacity of the slide valve stage is obviously improved, and the oil return pressure stability is good.

The invention relates to a functionalized polydopamine modified mixed matrix membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly immersing a mixed matrix membrane into a dopamine solution, then immersing the mixed matrix membrane into a modifier solution for improving hydrophobicity, performing ultrasonic reaction and vacuum drying during immersion, and coating the surface of the mixed matrix membrane with modified polydopamine; the modifying agent is selected from one or more of 1H, 1H, 2H, 2H-perfluorodecyl triethoxy silane, 1H, 1H, 2H, 2H-perfluorodecyl trichlorosilane and 1-dodecanethiol, and the modifying agent is selected from one or more of 1H, 1H, 2H, 2H-perfluorodecyl triethoxy silane, 1H, 1H, 2H, 2H-perfluorodecyl trichlorosilane and 1-dodecanethiol. Compared with the prior art, the selectivity and stability of the membrane are improved, and the problems of stability and treatment efficiency of the mixed matrix membrane in the separation process are effectively solved.

This invention relates to the field of wastewater treatment technology, specifically to a process and system for removing heavy metals from ink wastewater. It includes the following steps: coagulating ink wastewater with a metal composite coagulant, adsorbing and removing sludge wastewater with an ink sludge-based adsorbent, and filtering wastewater using a catechol-modified polyethersulfone membrane, followed by detection. This invention utilizes high-iron copper slag with titanium tetrachloride and acetylacetone to prepare a metal composite coagulant, transforming the copper slag into a high-value-added water treatment agent. This significantly reduces the production cost of the coagulant. Through the synergistic leaching of dilute sulfuric acid and hydrogen peroxide, the iron element in the copper slag is efficiently extracted and oxidized into Fe, which has a strong coagulation effect. 3+ The trace amounts of copper and other metal ions dissolved also provide a basis for subsequent composite reactions, thus improving the overall treatment efficiency and effluent quality of oily sludge wastewater.

The application relates to an antibacterial and antifouling reverse osmosis membrane and a preparation method thereof, and comprises the following steps: (1) uniformly dissolving a multiacyl chloride group organic compound in an organic solvent, then adding cyclodextrin, and carrying out ultrasonic treatment to obtain a cyclodextrin-organic acyl chloride inclusion compound solution; dispersing antibacterial nanoparticles in water, then adding an amino silane coupling agent, and stirring and dispersing to obtain a functionalized antibacterial nanoparticle suspension with amino groups on the surface; (2) uniformly coating the cyclodextrin-organic acyl chloride inclusion compound solution to one surface of a prefabricated reverse osmosis membrane, removing the excess solution on the surface after standing, and then coating the functionalized antibacterial nanoparticle suspension with amino groups on the surface on the surface with the cyclodextrin-organic acyl chloride inclusion compound, removing the excess solution on the surface after standing, and carrying out thermal drying to obtain the antibacterial and antifouling reverse osmosis membrane. The reverse osmosis membrane has excellent stability, small membrane sheet water flux attenuation, obviously improved antifouling capacity, and excellent antibacterial capacity.

The application discloses a gear box circulating cooling structure and cooling method for torque adjustment, relates to the field of gear box application, and comprises a base, the top of the base is provided with an input shaft, an output shaft, an intermediate shaft and a gear set, the outside of the input shaft, the output shaft and the intermediate shaft is provided with an oil injection assembly, the top of a middle cover is provided with an upper cover assembly, and the bottom of the upper cover assembly is provided with an oil sprinkling plate. The application sets two lubricating modes of lubricating oil sprinkling and lubricating oil spraying, can lubricate gears in different rotating speed stages, improves lubricating efficiency, when the gear box is cold started or driven at low speed, the oil sprinkling plate is used for oil sprinkling, when the rotating speed of the gear box increases, the centrifugal force of the oil injection assembly increases, the oil injection assembly is opened, and the lubricating oil is synchronously sprinkled and sprayed, and the sprayed lubricating oil is inclined, so that the lubricating oil can be better sprayed to the gear end face.

The invention relates to the technical field of hydraulic systems of engineering machinery, and discloses a compact load-sensitive proportional valve of an integrated hydraulic lock, which comprises an oil inlet body and a reversing body which are fixedly connected through a bolt. A main valve element is installed in the middle of the oil inlet body in a sliding mode, a pressure adjusting plug screw, a flow dividing spring, an unloading valve assembly and other components are arranged, the opening pressure can be adjusted, and overpressure unloading is achieved. A hydraulic lock assembly and a pressure compensation valve element are arranged in the reversing body and are designed in a coaxial nesting mode, and a valve element of the hydraulic lock assembly is of a double-conical-face structure. A control oil way is communicated with a main valve element displacement cavity to achieve linkage unlocking, and a load pressure feedback channel is isolated from a control channel through an independent spiral oil channel. A micro filter is arranged at an inlet of the hydraulic lock control oil duct and used for preventing pollution. The invention has the advantages of compact structure, strong anti-pollution capability and fast dynamic response, can realize the accurate matching of a pump valve system and load pressure flow, and is suitable for the control of actuating mechanisms of engineering machinery such as tractors, cranes and the like.

This invention belongs to the field of sandpaper production technology, specifically relating to a lamination and packaging system and method for dust-free ceramic dry sandpaper. The invention features a pre-assembly mechanism, a sandpaper feeding mechanism, a release liner feeding mechanism, and a lamination and packaging mechanism working collaboratively. The sandpaper and release liner feeding mechanisms respectively achieve precise, non-adhesive, and quantitative material delivery in a single layer, with precise material alignment achieved through a positioning structure. The pre-assembly mechanism utilizes vacuum adsorption and mechanical pressure to pre-assemble the double-layer sandpaper with the release liner, avoiding direct friction damage to the abrasive layers. The lamination and packaging mechanism employs a circumferential ring-shaped film formed by adhesive coating and curing. This invention effectively solves the problems of sandpaper shedding, scratches, and dust accumulation during the packaging process of high-hardness ceramic abrasive sandpaper, ensuring the performance of dust-free sandpaper, significantly reducing the cost of lamination and packaging consumables, and offering high efficiency and excellent alignment accuracy in automated assembly and lamination operations. It is suitable for the standardized mass production of high-precision dust-free ceramic dry sandpaper.

The utility model discloses a novel detachable efficient heat and mass transfer air sweeping type membrane distillation component which comprises a shell and a conveying pipeline, a membrane component is arranged on the inner side of the shell, a PTFE membrane and a silica gel gasket are arranged on the membrane component respectively, a plurality of sets of screws are arranged at one end of the membrane component, and air sweeping cavities are formed in the two sides of the top of the membrane component; according to the utility model, air sweeping type membrane distillation is adopted, so that the membrane flux and the distillation efficiency are effectively improved while the mass transfer resistance in the treatment process is reduced; in the distillation process, the hot test feed liquid does not make direct contact with the membrane, the probability and risk of membrane pollution are reduced, the anti-pollution capacity of the membrane is improved, the PTFE membrane is adopted, the product has excellent chemical stability and corrosion resistance, the anti-pollution capacity of the membrane can be effectively improved, the service life of the membrane can be effectively prolonged, and the product has high porosity and high flux and is suitable for industrial production. High-flux filtration or separation is realized, and the production efficiency is improved.

The application belongs to the field of membrane separation materials, and discloses a visible light catalytic self-cleaning oil-water separation membrane and a preparation method and application thereof, and comprises the following steps: 4-cyanopentanoic acid dithiobenzoate is used to prepare an alkyne functionalized RAFT reagent; the alkyne functionalized RAFT reagent is grafted on the polymerization chain of azidation polyether sulfone through a click chemistry reaction to obtain a RAFT reagent functionalized polyether sulfone polymer; based on the RAFT reagent functionalized polyether sulfone polymer, a PES / PES-CPPA membrane is prepared through a non-solvent induced phase separation method; a hydrophilic zwitterion PSBMA is modified on the surface of the PES / PES-CPPA membrane through a RAFT polymerization method to obtain a super-hydrophilic / underwater super-oleophobic membrane; Fe 3+ The super-hydrophilic / underwater super-oleophobic membrane is subjected to complex treatment to obtain the visible light catalytic self-cleaning oil-water separation membrane; and the application significantly improves the stability and effect of the membrane material in long-term use.

The invention relates to the technical field of charged particle beam control, and discloses an electrostatic deflector for a focused ion beam and an assembly process thereof, the electrostatic deflector comprises an electrode assembly, a mounting flange, an insulation structure and a positioning structure; an upper electrode and a lower electrode of the electrode assembly are correspondingly arranged; part of the upper electrode is embedded into the mounting flange; the insulating structure is arranged on one side, far away from the upper electrode, of the mounting flange, and part of the lower electrode is embedded into the insulating structure; the positioning structure sleeves the lower electrode; the thermal expansion coefficient of the electrode assembly is A, the thermal expansion coefficient of the insulation structure is B, and 1 < = A / B < = 1.5. The proportional relation between the thermal expansion coefficients of the electrode assembly and the insulation structure is limited, the thermal expansion coefficients of the electrode assembly and the insulation structure are matched, the deformation quantity difference of the electrode assembly and the insulation structure under the extreme working condition is reduced, thermal stress cracking is avoided, and the assembly precision and structural integrity of the electrode assembly and the insulation structure are maintained; the electric field is distributed according to design, and distortion is avoided.

The invention relates to a microbial separation device and a separation method. The microbial separation device comprises a shell and a separation cylinder arranged in the shell, a cleaning mechanism for cleaning the inner wall of the shell is arranged on the shell; the cleaning mechanism comprises an annular outer plate rotationally arranged on the shell, a plurality of connecting pins distributed in the circumferential direction are fixedly connected to the inner side of the annular outer plate, and an annular guide groove and an offset guide groove communicating with the annular guide groove are formed in the side, facing the connecting pins, of the annular inner plate; a V-shaped connecting rod is hinged to each connecting pin, a rolling wheel is rotationally connected to each V-shaped connecting rod, and the rolling wheels are contained in the annular guide grooves or the offset guide grooves and can roll in the annular guide grooves or the offset guide grooves. The independent low-speed driving mechanism is arranged, so that the scraping plate can be driven to perform continuous and circumferential scraping cleaning on the inner wall of the shell while the separation barrel performs high-speed centrifugal operation, and the mechanism ensures that splashing liquid drops are immediately scraped, guided and collected before the splashing liquid drops are not attached and dried.

The application discloses a kind of thin layer nanocomposite membranes and its preparation method and application, belong to membrane separation technical field.The method first polyamino monomer and 2,4,6-triformylphloroglucinol in organic solvent are catalyzed polymerization, and covalent organic polymer nanoparticles are prepared;Subsequently, the nanoparticles are reacted with sodium alginate to obtain hydrophilic modified nanoparticles;Finally, the modified particles are added to the aqueous phase, and the organic phase is interfacially polymerized and heat treated on the substrate to obtain a thin layer nanocomposite membrane.The application constructs a hydrophilic network and a charged nanopore, significantly improves the permeation flux of the membrane, while maintaining a high rejection rate for divalent salt, achieving the synergistic optimization of high flux and high ion selectivity, and can be applied to water treatment, desalination, magnesium-lithium separation and other fields.

The invention relates to the field of heparin lithium, in particular to a preparation process of a heparin lithium solution, and solves the problems of low product purity, easy resin pollution, low activated carbon separation efficiency and the like in the traditional process. A high-purity pretreatment solution is obtained through raw material pretreatment, impurity adsorption by composite activated carbon and magnetic separation, efficient lithium ion replacement is achieved through double modified resin, elution parameters are accurately controlled to enrich products, micromolecular impurities are removed through ultrafiltration concentration and dialysis bag desalination subsequently, and finally the sterility of the products is guaranteed through high-pressure steam sterilization. Finally obtaining a heparin lithium solution; the dual modified resin improves the lithium ion selectivity and enhances the pollution resistance; the active carbon composite modification realizes high-efficiency removal and rapid separation of impurities, and reduces the loss of heparin sodium; protein pigment impurities are removed through modification of the heparin sodium, resin adsorption loss is reduced, and finally, the quality of the heparin lithium solution product is remarkably improved, the recovery rate is greatly increased, the production efficiency is optimized, and the process stability is enhanced.

The invention discloses a preparation method of a single-component self-drying siloxane anti-icing super-hydrophobic and super-oleophobic coating, and belongs to the technical field of power transmission line functional coatings. The coating is prepared from the following raw materials in percentage by mass: 10-20% of siloxane resin, 30-40% of hydrophobic modified micro-nano powder, 45-55% of a diluent, 0.1-0.3% of a defoaming agent and 0.3-0.7% of a coupling agent. The hydrophobic modified micro-nano powder is formed by mixing aluminum oxide particles modified by perfluorodecyl trimethoxy silane and tin antimony oxide particles according to a proportion. The preparation method mainly comprises the following steps: respectively preparing two modified particles, mixing to obtain powder, mixing the powder with the resin, the diluent and the like, and grinding. Through a specific formula process, the coating has excellent super-hydrophobic and oleophobic properties, high adhesive force and strong weather resistance, solves the problems of poor mechanical durability and easy aging and shedding of the existing anti-icing coating, and is suitable for icing protection of power transmission lines in sub-cold regions such as high-speed rail power transmission networks and the like.

The application discloses a water-based polycarbonate polyol modified hydroxyl acrylic resin, which comprises a wrapping structure formed by wrapping polycarbonate polyol with water and / or hydroxyl acrylic resin, and a plurality of the wrapping structures are bonded with each other to form a three-dimensional network structure. The application also provides a preparation method of the water-based polycarbonate polyol modified hydroxyl acrylic resin and a water-based matte black two-component polyurethane coating. The water-based polycarbonate polyol modified hydroxyl acrylic resin can be used to prepare the water-based matte black two-component polyurethane coating, and the gloss of the coating can be as low as 0.8-1°, and the coating can also meet the requirements of scratch resistance and chemical resistance.

The present invention discloses an efficient immobilized propionic acid continuous fermentation system, and relates to the technical field of microbial fermentation, the system comprises: a fermentation tank main body, in which propionibacterium immobilization units containing porous ceramic carriers and chitosan alginic acid composite anchoring layers are detachably and circumferentially distributed; the material supplementing unit is connected with the tank top and comprises a raw material storage tank, a pretreatment cavity, a filter screen, a buffer cavity and a flow metering pump; the circulating pipeline is connected with two ends of the tank, is provided with a circulating pump and is internally provided with a membrane separation unit of an ultrafiltration membrane assembly; the temperature control unit consists of a jacket outside the tank and a temperature sensor inside the tank; the pH adjusting unit comprises an acid-base storage tank, a metering pump and an in-tank pH sensor; the tank is internally connected with an aeration unit of an external air source, and the bottom of the tank is provided with a blow-off unit of a blow-off pipeline with a stop valve; by constructing the propionibacterium immobilization unit combining the porous ceramic carrier and the chitosan alginic acid composite anchoring layer, the problems of low cell density and easy loss of strains in traditional propionic acid fermentation are effectively solved.

This invention belongs to the field of solenoid valve technology, specifically providing a two-position multi-way control valve. The two-position multi-way control valve includes a valve body and a valve core. The valve body includes a valve seat and a valve shell distributed along its axial direction. The valve seat includes a connecting seat, multiple connecting rings, and multiple connecting pipes with inlets and outlets. One end of the connecting seat is fixedly connected to the valve shell, and the other end is fixedly connected to a connecting ring. The multiple connecting rings and multiple connecting pipes are alternately distributed along the axial direction of the valve seat, and adjacent rings are fixedly connected. The connecting ring includes an inner convex ring located inside the connecting pipe. The valve core includes a moving iron core located within the valve shell and a valve stem located at least partially within the valve seat. The valve stem includes multiple outer convex rings, each corresponding to at least one inner convex ring. A sealing structure is provided on the outer convex rings so that during the movement of the valve core, the outer convex rings selectively seal against the corresponding inner convex ring through the sealing structure, thereby changing the communication state of the inlet and outlet.

The present application provides a process for treating waste water generated in the process of preparing epichlorohydrin by direct oxidation method, which comprises a pretreatment section, a main reaction section and a deep treatment section; the pretreatment section comprises, in sequence, an adjusting unit, a tubular microfiltration unit, a mild wet oxidation unit and a neutralization unit, the main reaction section comprises an electrodialysis unit, an anaerobic biochemical unit, a biological reinforcement unit, an ozone catalysis I unit, a concentration and salt production system and a methane storage unit; the deep treatment section comprises, in sequence, an aerobic biochemical unit, an ozone catalysis II unit and a BAF unit, and the anion exchange membrane of the electrodialysis unit is a modified anion exchange membrane. The present application solves the problem of high toxicity of chlorine-containing organic matter in waste water by coupling mild wet oxidation with electrodialysis, and realizes the separation of organic matter and salt in waste water, wherein the electrodialysis uses a modified anion exchange membrane, and the anti-pollution capacity is greatly increased. The present application realizes zero discharge of waste water, and has the advantages of low operation cost.

The invention belongs to the technical field of sewage treatment, particularly relates to an anti-pollution graphene flat sheet membrane assembly and water treatment equipment, and aims to solve the problems that a membrane assembly is easily polluted, large-particle impurities damage a membrane and a supporting mechanism and hinder sludge cleaning in the water treatment equipment, the assembly comprises a top seat, a base, a mounting frame, the membrane and a first cleaning mechanism, the device is composed of a gas injection box, a Venturi tube and the like and generates gas-liquid mixed turbulent flow to clean a diaphragm. The second cleaning mechanism comprises a cleaning ball and is driven by turbulent flow to clean; the protective grid frame body preliminarily filters large-particle impurities, the backwashing mechanism can remove impurities on the assembly, the water treatment equipment comprises the assembly and the sewage pool, the supporting mechanism in the pool facilitates placement and taking of the membrane assembly, sludge cleaning is not affected, the assembly is resistant to pollution, the membrane is protected, and the equipment is convenient to maintain.

The invention relates to the technical field of water treatment, in particular to a magnetic response coagulation-ultrafiltration coupling water treatment device and method. The device mainly comprises a coagulant adding unit, a coagulation reaction unit, an ultrafiltration unit, a sensing unit and a control unit which are sequentially communicated along the water flow direction. The coagulant adding unit is used for realizing accurate adding of a medicament, the coagulation reaction unit is a key place for regulating and controlling formation of flocs, the ultrafiltration unit is used for final solid-liquid efficient separation and actively controlling membrane pollution, and the magnetic response assembly can generate a magnetic field around a membrane assembly. The magnetic field can guide magnetic flocs in water to form a loose and high-permeability dynamic protection layer on the surface of the membrane in the filtering stage. The control unit is in signal connection with the sensing unit, and is used for dynamically adjusting the adding amount of the precise metering pump, the rotating speed combination of the stirring paddles in the gradient flocculation area, the magnetic field intensity of the magnetic response assembly and the like. The self-adaptive water treatment system is constructed by integrating intelligent feeding, gradient flocculation, magnetic response membrane separation and control.

The application provides a filtering device for water treatment, and belongs to the technical field of water treatment. The filtering device comprises a water inlet unit, an external reaction unit (5), a PVDF hollow fiber ultrafiltration membrane filtering unit (4), an ozone preparation and regulation unit, a transmembrane pressure difference detection and recording unit and a water production storage unit. The external reaction unit (5) is arranged between the water inlet unit and the PVDF hollow fiber ultrafiltration membrane filtering unit (4), and the ozone preparation and regulation unit is connected with the PVDF hollow fiber ultrafiltration membrane filtering unit (4). The filtering device of the application realizes the coupling of the membrane shell filtering unit and the in-situ ozone technology on the basis of combining the advantages of the membrane shell filtering unit and the PVDF hollow fiber ultrafiltration membrane, and effectively solves the problem of serious membrane pollution of the membrane shell filtering unit.

This invention discloses an integrated linear motion measurement system and method for discontinuous reference grating guide rails, comprising a grating guide rail with through holes, a reading body, a data processing module, and a host computer. Several grating segments are etched on the grating guide rail, and the reading body is mounted on a slider. The reading body includes 2 to 4 reading heads, which are rigidly connected. The data processing module uses an FPGA chip as the main controller to decode and process the encoded data output by the reading body, sending real-time continuous feedback signals to the CNC system and simultaneously sending position information to the host computer via a serial port. The host computer displays the data and sends commands to the data processing module via the serial port. This invention's measurement system directly etches the grating onto the guide rail, solving the technical problem of Abbe error generated when the grating ruler is installed on a machine tool. The direct integration of the reading body with the slider results in high compactness and achieves continuous signal output from the motion-measurement common base plane and the discontinuous grating.