1711 results about "Ceramic membrane" patented technology

The invention provides an intelligent sewage treatment process optimization method and system. The method comprises the following steps: continuously collecting the flux attenuation rate, transmembrane pressure difference and pollutant spectrum data of a ceramic membrane, carrying out time sequence analysis, constructing a pollution accumulation dynamic model, and predicting a critical threshold value; when a threshold value is reached, triggering an ultrasonic cavitation device, adjusting high-frequency vibration to generate a microbubble group, stripping pollutants by utilizing shock waves, and calculating membrane flux recovery data; fusing the spectral data and the recovery data to extract an actual pollution stripping efficiency value, and comparing a theoretical value to obtain a difference proportion; if the actual value is lower than the theoretical value, the cleaning period is shortened, the fluid pressure is increased to strengthen the stripping effect, and meanwhile, dynamic model parameters are reversely corrected based on the pressure adjustment amplitude to form closed-loop regulation and control. According to the invention, intelligent prediction, self-adaptive cleaning and closed-loop optimization of ceramic membrane pollution are realized, the sewage filtering efficiency is improved, and the energy consumption and cleaning cost are reduced.

A production device for high-quality corrosion-resistant steel core aluminum stranded wire, comprising a frame stranding machine (1), an electrolyte tank 1 (2), a roller (3) and an electrolyte tank 2 (4) arranged in sequence from top to bottom. The frame stranding machine (1) is arranged vertically to strand an aluminum conductor (6) on a steel core (5). The electrolyte tank 1 (2) contains a cylindrical electrode 1 (7) and an electrolyte. The cylindrical electrode 1 (7) has openings at both ends and is placed vertically with the steel core (5) as an axis. The stranding part is located in the cylindrical electrode 1 (7). The production device for high-quality corrosion-resistant steel core aluminum stranded wire of the present invention places the frame stranding machine vertically and surrounds the stranding part with the cylindrical electrode 1, so that the distance between the steel core and the aluminum conductor and the cylindrical electrode 1 at the stranding part is roughly equal, and the steel core and the aluminum conductor at the stranding part are immersed in the electrolyte at the same depth, so that the ceramic film layer formed on the surface of the steel core and the aluminum conductor is more uniform, which can greatly improve the overall corrosion resistance of the steel core aluminum stranded wire.

The rotary cross-flow ceramic membrane filtering device comprises a shell, a main shaft unit arranged in the shell and a power unit for driving the main shaft unit to rotate, the power unit provides rotating power for the main shaft unit and drives the filtering disc to rotate, the main shaft unit is installed in the shell and executes a specific filtering task, and the shell provides necessary support and protection for the main shaft unit and the power unit and controls inflow and outflow of materials. According to the rotary cross-flow ceramic membrane filtering device provided by the invention, the ceramic membrane filtering disc is arranged, so that the filtering efficiency and the system stability are improved, the operation cost is reduced, and the rotary cross-flow ceramic membrane filtering device is suitable for being widely applied to various industrial fields needing efficient filtering solutions.

The invention provides a composite solid-state electrolyte membrane and a preparation method and application thereof, and belongs to the field of lithium battery solid-state electrolytes.The preparation method comprises the steps that solid-state electrolyte powder and carbon precursor powder are pressed into a membrane and then subjected to gradient heating calcination, and a three-dimensional framework porous ceramic membrane is obtained; uniformly mixing a lithium salt, a polymer monomer and an initiator to prepare a polymerization solution; and dropwise adding the polymerization solution onto the three-dimensional skeleton porous ceramic membrane, and carrying out thermal polymerization to obtain the composite solid electrolyte membrane. Aiming at the inorganic solid electrolyte, the composite solid electrolyte membrane with high ionic conductivity and good interfacial compatibility is obtained in a mode of in-situ construction of the composite solid electrolyte membrane, and the problems that the inorganic solid electrolyte is low in ionic conductivity, poor in interface contact and not resistant to high pressure are effectively solved.

The invention discloses an anti-fouling piezoelectric ceramic membrane which comprises a support body, a coil and a piezoelectric ceramic separation layer, the support body is made of porous ceramic with a through hole in the middle; the coil is a closed loop composed of a lead coil and a crystal oscillator; the piezoelectric separation layer is coated on the inner wall of the through hole of the support body; and the coil is arranged between the support body and the piezoelectric ceramic separation layer. When a medium containing electrolyte passes through a membrane hole, the coil generates induction direct current, the direct current is converted into positive wave pulse current through the oscillator, the wound and overlapped piezoelectric ceramic membrane separation layer is excited, ultrasonic vibration is generated, and therefore the membrane dirt blocking condition is reduced, the use efficiency of the ceramic membrane is improved, and the maintenance and use cost is reduced.

The preparation method comprises the following steps: obtaining a ZnO nano-particle seed crystal layer by a dip-coating-calcining method, and growing the ZnO nano-particle seed crystal layer on a porous ceramic membrane; inducing growth of ZnO nano-clusters on the surface of the ceramic membrane on which the ZnO nano-particles grow and in pore channels of the ceramic membrane through a hydrothermal reaction; and finally, soaking the ceramic membrane on which the ZnO nano-cluster grows in an n-octyltriethoxysilane-absolute ethyl alcohol solution, and carrying out silane chemical grafting treatment. A firm micro-nano composite multilevel structure is obtained on the surface and in pore channels of the ceramic membrane after modification through the method, meanwhile, the surface free energy of the surface and pore channels of the ceramic membrane is reduced through n-octyltriethoxysilane, the surface and the pore channels of the ceramic membrane have super-hydrophobic performance, and the preparation method is simple in preparation process, short in period and suitable for industrial production. And the universality is high.

The invention discloses an alumina-based catalytic ceramic membrane loaded with high-content ferric oxide as well as a preparation method and application of the alumina-based catalytic ceramic membrane, and belongs to the technical field of inorganic functional ceramic microfiltration membranes and preparation of the inorganic functional ceramic microfiltration membranes. The invention solves the problems that the catalytic action of the existing catalytic ceramic membrane is limited by low catalyst loading capacity, the preparation process is complicated, the cost is high and the like. When the aluminum oxide-based ceramic membrane is prepared, silicon dioxide is added to generate a liquid phase in the sintering process to promote sintering, the catalyst alpha-Fe2O3 is added into the ceramic powder before sintering, the ceramic membrane with the catalytic function is prepared in a one-step forming and co-sintering mode, the preparation process is simplified, and meanwhile the preparation cost is reduced. The content of alpha-Fe2O3 on the surface and in the ceramic membrane is increased, and Fe < 3 + > is utilized to activate crystal lattices to promote sintering. Along with the increase of the addition amount of alpha-Fe2O3, small pores are discharged in the sintering process, pore walls are shrunk, macropores are generated, the pore diameter of the ceramic membrane is gradually increased, and the permeation flux of the ceramic membrane is improved.

The invention discloses an immersed rotary ceramic membrane aeration device. The immersed rotary ceramic membrane aeration device comprises a base, a waterproof rotary motor, a rotary ceramic membrane component and a rotary joint, an internal air channel of the rotary ceramic membrane comprises an inner ring air collection cavity, a plurality of air flow channels with the same size and structure and an outer ring aeration cavity, the inner ring air collection cavity is communicated with air outlet holes corresponding to the rotary ceramic membrane where the inner ring air collection cavity is located and is communicated with the outer ring aeration cavity through the air flow channels, and different air flow channels distribute air independently. The inner ring gas collection cavity carries out secondary distribution on inlet gas, so that gas distribution is more uniform, the gas subjected to secondary distribution passes through the gas flow channels to be uniformly aerated, and meanwhile, the outer ring aeration cavity at the tail ends of the gas flow channels communicates all the gas flow channels, so that the aeration uniformity in each gas flow channel is further ensured. The whole device can be submerged in water for use, and installation, maintenance and application are all relatively flexible, simple and convenient.

The invention relates to the technical field of metal material surface treatment, in particular to an antifouling and anti-drag coating for titanium alloy pipeline binding force and a preparation method and application of the antifouling and anti-drag coating. The preparation method comprises the following steps: carrying out micro-arc oxidation treatment on a titanium alloy to form a ceramic film on the surface of the titanium alloy; the titanium alloy subjected to micro-arc oxidation treatment is subjected to a hydrothermal reaction, and a nanoscale porous thorn microstructure and hydroxyl are introduced to the surface of a ceramic membrane; coating the pre-polymerization liquid on the titanium alloy subjected to hydrothermal treatment, and performing irradiation reaction under ultraviolet light to obtain first network gel; the first network gel is soaked in a beta-sodium glycerophosphate solution, and the ion-covalent double network p (SBMA-co-AAc) / CS-beta-GP DN hydrogel is formed. The stability and durability of the coating prepared by the preparation method provided by the invention are improved, and the coating has long-term stable anti-fouling performance, is strongly combined with a titanium alloy substrate, and has excellent anti-fouling effect and anti-drag effect when being applied to the titanium alloy substrate.

The invention discloses a method for realizing pure pore size regulation and control of a silicon carbide ceramic membrane, which comprises the following steps of: a) adding silicon carbide, sodium carboxymethyl cellulose and a dispersing agent into water, and uniformly ball-milling to obtain spraying slurry; and b) spraying the spraying slurry to the surface of a silicon carbide ceramic membrane to be regulated and controlled, naturally airing, carrying out vacuum drying at 75-85 DEG C for 2-5 hours, putting into a high-temperature furnace, carrying out vacuum sintering at 800-1200 DEG C for 1-3 hours, putting into a muffle furnace, and carrying out oxidation sintering at 700-900 DEG C for 25-45 minutes. According to the method, the pore size of the silicon carbide ceramic membrane can be subjected to pure regulation and control, operation is easy, cost is low, large-scale production is easy to achieve, the influence on the thickness of an original membrane is small, the membrane layer firmness is good, the filter flux of pure water is still high, and the application value of the silicon carbide ceramic membrane in water treatment is remarkably improved.

The invention discloses a preparation method and application of a chaenomeles speciosa extract, and the preparation method comprises the following steps: S1, crushing a chaenomeles speciosa raw material, sieving, and uniformly mixing with water to obtain a first mixture; s2, adding compound lactic acid bacteria liquid into the first mixture, and performing heat-preservation fermentation to obtain a second mixture; s3, performing ultrasonic extraction on the second mixture, and then performing ceramic membrane filtration, vacuum concentration, sterilization and drying to obtain the chaenomeles speciosa extract. The extraction efficiency in the preparation process of the chaenomeles speciosa extract is remarkably improved by optimizing the technological process, the extracted chaenomeles speciosa extract shows excellent anti-oxidation, anti-aging, hypoglycemic, anti-allergic and anti-inflammatory effects, and a novel functional component source is provided for the fields of food and skin care products.

A ceramic membrane, and a process for producing a ceramic membrane. In the process for the production of a ceramic membrane the ceramic membrane is produced by additive manufacturing. The ceramic membrane comprises a membrane portion comprising pores. A nano-and / or micro-particle is formed in-situ from a nano- and / or micro-particle precursor during the additive manufacturing process and / or post-processing step. The ceramic membrane comprises the in-situ formed nano- and / or micro-particle, or residue thereof, arranged within the pores of the membrane portion. Also described is a water treatment module including the ceramic membrane.

The invention belongs to the technical field of sewage treatment and membrane separation, and provides an in-situ nondestructive membrane pollution detection system and method based on an ultrasonic transmission signal, and the system comprises an ultrasonic excitation module which is used for generating a sine wave excitation signal which penetrates through a membrane body to excite the ultrasonic transmission signal for pollution detection; the signal processing module is used for continuously collecting and preprocessing ultrasonic transmission signals of the clean membrane body and the membrane bodies with different pollution degrees, extracting ultrasonic transmission signal characteristics under different pollution degrees, and establishing a pollution thickness-signal characteristic mapping model; wherein the ultrasonic transmission signal features comprise a time-frequency domain energy gravity center feature and a frequency attenuation spectrum slope feature; and the pollution detection module is used for judging the pollution stage of the membrane body to be detected based on the pollution thickness-signal feature mapping model, and completing in-situ nondestructive membrane pollution detection. According to the technical scheme, the sludge pollution state in the ceramic membrane and flat membrane filtering process can be monitored in real time, and early warning and pollution dynamic tracking are achieved.

The invention provides a method for preparing a beta ''-aluminum oxide ceramic membrane through tape casting, and belongs to the field of conductive ceramic materials. The method comprises the following steps: carrying out first ball milling on a high-purity aluminum-containing compound, a sodium-containing compound, a stabilizer, a dispersant and a solvent to obtain first slurry; adding a binder, a plasticizer and a foam inhibitor into the first slurry to obtain second slurry; performing second ball milling on the second slurry to obtain third slurry; defoaming the third slurry to obtain fourth slurry with set viscosity; carrying out tape casting on the fourth slurry to obtain an aluminum oxide green body; and degumming, pre-sintering and sintering the aluminum oxide green body to obtain the beta ''-aluminum oxide ceramic membrane. Therefore, the beta ''-aluminum oxide ceramic membrane with controllable thickness, stable quality and low resistivity is obtained, and the application performance of the beta''-aluminum oxide ceramic membrane is improved.

The invention provides a method for calibrating a rolling friction coefficient and surface energy in a process of simulating a ceramic membrane to filter lignin by DEM-CFD, develops a semi-analytical DEM-CFD coupling interface, and on the basis, takes movement and deposition behaviors of lignin particles in a process of filtering black liquor lignin by a single ceramic membrane pore as research objects, and provides a method for calibrating the rolling friction coefficient and the surface energy in the process of simulating the ceramic membrane to filter the black liquor lignin. The capturing mechanism of lignin particles in a ceramic membrane is researched, and it is determined that key factors influencing lignin particle deposition morphology, average coordination number, coordination number distribution and lignin particle deposition structure porosity are rolling friction coefficients and surface energy among lignin particles; the rolling friction coefficient and the surface energy between the lignin particles and the ceramic membrane have little influence on the ceramic membrane; the influence of the rolling friction coefficient among lignin particles and the surface energy parameters on the deposition morphology, coordination number and porosity of the lignin particles is comprehensively considered, calibration work of the rolling friction coefficient and the surface energy parameters is completed, and a powerful tool and accurate simulation parameters are provided for subsequent research of a membrane pollution mechanism.

The embodiment of the invention provides a ceramic diaphragm automatic positioning system based on high-precision visual feedback and closed-loop control, and the system comprises a parameter reference setting module which is used for setting a theoretical reference point and a visual detection parameter; the real-time visual detection module is used for collecting an image of the to-be-stacked film and outputting an image coordinate of the mark point; the core operation module is used for converting the image coordinates of the mark points into actual coordinates based on the visual detection parameters, reading a theoretical reference point of the current to-be-stacked diaphragm and calculating a position error vector between the actual coordinates and the theoretical reference point, and the position error vector comprises a translation compensation amount and a rotation compensation amount; and the motion control and closed loop feedback module is used for receiving the position error vector and generating a control instruction to drive the workbench to move. According to the system, through parameterized reference setting, real-time visual detection, intelligent error calculation and real-time motion compensation, the technical limitation is effectively overcome, and the lamination alignment precision and efficiency are remarkably improved.

The invention discloses a polytetrafluoroethylene ceramic membrane and a preparation method and application thereof, and the preparation method comprises the following steps: (1) adding polytetrafluoroethylene and a binder into water, and carrying out first mixing to obtain polytetrafluoroethylene slurry; adding a carbon nanotube and a dispersing agent into water, and carrying out secondary mixing, so as to obtain a carbon nanotube dispersion liquid; (2) carrying out third mixing on the carbon nanotube dispersion liquid and the polytetrafluoroethylene slurry to obtain a membrane preparation liquid; and (3) coating the surface of a ceramic support with the membrane preparation liquid, drying, and carrying out microwave sintering. The PTFE / ceramic composite membrane is prepared by microwave sintering, so that the sintering time and the production period are obviously shortened, and the production efficiency and the energy utilization rate of the product are obviously improved; the prepared PTFE / ceramic composite membrane is narrow in pore diameter and uniform in pore diameter distribution, has good hydrophobicity and oil-water separation performance, can effectively intercept 30-200nm nanoparticles, and has excellent anti-pollution capacity and stable separation performance for water-in-oil emulsions with different concentrations.

The invention relates to the technical field of membrane cleaning, in particular to a ceramic membrane backwashing method, electronic equipment and a storage medium. The invention provides a backwashing method of a ceramic membrane. The backwashing method comprises the following steps: firstly, acquiring process parameters of the ceramic membrane during operation in real time; then analyzing a pollution mechanism based on the process parameters, and calculating a comprehensive pollution degree and a dominant pollution type; then, according to the comprehensive pollution degree and the dominant pollution type, a multi-stage backwashing flow state sequence is matched and generated from a predefined multi-stage flow state strategy library; and finally, aiming at each target flow state in the multi-stage backwashing flow state sequence, respectively generating a corresponding gas pulse control parameter and a corresponding water pulse control parameter, and sequentially executing the gas pulse control parameter and the water pulse control parameter. According to the present invention, the multi-stage flow state control dynamically adapting to the pollution characteristics is adopted to replace the traditional fixed flow state mode, such that the problems of insufficient pertinence and poor backwashing effect caused by the fixed flow state are solved, and the backwashing efficiency of the ceramic membrane is improved.

The invention discloses an ozone micro-nano bubble-electrochemical-ceramic membrane wastewater treatment device and method. The device comprises a reaction container, an ozone generator and a micro-nano bubble reactor, an anode, a cathode, a microporous aeration head and a catalytic ceramic membrane are arranged in the reaction container; the anode and the cathode are connected with a direct-current power supply; a water outlet pipe is connected above the catalytic ceramic membrane; the micro-nano bubble reactor comprises a gas-liquid mixed transportation pump, an inlet of the gas-liquid mixed transportation pump is respectively connected with wastewater to be treated and an ozone outlet of the ozone generator, an outlet of the gas-liquid mixed transportation pump is connected with the microporous aeration head through a gas-liquid mixed transportation pipe, and the wastewater to be treated and ozone are mixed and fed into the reaction container. The problems that an existing sewage treatment system is low in ozone utilization rate, low in removal efficiency of suspended solids, colloidal substances and refractory organics and the like are solved.

The invention discloses a siraitia grosvenorii low-temperature continuous countercurrent extraction process and a siraitia grosvenorii extract, and belongs to the technical field of siraitia grosvenorii extraction.The siraitia grosvenorii low-temperature continuous countercurrent extraction process comprises the following steps that S1, fresh siraitia grosvenorii fruits are extracted through a four-stage squeezing and continuous countercurrent extraction combined method, s2, carrying out solid-liquid separation on the first liquid phase through ceramic membrane microfiltration, and collecting a microfiltrate; and S3, carrying out post-treatment on the micro-filtrate to obtain the extract. The siraitia grosvenorii low-temperature continuous countercurrent extraction process is high in extraction efficiency and low in solvent consumption, and the prepared extract has both high sweetness and oxidation resistance.

The invention discloses a preparation method of a crocodile hydrolyzed protein zinc skin care product, and relates to the technical field of skin care. The method comprises the following steps: step a, pretreating raw materials: taking fresh crocodile meat and bones, cleaning, mechanically crushing until the particle size is less than 5mm, and adding water according to the ratio of 1: (3-5) to prepare homogenate; step b, performing three-step enzymolysis, namely performing enzymolysis by adopting alkaline protease, flavourzyme and zinc chelating enzyme in sequence; according to the constructed technology of three-step enzymolysis and three-stage membrane separation, accurate preparation of crocodile protein zinc is achieved, and the zinc chelating rate is increased to 90% or above through the gradient effect of alkaline protease, flavourzyme and zinc chelating enzyme and directional release of zinc binding sites and is remarkably higher than that of a traditional single-enzyme hydrolysis technology; meanwhile, a combined purification technology of a ceramic membrane, an ultrafiltration membrane and a nanofiltration membrane is adopted to replace chemical precipitation and organic solvent extraction, so that the completeness of active ingredients is reserved, the risk of environmental pollution is reduced, and the method conforms to the green manufacturing trend of food industry.

The invention relates to the field of ceramics, in particular to a method for depositing an ultra-pure silicon carbide film on the surface of silicon carbide ceramic, which comprises the following steps: cleaning a silicon carbide ceramic substrate with a polished single surface, and then drying to obtain a pretreated substrate; a high-purity SiC target material is installed on a magnetron sputtering target located in a vacuum bin, the pretreated substrate is placed on a rotary heating table located in the vacuum bin in the mode that the polishing face is upward, and a corresponding magnetron sputtering environment is set; performing ionization cleaning and reverse sputtering cleaning on the polished surface of the silicon carbide ceramic substrate, then performing magnetron sputtering, and depositing a SiC film on the polished surface of the cleaned substrate; therefore, the ultra-high-purity silicon carbide ceramic membrane is formed on the surface of the silicon carbide ceramic. The ultra-pure silicon carbide film obtained by the method has the technical advantages of high strength, smooth surface and the like.

The invention discloses a preparation method for simultaneously and efficiently extracting crocodile polypeptide and crocodile oil, and relates to the technical field of biological extraction, crocodile meat is used as a raw material, and heating micro-pressure treatment is sequentially performed to promote component dissolution; a multi-stage enzymolysis process is adopted, alkaline protease, neutral protease and lipase are sequentially used, and a calcium phosphate system is used for assisting filtration and a natural antioxidant is added in a gradient manner in the enzymolysis process; performing plate frame filtration and standing layering subsequently to realize crude separation of the oil peptide; finally, the crocodile polypeptide liquid is subjected to multi-stage membrane filtration and spray drying, the crocodile crude oil is subjected to ultrasonic-assisted fishy smell removal, ceramic membrane fine filtration and gradient cooling phase change refining, and after enzymolysis treatment and before filtration, a composite additive is added into enzymatic hydrolysate and stirred. No organic solvent exists in the whole process, and the product yield, purity and oxidation stability are remarkably improved.

The invention discloses a self-cleaning composite piezoelectric ceramic membrane as well as a preparation method and application thereof, and belongs to the field of composite ceramic membranes. The technical problem that an existing ceramic membrane separation technology is poor in biomembrane pollution resisting effect is solved. According to the preparation method, the barium titanate ceramic membrane is firstly prepared to serve as the base membrane, then the copper oxide one-dimensional nanostructure is loaded on the piezoelectric ceramic substrate, and the base membrane has a large membrane surface area and can be combined with more catalysts, so that more active sites are provided for catalytic reaction; according to the composite membrane, the hydrophilicity, the anti-pollution performance and the piezoelectric catalysis self-cleaning performance of the membrane are remarkably improved, and pollutants in water can be quickly and effectively separated, so that the flux and the anti-pollution performance of the membrane are improved.

The invention relates to the technical field of sewage treatment, in particular to a ceramic membrane efficient filtering method and system for sewage treatment, and the method comprises the steps of confirming a ceramic membrane filtering environment, obtaining sewage characteristics, extracting operation parameters, and executing online cleaning and collaborative filtering operation. By optimizing the online cleaning mechanism and the anti-pollution capacity of the ceramic membrane, the sewage treatment efficiency is remarkably improved. The invention further provides electronic equipment and a storage medium which are used for realizing the method. The method can call the treatment flow and parameters in the ceramic membrane operation database according to the sewage characteristics, is suitable for different sewage types, prolongs the service life of the ceramic membrane, and improves the economic benefits.

The invention relates to the technical field of nitrate production, in particular to a potassium nitrate purification device which comprises a dissolving tank, a filtering device, a crystallization kettle, a centrifugal machine and a drying machine with a steam jacket which are sequentially connected in series through pipelines. The dissolving tank first jacket is connected with a heat source through a circulating pipeline; a liquid outlet of the centrifugal machine is sequentially connected with the cyclone separator, the ceramic membrane filter, the cationic resin column, the first temporary storage tank and the heat source, and the first heat exchanger and the second heat exchanger are sequentially installed between the first temporary storage tank and a heating medium inlet of the heat source. A steam outlet pipeline of the steam jacket is connected with a heat medium inlet of the first heat exchanger, the first heat exchanger is connected with the second temporary storage tank through a pipeline, and the second temporary storage tank is connected with the heat source through a pipeline. A pipeline of the second vacuum unit is connected with a thermal medium inlet of a second heat exchanger, and the second heat exchanger is connected with a second temporary storage tank. According to the method, the potassium nitrate purification efficiency, the product purity, the resource utilization rate and the energy economy are synergistically improved.

The utility model discloses a structure of a disc-type ceramic membrane. A support body of the disc-type ceramic membrane is formed by butting inner surfaces of two support body single bodies with the same structure; an outer circle protruding ring is arranged on the outer edge of the inner surface of each supporting body single body, an inner circle hole of a concentric circle structure is formed in the center of each supporting body single body, spokes are evenly distributed between the outer circle protruding rings and the inner circle holes at intervals, connecting pieces and groove holes are evenly distributed on the outer circle protruding rings, the connecting pieces comprise protruding blocks and grooves, the protruding blocks and the grooves are correspondingly matched in shape and are alternately arranged at intervals in position, and the groove holes are communicated with the groove holes. The slotted holes are positioned in the middle between the adjacent connecting pieces; the inner surfaces of the two supporting body single bodies are in butt joint to form the supporting body, the protruding block of one single body is correspondingly embedded into the groove of the other single body, the groove holes are in butt joint with each other, and after the groove holes are in butt joint, ceramic wedges for connection are arranged in the groove holes. According to the utility model, the connecting piece and the slotted hole on the excircle convex ring are combined with the ceramic wedge, so that the connection of the two support body monomers is enhanced, the formed support body is stable in combination, the spokes support the disc-type ceramic membrane in a mirror image cross manner, the mechanical strength and the qualification rate of products are remarkably improved, and meanwhile, the production cost is reduced. The effective filtering area and the permeation flux of the disc type ceramic membrane are also effectively improved.

The invention belongs to the technical field of magnesium-zinc magnesium alloy surface treatment, and particularly relates to a method for in-situ growth of different blue ceramic film layers on the surface of a magnesium-zinc magnesium alloy. Comprising the following steps that the surface of a magnesium-zinc magnesium alloy sample is polished and cleaned, and then the surface of the sample is sequentially subjected to primary alkali washing, primary water washing, primary acid pickling, secondary water washing, secondary acid pickling, tertiary water washing and secondary alkali washing, so that the pretreated magnesium alloy is obtained; the pretreated magnesium alloy is placed in electrolyte for micro-arc oxidation treatment, and a blue ceramic film layer is generated on the surface of the magnesium alloy in situ; the electrolyte is formed by adding potassium fluotitanate and cobaltous sulfate into a silicate and phosphate composite electrolyte system; or the electrolyte is obtained by adding potassium fluotitanate into a phosphate electrolyte system. Different blue ceramic film layers are prepared, the ornamental value of the magnesium-zinc magnesium alloy component can be improved, and the visual effect is improved.

The invention relates to a preparation method of a molecular sieve type SCR (Selective Catalytic Reduction) catalytic membrane, which comprises the following steps: taking an alpha-Al2O3 ceramic membrane tube as a carrier, carrying out alkali washing and acid washing on the ceramic membrane tube, and then drying to remove impurities in the ceramic membrane tube. Meanwhile, preparing a membrane preparation solution, firstly mixing a molecular sieve with a metal compound with an SCR effect, adding deionized water to prepare a mixed solution with the catalytic metal content of 0.1-0.3 mol / L, adjusting the pH value, heating and ultrasonically carrying out an ion exchange reaction, and adding a binder to prepare the membrane preparation solution; and loading the molecular sieve catalyst to the inner side of the alpha-Al2O3 ceramic membrane tube in a dip coating manner. And drying and roasting the membrane tube, and carrying out surface hydrophobic modification on the outer side of the ceramic membrane tube to obtain the molecular sieve SCR catalytic membrane. The efficient molecular sieve SCR catalytic membrane is obtained through one-time roasting, waste gas water and dust removal and SCR catalysis can be achieved at the same time, the conversion rate of NOx in the low-temperature environment is high, and the whole process is safe and environmentally friendly.

The cheese production device comprises membrane treatment sterilization equipment, a filtering mechanism is arranged on one side of the membrane treatment sterilization equipment, the filtering mechanism comprises a filtering box, a box cover is fixedly installed at the top end of the filtering box, a liquid inlet pipe is fixedly installed on the box cover, a rotating rod is arranged on the filtering box, and a liquid outlet pipe is fixedly installed on the rotating rod. A first rotating plate is fixedly mounted on the rotating rod, a first filter cartridge is fixedly mounted on the first rotating plate, a second rotating plate is arranged at the position, below the first rotating plate, of the rotating rod, and a second filter cartridge is fixedly mounted on the second rotating plate. In the use process, milk can be filtered twice through the filter box, the first filter cartridge and the second filter cartridge before entering the membrane treatment sterilization equipment, so that residues and impurities in the milk are prevented from entering the membrane treatment sterilization equipment, being accumulated to block micropores in the surface of a ceramic membrane and affecting the sterilization working efficiency.