316 results about "Flat sheet membrane" patented technology

The invention discloses a desulfurizing tower and a desulfurizing method based on enhanced absorption of flat sheet membrane internals. The desulfurizing tower comprises a desulfurizing tower body, and a liquid distributor, the flat sheet membrane internals and fractal internals which are sequentially arranged in the desulfurizing tower body from top to bottom, according to the invention, high-concentration sulfur-containing gas is subjected to rapid pre-desulfurization at the tower bottom by utilizing the high turbulence characteristic of the fractal internals, so that the sulfide concentration can be instantly reduced, and the gas flow distribution is optimized; and the pre-desulfurized gas then enters a high-efficiency fine desulfurization area formed by the flat sheet membrane internals. According to the flat sheet membrane internal part, a plurality of vertically arranged flat sheets are utilized to form a fixed gas flowing channel, so that transverse movement of gas molecules is limited, and gas distribution is more uniform. And meanwhile, a layer of uniform and continuous absorbent liquid film is formed on the surface of the flat plate, so that the gas-liquid contact area is remarkably increased, and high efficiency and low energy consumption are achieved through full countercurrent contact and efficient gas-liquid mass transfer of gas and the absorbent liquid film under extremely low pressure drop.

The invention belongs to the technical field of gas separation membranes, and discloses a novel Cardo-based polyimide carbon molecular sieve membrane for CO2 / CH4 separation and a preparation method thereof.The carbon molecular sieve membrane is prepared in an improved carbonization mode, a synthesized carbon molecular sieve membrane precursor is a polyimide membrane with-CF3 and fluorenyl, and the carbon molecular sieve membrane precursor is a polyimide membrane with-CF3 and fluorenyl. And meanwhile, a diamine monomer with high steric hindrance is introduced for copolymerization, so that the pore distribution and gas separation performance of the carbonized carbon molecular sieve membrane are improved. The preparation method comprises the following steps: firstly, preparing a flat sheet membrane with a smooth surface from various prepared polyimides in a solvent evaporation manner, and then carbonizing a polymer membrane with high free volume and high rigidity in an improved carbonization manner, so that the polymer membrane has micropore-ultramicropore pore channel distribution and excellent gas separation performance; the method has a good industrial prospect in the field of CO2 / CH4 separation.

The invention belongs to the field of drinking water treatment, and relates to a treatment system for preparing drinking water, which comprises a water inlet device, a filter screen device and an immersed flat sheet membrane filtering device which are arranged in sequence. The immersed flat sheet membrane filtering device comprises a membrane stack, the membrane stack comprises a plurality of membrane bag units, and each membrane bag unit comprises a flat sheet membrane. The preparation raw material of the flat sheet membrane is a high polymer doped with a negatively charged microporous frame material. The preparation raw materials of the negative electricity charged microporous framework material comprise 4, 6-dicyanoresorcinol, 1, 4-butane sultone and sylvite. The negatively charged microporous frame material has a rigid microporous structure, can increase water permeation channels in a flat sheet membrane, can form a penetrating structure with membrane pores in the flat sheet membrane, effectively shortens a water transmission path, and improves membrane flux. In addition, the negatively charged microporous frame material also has negatively charged property, has repulsive action on pollutants in the water body, can prevent the pollutants from entering the aperture of the flat sheet membrane, and reduces the pollution blocking phenomenon on the flat sheet 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 relates to the field of new materials, and discloses a red mud-based ceramic flat sheet membrane and a preparation method thereof. The red mud-based ceramic flat sheet membrane comprises a substrate and a separation layer integrally attached to the surface of the substrate, the matrix is prepared from the following raw materials in parts by weight: 2000 to 4000 parts of Al2O3 powder with the average particle size of 5000nm, 200 to 350 parts of corn starch, 300 to 500 parts of red mud, 400 to 600 parts of kaolin and 2 to 8 parts of polyvinyl alcohol; the separation layer is prepared from the following raw materials in parts by weight: 4-10 parts of Al2O3 powder with the average particle size of 5000nm, 1-3 parts of a dispersing agent, 0.1-0.3 part of a defoaming agent and 1-3 parts of polyvinyl alcohol. The red-mud-based ceramic flat sheet membrane has good physical properties, the preparation method is scientific and reasonable, and the red-mud-based ceramic flat sheet membrane has the characteristics of short production period, low raw material and sintering cost and the like.

The invention discloses a flat plate membrane internal part for an absorption tower and the absorption tower. The flat plate membrane internal part comprises a plurality of vertically arranged flat plates and a supporting assembly for supporting and fixing the flat plates, a flow channel is formed between adjacent flat plates; the flat sheet membrane internal part comprises the following three structures: (I) the surface of a flat sheet is provided with continuous convex or continuous groove lines; the supporting assembly is an external frame; (2) discontinuous raised lines are arranged on the surface of the flat plate; the supporting assembly is an external frame; and (3) the supporting assembly comprises a plurality of connecting columns, and the adjacent flat plates are supported and fixed through the connecting columns arranged in a staggered mode. A fixed flowing channel in the flat sheet membrane internal part structure limits transverse movement of gas molecules, and uniform gas-liquid countercurrent contact is achieved. Meanwhile, by optimizing surface geometric lines and arrangement modes of the flat plates and the form of the supporting assembly, the gas-liquid contact area is further increased, the gas-liquid contact time is further prolonged, the gas-liquid mass transfer efficiency in the tower is improved, the pressure drop in the tower is reduced, and the energy consumption of the system is reduced.

The invention discloses a deep desulfurization device and process based on an adjustable flat sheet membrane and intelligent cooperative control, the deep desulfurization device comprises a desulfurization tower and an intelligent adjustment and control system, a variable-configuration flat sheet absorption membrane device is arranged in the desulfurization tower body, and the variable-configuration flat sheet absorption membrane device is formed by arranging a plurality of groups of hydrophilic corrosion-resistant flat sheets in parallel; a plurality of blades with adjustable angles are uniformly distributed on one side or two sides of the flat plate, and can simultaneously drive the blades to synchronously and accurately rotate under the control of a motor driven by an intelligent control driver, so that the device can actively adjust the geometrical morphology and fluid mechanics conditions of a gas channel according to real-time working conditions; meanwhile, by means of the design of an absorbent circulation loop in the tower, the flow of the absorbent entering the desulfurization tower is dynamically adjusted, and therefore rapid response to working condition fluctuation and online optimization of the desulfurization process are achieved.

The invention relates to a poly (ether) sulfuryl block copolymer integrated nanofiltration membrane and a preparation method and application thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: adding an additive with reaction active sites into a membrane casting solution, adding another substance capable of carrying out a cross-linking reaction with the additive in the membrane casting solution into a coagulating bath, and carrying out a cross-linking reaction with the additive in the membrane casting solution to obtain the poly (ether) sulfuryl block copolymer integrated nanofiltration membrane. Preparing a flat sheet membrane through a non-solvent induced phase separation technology; the compact hollow fiber nanofiltration membrane is integrally prepared on line by using a double-layer spinning nozzle through dry spraying and wet spinning by taking a membrane casting solution added with a monomer with reaction activity as an inner layer and taking a solution containing another substance capable of being subjected to cross-linking reaction with the monomer with reaction activity in the membrane casting solution as an outer layer. The method disclosed by the invention has the characteristics of simple process, simplicity and convenience in operation, short preparation period and environmental friendliness, and compared with a traditional membrane preparation process, the method is more favorable for preparing the high-flux and high-interception nanofiltration membrane.

Disclosed in the present invention are an AnDMBR dynamic membrane assembly based on electrode polarity conversion, and a control method. Specifically, in the present invention, flat-sheet membranes and conductive titanium meshes are combined and are then connected to a power source; and by means of an electrode polarity conversion method, the formation of a dynamic membrane layer is accelerated at a starting stage by using the characteristic of charges of opposite polarities attracting each other, and when the dynamic membrane layer is excessively thick, a sludge cake layer is peeled off by using the characteristic of charges of the same polarity repelling each other, so as to alleviate membrane fouling, thereby achieving effective control over membrane fouling, and ensuring the long-term and stable operation of a reactor.

The invention discloses a large-flux high-precision ceramic flat sheet membrane for removing iron and fishy smell of drinking tap water and a preparation method thereof, and belongs to the technical field of ceramic flat sheet membranes. The ceramic flat sheet membrane comprises a support body, a high-precision filter layer, an adsorption layer and a filling adsorbent. The preparation method comprises the following steps: 1) preparing a ceramic flat sheet membrane mud green body; (2) preparing a ceramic flat sheet membrane support body; 3) preparing a high-precision filter layer by a dip-coating method; (4) preparing an adsorption layer by a spraying method; and (5) filling a reinforced adsorbent and packaging an end. According to the present invention, the ultra-fine membrane material is used to produce the high separation precision, the effluent quality is ensured, the operation cost of the split type filtration is reduced, the molecular sieve adsorption membrane and the enhanced filling adsorbent are produced, and the iron ions in the urban tap water are effectively adsorbed; the vacuum dip-coating method is matched with the one-time sintering process, so that the working procedures can be saved, the yield is high, the membrane layer thickness and the membrane surface are uniform and consistent, basically no pore defect exists, and the flux and the precision stability of the ceramic flat membrane product are further stabilized.

The invention provides a ceramic flat sheet membrane end seal bonding surface roughening treatment device, and relates to the technical field of flat sheet ceramic membrane manufacturing, the ceramic flat sheet membrane end seal bonding surface roughening treatment device comprises a fixing plate, two grooves are formed in the outer wall of the fixing plate, connecting rods are slidably connected to the positions, corresponding to the grooves, of the outer wall of the fixing plate, and fixers are fixedly connected to the outer walls of the connecting rods; a pressure sensor is installed on the outer wall of the bottom end of the fixator, supporting plates are fixedly connected to the outer walls of the two sides of the fixing plate, adjusters are installed on the outer walls of the supporting plates, adjusting rods are fixedly connected to the outer walls of the adjusters, and a plurality of threaded holes are formed in the outer walls of the adjusting rods. According to the device, the groove structure of the continuous sinusoidal waveform structure similar to the gecko sole line is adopted, the binding force between the polymer and the plastic end seal can be improved to a great extent, the pressure sensor and other structures are additionally arranged, the machining state of the device can be detected in real time, and therefore the practicability of the device is higher.

The utility model relates to a ceramic flat sheet membrane end glue injection mold which comprises a base installed on a workbench, a glue injection mold box is inserted into the top of the base, a positioning column is arranged at one end of the bottom of the glue injection mold box, a handle is arranged at the other end of the bottom of the glue injection mold box, and a limiting mechanism for limiting the fixed glue injection mold box is arranged on the base. Supporting beams are correspondingly arranged at the tops of the portions, on the two sides of the base, of the workbench, a support is installed on the supporting beams, a pressing mechanism is installed on the support, the top of the glue injection mold box is provided with an opening, a circle of annular boss is arranged on the lower portion of the inner wall of the glue injection mold box, and the inner wall, located above the boss, of the glue injection mold box is sequentially provided with a first chamfering face, a vertical face and a second chamfering face from top to bottom. The bottom of the flat membrane is inserted into the glue injection mold box and is supported by a boss. According to the utility model, the problem that a sealing ring must be used when the end part of the flat sheet membrane is sealed with glue is solved, the material cost of the sealing ring and the labor cost during installation are reduced, the top of the glue injection mold box does not need to be sealed, the glue injection operation is simple and convenient, and the use is convenient.

The present disclosure provides an oil-water separation ultrafiltration membrane and its preparation method and application, which belongs to the technical field of membrane material preparation. Preparation method: according to the mass of the casting liquid of 100wt%, 10~25wt% of polyvinylidene fluoride is mixed with 5~15wt% of porogen and 1~5wt% of phytic acid, and then 0.01~20wt% of zirconium salt is added, and the casting liquid is obtained after mixing and degassing; the casting liquid is coated on a flat plate to obtain a flat membrane; the flat membrane is placed in a coagulation bath for treatment; the coagulation bath includes an organic silane with a concentration of 0~100mM / L. Also disclosed is an oil-water separation ultrafiltration membrane prepared according to the above method and its application in an oil-water separation system. The oil-water separation ultrafiltration membrane prepared by the present disclosure has good oil-water separation performance, high water permeability recovery rate, strong anti-oil pollution performance, and has the advantages of reusability and low economic cost; the preparation method disclosed in the present disclosure is simple, the conditions are mild, and the scope of use is wide.

A peritoneal dialysis (“PD”) system (10) including a PD machine (20); a patient line (50) extending from the PD machine (20); and a filter set (100) in fluid communication with the patient line (50), the filter set (100) including a filter body (110, 150, 190) housing first and second filter membranes (112a, 112b, such as a sterilizing grade or bacteria reduction filter membranes), the filter body (110, 150, 190) configured to be placed in different arrangements such that fresh PD fluid (i) flows through the first filter membrane (112a) and then through the second filter membrane (112b) or (ii) splits and flows through first and second filter membranes (112a, 112b) in parallel.

The invention discloses a wastewater treatment and recycling system which comprises a pH (potential of hydrogen) regulating tank, a silicon removal reaction tank, a first ceramic flat sheet membrane ultrafiltration tank, a fluorine removal reaction tank and a second ceramic flat sheet membrane ultrafiltration tank which are sequentially connected in series through a pipeline, and the pH regulating tank, the silicon removal reaction tank and the first ceramic flat sheet membrane ultrafiltration tank are alkaline wastewater treatment systems; the fluorine removal reaction tank and the second ceramic flat sheet membrane ultrafiltration tank are an acidic wastewater treatment system which is used for wastewater treatment, acid-alkali wastewater is subjected to quality-divided treatment and then input into the system for wastewater treatment, and alkaline wastewater is subjected to chemical silicon removal in the alkaline wastewater treatment system and then input into the acidic wastewater treatment system to be mixed with the acidic wastewater; according to the present invention, the common chemical method is adopted to remove fluorine, such that the wastewater treatment process is shortened, the ceramic flat sheet membrane ultrafiltration tank is adopted to perform filtration after the silicon removal and the fluorine removal, the flux is large, the membrane aperture is small, the water recovery amount can be improved, the extremely small reactant can be directly separated, the occupation area of the whole system is further reduced, and the process flow is simplified.

The invention discloses a hydrophobic MOF material-based mixed matrix flat sheet membrane and a preparation method and application thereof.The preparation method comprises the following steps: S1, weighing an MOF material and a cross-linking agent, adding the weighed MOF material and cross-linking agent into a solvent, and fully and uniformly mixing to obtain a solution A; s2, weighing an organic polymer, adding a solvent, and fully and uniformly mixing to obtain a solution B; s3, preparing a membrane casting solution: mixing the solution A and the solution B, fully and uniformly mixing, adding a catalyst, and uniformly mixing to obtain the membrane casting solution; and S4, mounting a flat plate support body on a pulling machine, loading the membrane casting solution on the flat plate support body by adopting a dip-coating process, and then drying to obtain the mixed matrix flat plate membrane. The dipping, extracting and film-drawing process has the advantages of wide applicability, simplicity and convenience in operation, controllable film thickness, uniformity and transparency of the film and low energy consumption, the prepared film is uniform, the area of the film is larger, and the permeability of the film can be improved while high selectivity of the mixed matrix film is ensured.

The invention discloses a method for combining a filter device by using plug-in mounting type flat sheet membrane components, and the filter device and a filter system formed by combining the plug-in mounting type flat sheet membrane components. The plug-in mounting type flat sheet membrane components comprise I-shaped plug-in mounting type flat sheet membrane components and II-shaped plug-in mounting type flat sheet membrane components; each of the I-type plug-in type flat membrane component and the II-type plug-in type flat membrane component comprises an upper connecting piece, a lower connecting piece, a groove-shaped plate and a plurality of membranes, two ends of the groove-shaped plate are detachably connected with the upper connecting piece and the lower connecting piece, so that the upper connecting piece and the lower connecting piece are relatively fixed, and the plurality of membranes are fixed between the upper connecting piece and the lower connecting piece; a water collecting box is also arranged at the upper end of the upper connecting piece of the I-shaped plug-in mounting type flat sheet membrane component, and is communicated with water outlets of the plurality of membranes; at least two of a filtering device I, a filtering device II and a filtering device III can be formed by combining the I-shaped plug-in mounting type flat sheet membrane component and the II-shaped plug-in mounting type flat sheet membrane component. The filter device and the filter system with three different structures can be combined according to different use occasions, so that the filter device and the filter system are more convenient to mount and maintain and higher in adaptability.

The utility model belongs to the technical field of sealing partition plates, and particularly relates to a sealing partition plate for a hollow fiber flat sheet membrane, the sealing partition plate comprises two mounting side plates, a flat sheet membrane assembly and an end socket assembly, the end socket assembly comprises a bottom seal and a top seal, the bottom seal is fixedly mounted at the lower end between the two mounting side plates, and the two mounting side plates are arranged in parallel; the flat sheet membrane assembly is inserted into a sealing frame formed by two mounting side plates and a bottom seal, and a top seal is detachably mounted at the upper end between the two mounting side plates. According to the utility model, the flat sheet membrane component is mounted in the sealing frame structure, the sealing frame structure is mounted in required equipment, so that the flat sheet membrane component can be applied, the top seal is mounted at the tops of the two mounting side plates through the locking bolts, so that the upper end of the flat sheet membrane component is pressed, and the front and rear sides of the flat sheet membrane component are limited by the anti-deflection stop blocks; the flat sheet membrane assembly is prevented from loosening during use, and the flat sheet membrane assembly is easy to clean or replace due to the detachable top seal.

The invention discloses a flat sheet membrane filtering device. A containing cavity is formed in a membrane shell; the membrane filtration assembly is arranged in the accommodating cavity, the membrane filtration assembly comprises a plurality of filtration elements consisting of membranes and flow guide discs, and the membranes are mounted between every two adjacent flow guide discs; the central rod penetrates through the diaphragm and the flow guide disc; the connecting assembly is arranged in the accommodating cavity and is used for connecting two adjacent membrane filtration assemblies; the quick-release end cover assemblies are arranged at the two ends of the membrane shell and are used for sealing and fastening the membrane filtration assembly; two ends of the membrane shell are respectively provided with a first water inlet and an Nth water outlet, the first water inlet is provided with a first water outlet, and the Nth water outlet is provided with an Nth water inlet; and an nth water inlet and an nth water outlet are respectively formed in two ends of each membrane filtering component in the middle section of the membrane shell. The problems that in the prior art, the structure is complex, maintenance is difficult, water flow distribution is uneven, the filtering efficiency is low, and energy consumption and operation cost are high are solved.

The invention relates to a PVDF (Polyvinylidene Fluoride) polymer lateral chromatography membrane and a preparation method thereof, and according to the method, a large-aperture PVDF membrane is prepared by blending a hydrophilic additive with high molecular weight and PVDF powder. The method comprises the following steps: mixing PVDF powder with a hydrophilic pore-foaming agent (such as PVP, PEG and the like) by adopting a solution blending method, performing non-solvent induced phase separation (NIPS) to form a membrane, immersing the membrane into a coagulating bath for a period of time, transferring the membrane into deionized water for soaking, taking out the membrane after the solvent is completely removed, and drying the membrane at normal temperature to form the membrane. And immersing the membrane in a surfactant solution for a period of time, taking out the membrane, and naturally airing the membrane so as to obtain the PVDF flat membrane which has a macroporous structure, a good pore structure, hydrophilicity and protein adsorption performance.

The invention belongs to the technical field of gas separation membranes, and discloses a novel polymer blended carbon molecular sieve membrane for butadiene / butane separation and a preparation method thereof. The polymer blended carbon molecular sieve membrane is prepared by an improved method which comprises the following steps: firstly, introducing a fluorenyl structure into polyimide to prepare high-carbon-content and high-rigidity copolyimide so as to prevent serious pore channel collapse in a carbonization process, and then blending with a polymer with good pore-forming capability according to a certain proportion. The obtained polymer is blended to prepare a flat and uniform flat sheet membrane through a solvent evaporation method, and the flat sheet membrane is carbonized through an improved pyrolysis procedure, so that the prepared carbon molecular sieve membrane has a micropore-ultramicropore structure with uniform size distribution and good mechanical properties; the catalyst shows excellent gas separation performance in butadiene / n-butane, butadiene / iso-butane and other systems, and can effectively solve the industrial problem of high energy consumption of C4 fraction separation.

The invention provides a polyether sulfone flat sheet membrane with high flux and small molecular weight interception as well as a preparation method and application thereof, and relates to the technical field of membrane materials. The preparation method of the polyethersulfone flat sheet membrane with high flux and small molecular weight interception comprises the following steps: mixing polyethersulfone, a pore-foaming agent, an additive and a good solvent to obtain a homogeneous membrane casting solution; mixing a linear hydrophilic polymer with water to obtain a high-viscosity coagulating bath; wherein the molecular weight of the linear hydrophilic polymer is more than 100kDa; coating a base material plate with the homogeneous casting membrane solution, and placing the base material plate in the high-viscosity coagulating bath to obtain a primary polyether sulfone flat sheet membrane; the primary polyether sulfone flat sheet membrane is rinsed and subjected to pore protection, and the polyether sulfone flat sheet membrane with high flux and small molecular weight interception is obtained. The high-viscosity coagulating bath is adopted, and the membrane casting liquid phase conversion time is delayed, so that a uniform and compact layer is constructed on the surface layer of the membrane casting liquid, the formation of all-medium sponge holes is promoted, and the separation precision of small-molecular-weight substances is improved.

The utility model provides a novel ultrafiltration flat sheet membrane assembly which comprises a net body assembly and a frame assembly, the net body assembly comprises a warp belt flow channel, a weft belt flow channel, a middle reinforcing core and a water flow channel; the top of the weft belt flow channel is fixedly connected to the bottom of the warp belt flow channel, one side of the middle reinforcing core is fixedly connected to one side of the warp belt flow channel, the net body assembly part is in a grid shape by adopting a three-dimensional flow channel staggered hole diameter mode, the ideal shaking effect is achieved, and the net body assembly part has the advantages of being simple in structure and convenient to use. The situation that impurities are adsorbed on the flat diaphragm to form serious filth blockage due to too small shaking is avoided, so that energy consumption is reduced, the working efficiency is improved, dense warp and weft belt runners are tightly attached to the inner surface of the flat diaphragm, water penetrating through the diaphragm flows into the frame body along the water runners, the rigidity of the flat diaphragm is improved through the arrangement of the frame body, and the service life of the flat diaphragm is prolonged. And an internal water flow channel space is reserved in the U-shaped groove, so that filtered purified water is collected.

The utility model provides biogas slurry treatment equipment for a membrane bioreactor, which relates to the technical field of membrane bioreactors and comprises a treatment tank body, a plurality of groups of flat sheet membrane mechanisms are mounted in the treatment tank body, and X-axis cleaning mechanisms are fixedly connected to the top of the treatment tank body close to the front side and the back side. Y-axis cleaning mechanisms are fixedly connected to the positions, close to the two sides, of the top of the treatment pond body, each X-axis cleaning mechanism comprises transverse guide rollers which are symmetrically arranged, transverse moving assemblies are installed at the tops of the transverse guide rollers, and first connecting blocks are fixedly connected to the tops of the transverse moving assemblies; the Y-axis cleaning mechanism comprises a Y-axis cleaning mechanism and a Y-axis cleaning mechanism, the Y-axis cleaning mechanism comprises longitudinal guide rollers which are symmetrically arranged, transverse cleaning assemblies are fixedly connected to the opposite side faces of the first connecting blocks, first power assemblies are fixedly connected to the two side faces of each transverse guide roller, and the Y-axis cleaning mechanism comprises the longitudinal guide rollers which are symmetrically arranged. Therefore, harmful substances can be conveniently collected and treated in a centralized manner.

The utility model discloses a novel flat sheet membrane pressing device which comprises a pressing table, and the top of the pressing table is fixedly connected with a supporting frame. The linear moving platform is horizontally connected to the pressing table in a sliding mode, and a linear moving assembly is installed on the pressing table; the pressing mechanism is mounted on the supporting frame; the number of the material moving mechanisms is two, and the two material moving mechanisms are symmetrically arranged on the two sides of the supporting frame; the mold comprises an upper mold plate and a lower mold plate, the PVDF film is arranged between the upper mold plate and the lower mold plate, two sets of positioning assemblies are arranged on the linear moving platform, and the positioning assemblies are in limiting fit with the lower mold plate; the curves of the longitudinal sections of the upper die plate and the lower die plate comprise a plurality of arc-shaped sections and a plurality of linear sections, and the arc-shaped sections and the linear sections alternately form a corrugated structure. The PVDF film formed by pressing is large in surface pattern size, simple and easy to generate, and low in manufacturing cost.

The invention discloses a Pt-coated ZrO2-coated SiO2 catalytic ceramic membrane with a core-shell structure as well as a preparation method and application of the Pt-coated ZrO2-coated SiO2 catalytic ceramic membrane, and belongs to the technical field of advanced oxidation and water treatment. The method comprises the following steps: preparing platinum nano sol by an ethylene glycol reduction method; the preparation method comprises the following steps: coating Pt-coated ZrO2 core-shell particles with tetragonal phase ZrO2; the preparation method comprises the following steps: preparing a porous SiO2 shell, dispersing the porous SiO2 shell in an ethanol solution, adding tetraethoxysilane (TEOS), coating the porous SiO2 shell through a Stber method by taking cetyltrimethylammonium bromide (CTAB) as a template agent and ammonia water as a catalyst, and then roasting to remove the template agent to form Pt-coated ZrO2-coated SiO2 core-shell particles; the preparation method comprises the following steps: uniformly dispersing Pt-coated ZrO2-coated SiO2 core-shell particles in absolute ethyl alcohol to obtain a suspension, dipping a commercial alpha-Al2O3 flat sheet membrane in the suspension, taking out, drying, and sintering in an air atmosphere to obtain the Pt-coated ZrO2-coated SiO2 catalytic ceramic membrane with the core-shell structure. The ceramic membrane is high in catalytic activity, good in stability and large in membrane flux. The invention is applied to advanced treatment of algae-containing water and degradation-resistant organic wastewater.

The utility model discloses a multi-piece combined flat membrane component, which belongs to the technical field of environment-friendly sewage treatment equipment and structurally comprises a water collecting cavity frame body, a water outlet hole pipe, membrane units, inter-piece pressing rings, a pressing plate frame body, a screw rod, a nut and a screw rod lantern ring, due to the fact that the supporting plate with the thickness ranging from 0.1 mm to 2 mm is used or the diaphragm unit without the supporting plate is adopted, the manufacturing cost of the multi-piece combined type flat plate membrane assembly is greatly reduced compared with that of a vertical hard plate flat plate membrane assembly. During cleaning, the nuts on the screw rods can be unscrewed, and the membrane units can be detached for cleaning, so that the membrane can be cleaned more easily compared with a multi-piece integrated soft-piece flat-plate membrane assembly.

The invention discloses an automatic vision deviation rectifying mechanism for cutting a ceramic flat sheet membrane finished product, and relates to the technical field of ceramic membrane production, the automatic vision deviation rectifying mechanism comprises a device body, an auxiliary mechanism for rectifying deviation is arranged on the device body, and the auxiliary mechanism comprises a mounting frame, an auxiliary frame and two first electric push rods; an industrial camera is arranged in a square hole of the mounting frame, an optical lens is arranged at the bottom end of the industrial camera, an L-shaped plate is fixed to the lower side of the mounting frame, and a strip-shaped illuminating lamp is mounted on the upper side of the L-shaped plate. By arranging the auxiliary mechanism, automatic visual deviation correction operation can be conducted on the ceramic flat membrane substrate in the cutting process, and therefore the situation that due to manual positioning deviation correction or mechanical baffle positioning deviation correction, the consistency of the cutting size is poor or the cutting precision is affected is avoided.

The application is a ceramic flat plate membrane and end seal integrated co-sintering forming process, comprising the following steps: S1, preparing a ceramic flat plate membrane support; S2, preparing an end seal; S3, preparing a bonding slurry; S4, combined sintering: after the bonding slurry is coated on both ends of the support mud body, drying is performed, then the end seal green body is combined, and an integrated structure is formed through one-time sintering, after sintering is completed, end seal drawing performance and end seal air tightness detection are performed; S5, preparing a flat plate membrane. After the plastic end seal is upgraded to a homogeneous ceramic end seal, the ceramic membrane product has full water quality applicability, and the risk of end seal cracking and falling off is completely solved. At the same time, in the ceramic membrane sintering process, the "integrated co-sintering forming" process is adopted, and the ceramic end seal and the ceramic membrane body are prepared synchronously. This process saves the complicated processes such as post-sintering installation, glue bonding and curing waiting required by the traditional plastic end seal, and significantly improves the product reliability and production efficiency.

The invention provides an ultrafast laser artificial blood vessel microstructure preparation method and device, and relates to the field of medical and industrial crossing. Firstly, a flat sheet membrane is flatly laid on a machining table, an ultrafast laser is used for machining the upper surface of the flat sheet membrane to form a first microstructure, and then the flat sheet membrane is curled into a tubular structure; welding the two opposite sides of the flat sheet membrane together by using the ultrafast laser again to form an artificial blood vessel, so that the inner surface of the artificial blood vessel has a first microstructure, then sleeving the artificial blood vessel on a micro-shaft, and driving the micro-shaft to drive the artificial blood vessel to rotate, and finally, processing the outer surface of the artificial blood vessel by using an ultrafast laser to form a second microstructure, and taking down the artificial blood vessel from the micro shaft after processing to obtain the artificial blood vessel of which the inner surface and the outer surface are respectively provided with the first microstructure and the second microstructure. By using the method, the microstructures can be conveniently processed on the inner and outer surfaces of the artificial blood vessel, and the processing difficulty can be reduced.