36results about How to "The process is simple and reliable" patented technology

The invention relates to multi-element rare earth silicate / silica carbon nano composite ceramic and a preparation method thereof. The composition general formula of the nano composite ceramic is (YbaHobErcLudTmeGdfTbgYhLaiScj) 2SixO2x + 3 / SiOC, a + b + c + d + e + f + g + h + i + j = 1, at least two of a, b, c, d, e, f, g, h, i and j are not 0 at the same time, and x = 1 or 2. The preparation method comprises the following steps: reacting a rare earth metal element complex with a silicon-based polymer to obtain a single-source precursor; the single-source precursor is obtained through cross-linking and high-temperature heat treatment, or the single-source precursor is subjected to cross-linking and pyrolysis to obtain ceramic powder, and the ceramic powder is further sintered at high temperature to obtain a ceramic block. The preparation method is simple, reliable, short in period and low in cost, and the water and oxygen corrosion resistance of the material can be effectively improved.

The invention discloses a method for preparing a high-nickel positive electrode material through ultralow-temperature composite coating, the high-nickel positive electrode material and a lithium ion battery. An uncoated high-nickel positive electrode material is obtained through one-time sintering, PVDF / H3BO3 is adopted as a cosolvent, a metal oxide, phosphate and the like are adopted as coating materials, and high-compactness uniform coating of the positive electrode material in an ultralow-temperature environment is achieved. When a traditional high-temperature technology is adopted for coating, due to the fact that materials such as metal oxide and phosphate are inactive, a large number of inactive cations are easily embedded into crystal lattices of the materials due to the high sintering temperature. On one hand, the capacity of the positive electrode material is reduced, and on the other hand, the isolation effect of the coating layer on electrolyte becomes poor due to the reduction of the density of the coating layer. The coating layer prepared by the method is good in uniformity and high in compactness, the discharge capacity, the cycle life, the rate capability and the safety performance of the positive electrode material can be effectively improved, the technological process is simple, the production cost is low, and the method is suitable for industrial production of products.

The invention is suitable for the field of oil and gas exploitation, and discloses a same-well multi-layer oil extraction and gas injection tubular column mechanism and an oil extraction and gas injection method.The method comprises the steps that after a packing unit is lowered in a sleeve of an oil well to a designated position for setting and fixing, an oil extraction unit is lowered, the oil extraction unit penetrates through the packing unit, and a packing space is formed in the packing unit; the packing space penetrates through the casing pipe to be communicated with a stratum, carbon dioxide associated with oilfield development can be captured, separated and pressurized to be in a gas-liquid mixed supercritical state through the injection pipe, and the carbon dioxide is reinjected to a seabed salt water layer to be safely sealed and stored without being leaked into other spaces of the casing pipe. Petroleum liquid below can enter the platform through the punching pipe. The technology is simple and reliable, oil extraction and gas injection are mutually independent and do not influence each other, the problems that offshore oilfield well slot resources are precious and the cost is high due to the fact that one well is used for sealing carbon dioxide independently can be solved, and the purposes that an oilfield is green, low in carbon and normal in production can be achieved.

The invention relates to a high-efficiency enrichment and recovery process for indium in an indium-containing acid solution, which comprises the following steps of: feeding an indium-tin-containing raw material into a top-blown furnace for smelting, and volatilizing most indium and entering a dust collection system along with smoke dust to obtain indium-containing top-blown furnace smoke dust; carrying out centralized treatment on the indium-containing top-blown furnace smoke dust in an electric furnace to obtain high-indium electric furnace smoke dust; then the high-indium electric furnace smoke dust is subjected to wet treatment, washing is conducted firstly, then sulfuric acid is used for leaching, an acid solution rich in indium, zinc, cadmium and a small amount of tin elements is obtained, and tin is enriched and recycled in the form of acid leaching residues and returned for tin smelting; neutralizing and precipitating the indium-containing acid solution with ammonia water to obtain indium precipitation slag and indium precipitation liquid; washing the indium precipitation residues with water to obtain washed indium residues and washing liquid, and drying the washed indium residues to obtain indium-rich residues. According to the method, indium, tin and other high-value metals can be efficiently separated from the zinc-cadmium slag with low consumption, efficient enrichment and recovery of indium and tin are achieved, zinc and cadmium are recovered in the form of zinc-cadmium slag, and comprehensive recovery and utilization of various valuable metals are achieved.

This invention provides the application of a mixture of methylstyrene with high para-isomer content in the preparation of polystyrene substitute copolymers, belonging to the field of polymer material synthesis technology. This invention is the first to directly utilize a low-cost mixture of methylstyrene isomers to replace high-purity styrene. Through a "boiling-condensation" cycle in the fluidized bed polymerization process, efficient and constant-temperature heat dissipation is achieved, effectively overcoming the heat transfer difficulties and temperature runaway risks of traditional bulk polymerization. This facilitates control of the polymerization mechanism and yields random copolymers with a narrow molecular weight distribution and mechanical properties comparable to general-purpose polystyrene. This method is simple and controllable, significantly reduces raw material costs, and combines economic benefits with environmental value. The resulting copolymers can be used in general plastics, packaging materials, and other fields.

The utility model discloses a combined type steel hub capable of easily guaranteeing high machining precision, which comprises an axle hub, a rim coaxially arranged on the outer side of the axle hub and a spoke connected between the axle hub and the rim, and the outer side surface of a spoke connecting disc is attached to the inner side surface of an axle hub connecting disc and is locked through a plurality of rivets distributed in the circumferential direction; the circumferential outer wall of the connecting steel ring is attached to the circumferential inner wall face of the spoke and fixedly connected with the circumferential inner wall face of the spoke through a welding technology. According to the combined type steel hub capable of easily guaranteeing the high machining precision, the axle hub, the rim and the spoke are machined into a whole and are totally completed through one-time welding and multi-point riveting, so that the difficulty of a paint baking process is greatly reduced, and the problem that a traditional disc brake disc is too thin is solved; and meanwhile, the problem of machining deformation easily caused by repeated welding of the traditional combined steel hub is thoroughly solved, and the machining precision and the yield are greatly improved.

An air heat exchanger and its manufacturing method are disclosed. The air heat exchanger includes a honeycomb panel and heat exchange tubes. The honeycomb panel includes a plurality of pores extending along a first direction. The heat exchange tubes include an inlet pipe, an outlet pipe, and heat exchange tubes connected in series or parallel between the inlet pipe and the outlet pipe. The heat exchange tubes are disposed within the honeycomb panel and extend along a second direction perpendicular to the first direction. The air heat exchanger of this invention comprises a honeycomb panel and heat exchange tubes, with some heat exchange tubes disposed within the honeycomb panel and in close contact with it. The honeycomb panel provides a large heat exchange area per unit volume. Combined with the vertical through-hole design of the heat exchange tubes, an extremely short heat conduction path is created, enabling the heat exchanger to reduce its volume by more than 30% compared to traditional finned tube heat exchangers for the same heat exchange capacity, achieving true high efficiency and compactness.

The air filter air inlet pipe comprises a blow molding pipe, a corrugated pipe, a sealing ring, a support and a sealing rib strip, the corrugated pipe is connected with the blow molding pipe, the sealing ring is installed on a connector at the end, away from the corrugated pipe, of the blow molding pipe, the support is installed on the side, close to the sealing ring, of the blow molding pipe, and the sealing rib strip is installed on the support. The sealing rib is installed in a connector at the end, away from the blow molding pipe, of the corrugated pipe, a connector at one end of the air filter air inlet pipe is connected with the wading throat through the sealing ring, and a connector at the other end of the air filter air inlet pipe is connected with an air filter air inlet through the sealing rib. According to the air filter air inlet pipe, the application scene, the sealing reliability, the assembly requirement and the comprehensive manufacturing cost of the cross-country wading vehicle type are fully considered, the air filter air inlet pipe which is high in integration degree, high in connection and sealing reliability and good in assembly performance is designed, practicability is good, and the high technical competitiveness is achieved.

The invention discloses a preparation process of rosin modified acrylic acid solid resin. The preparation process comprises the following steps: esterifying refined rosin and an acrylic acid functional monomer in the presence of a catalyst and a polymerization inhibitor by using a solid-phase synthesis method to obtain a polymerizable rosin functional monomer; then adopting a semi-continuous solution polymerization method to obtain an acrylic resin solution with the solid content of 30-60%; then carrying out vacuum distillation to obtain an acrylic resin concentrated solution with the solid content exceeding 60%; and continuously extruding the acrylic resin concentrated solution to discharge solids, granulating to obtain low-VOC rosin modified acrylic resin particles, and separating the solvent in the concentrated solution from the unreacted residual polymerizable rosin functional monomer. The process flow is simple, safe and reliable, the production efficiency is high, the product manufacturing cost is low, VOC is low, and the rosin modified acrylic acid solid resin which has good adhesive force to PE and PP and good wetting dispersity to organic pigments can be obtained, and the acid value, the Tg value, the molecular weight and the molecular weight distribution can be adjusted and controlled.

The invention discloses a simplification implementation method of a TYPE-C14 PIN fast-charging female head conforming to an association specification, and the method comprises the steps: 1, enabling an A1 contact part, an A4 contact part, an A9 contact part, an A12 contact part, a B1 contact part, a B4 contact part, a B6 contact part, a B7 contact part, a B9 contact part and a B12 contact part to be disposed on an integrated terminal material strip, and obtaining a 12PIN terminal group; the B6 contact part and the B7 contact part form short circuit; the A6 contact part and the A7 contact part are integrally arranged on a metal middle spacer, and the metal middle spacer comprises a left side partition plate part and a right side partition plate part, so that a metal middle spacer with a 2PIN terminal is obtained; the A6 contact part and the A7 contact part form short circuit; step 2, assembling and positioning the metal middle spacer with the 2PIN terminal on the 12PIN terminal group on the integrated terminal material strip so as to form a terminal spacer assembly body; step 3, injection molding; step 4, separating the material belt; and step 5, mounting a shell. Therefore, the method accords with the latest version standard of the USB association about TYPE-C, is compatible with a fast charging protocol, and realizes fast charging with low cost.

The present invention provides a weakly conductive amino acid molecular imprinting polymer film electrochemical sensor and a preparation method thereof, and a ketamine detection method, belonging to the technical field of drug detection. The present invention uses amino acids as functional monomers and ketamine (KT) as template molecules to synthesize weakly conductive amino acids @KT-MIPs by electropolymerization. Due to the rich active sites and good electrochemical activity of amino acids, the polyamino acid film polymerized on the electrode surface exhibits excellent catalytic activity and biocompatibility. The polyamino acid film not only combines ketamine as a template molecule, but also improves the electrocatalytic performance of the ketamine detection electrode, and has specific recognition of ketamine, which can improve the accuracy of the detection results.

The present invention discloses a Janus affinity-repellent composite membrane and a preparation method and application thereof. The Janus affinity-repellent composite membrane is a double-layer structure membrane prepared in one step by airflow-assisted jet electrostatic spinning technology. The bottom layer is a porous membrane formed by uniformly compounding the thermal conductivity factor collected by a pin-plate-shaped receiving device and hydrophobic thermal conductive micro-nano fibers, and the top layer is a porous membrane composed of mid-infrared emitting hydrophilic micro-nano fibers. The Janus affinity-repellent composite membrane is applied to the field of high-humidity cooling textiles to achieve heat management of people or objects. Due to the hydrophobicity, hydrophilicity, thermal conductivity, mid-infrared emissivity of the material itself, the directional water transport channel formed by the pore-pore gradient and the micro-nano size structure of the fibers in the top layer membrane, the Janus affinity-repellent composite membrane can integrate high thermal conductivity, daytime radiation cooling and evaporative cooling, thereby significantly improving the cooling performance of the material. The preparation process is simple, the industrial feasibility is large, and a new approach is provided for the development of cooling textiles.

The invention discloses a TYPE-C 14-PIN quick-charging female head conforming to the association specification and an electronic product. The TYPE-C 14-PIN quick-charging female head comprises a 12-PIN terminal set, a metal middle spacer with 2-PIN terminals, an insulating body and a shell. Wherein the A1 contact part, the A4 contact part, the A9 contact part, the A12 contact part, the B1 contact part, the B4 contact part, the B6 contact part, the B7 contact part, the B9 contact part and the B12 contact part are arranged on the integrated terminal material belt, the A6 contact part and the A7 contact part are integrally arranged on the metal middle spacer to obtain the metal middle spacer with the 2PIN terminal, and the insulation body is fixed to the 12PIN terminal set and the metal middle spacer with the 2PIN terminal in an injection molding mode. The 14-PIN terminal only needs 6 welding pins, the size of the terminal can be designed to be larger, the larger current transmission requirement is met, and the welding process is easy, so that the quick charging requirement of the latest version standard of the USB association about TYPE-C is met with a simpler and more reliable structure and process and lower cost.

The invention discloses a flexible GaAs photovoltaic device with a bidirectional light trapping structure and a preparation method, and belongs to the technical field of solar cells. The device comprises an anti-reflection functional layer, a top electrode, a photovoltaic epitaxial layer, a back electrode and a flexible substrate from top to bottom. The anti-reflection functional layer is a columnar array formed by photoresist doped with high-refractive-index nanoparticles, and is used for broadband and wide-angle anti-reflection; and the back electrode is a metal layer covering the patterned insulating pyramid array to form a diffuse reflection back mirror. The micro-nano structures on the front and back surfaces achieve a synergistic effect, bidirectional light trapping is achieved, and the light trapping capability is greatly improved. According to the preparation method, low-temperature patterning processes such as 3D direct writing, nanoimprint, ink-jet printing and the like are adopted in the whole process, the flexible substrate is perfectly compatible, and the problems of damage and high cost caused by a traditional high-temperature etching process are solved; and meanwhile, high efficiency, high flexibility and low cost are realized, and the method is particularly suitable for the high-end flexible electronic fields of wearable equipment, aerospace and the like.

The application discloses a wall-mounted air communication equipment damping device. The device comprises a support, guide nails, guide sleeves and metal rubber column vibration isolators, wherein two fixed legs are installed on one side of the air communication equipment body, two guide sleeves are installed on the other side of the air communication equipment body, two guide nails are installed on the support corresponding to the two guide sleeves, and two fixed legs are installed corresponding to the body; during installation, first, the fixed legs on one side of the air communication equipment body are installed on the body through the metal rubber column vibration isolators, then the guide nails on the support are aligned with the guide sleeves of the air communication equipment body and are pushed into complete cooperation, and finally, the fixed legs of the support are installed on the body through the metal rubber column vibration isolators. The application has the advantages of small volume, simple and reliable process, convenient installation and maintenance, improved anti-vibration performance and reliability of the air communication equipment, and meets the application requirements of the wall-mounted installation of a new generation of aircraft platform equipment or limited space resources.

The invention relates to the technical field of wastewater treatment, and particularly discloses a method for removing COD (Chemical Oxygen Demand) and ammonia nitrogen in ammonium rhenate production wastewater in a short process, which comprises the following steps: pumping pretreated wastewater into an advanced oxidation reaction tank, turning on a circulating pump, pumping the wastewater into an ultra-fine bubble generator from the advanced oxidation reaction tank to form ultra-fine bubbles, and then removing ammonia nitrogen in the ultra-fine bubbles; hydroxyl radicals are generated in the waste liquid, the hydroxyl radicals perform chain scission on organic macromolecular pollutants in the waste liquid to form small-molecular organic matters, part of the small-molecular organic matters continue to react with the hydroxyl radicals and are decomposed and mineralized into carbon dioxide and water, and meanwhile, the hydroxyl radicals can perform deep oxidation on ammonia water or ammonium ions; the method comprises the following steps: dissolving ammonium rhenate into ultra-fine bubbles, converting the ultra-fine bubbles into nitrogen and water, directly overflowing the nitrogen from the solution, reacting for 18-36 hours at the temperature of 25-45 DEG C, determining whether to discharge the wastewater according to a monitoring result, and completely degrading COD and ammonia nitrogen in the ammonium rhenate production wastewater in one step by using the ultra-fine bubbles, thereby shortening the process flow and saving the production cost.

The invention discloses a manufacturing process of a hexagonal runner pipe fitting, which comprises the following process steps of: A1, manufacturing two symmetrical semicircular solid pieces, and closing the two solid pieces to form a circular piece; a2, grooves are formed in the opposite faces of the two solid parts, the grooves penetrate through the solid parts in the length direction of the solid parts, and a hexagonal flow channel is formed in the middle after the two solid parts are folded; a3, the opposite faces of the two solid pieces are made into inclined faces, the inclined faces are located on the two sides of the groove, and after the two solid pieces are folded, a welding seam area is formed between the two vertically-opposite inclined faces; a4, two solid pieces are welded and fixed in the welding seam area, and a hexagonal runner pipe fitting is obtained; and A5, a flange is welded to the end of the hexagonal flow channel pipe fitting. According to the method, the hexagonal runner with the accurate size can be manufactured in the pipe fitting, the process is simple and reliable, and the quality of the manufactured pipe fitting meets the requirement.

The present invention provides a method for eliminating microcracks inside electron beam welds of cobalt-based high-temperature alloys. The method provided by the present invention comprises the following steps: a) hot isostatic pressing the welded part; wherein the welded part is a GH5188 alloy welded part; the conditions of the hot isostatic pressing treatment are: temperature 1150-1180°C, pressure 150-180MPa, and heat preservation and pressure holding time 2-5h; b) solution treatment of the welded part obtained in step a). The method provided by the present invention can effectively eliminate microcrack defects inside electron beam welds of cobalt-based high-temperature alloys, and at the same time can improve the mechanical properties of the welded joint without deteriorating the mechanical properties of the matrix.

The present invention relates to a light-emitting diode device structure with a sidewall field plate and a preparation method thereof. The sidewall field plate structure is composed of an insulating layer and an anode electrode covered on the insulating layer; the insulating layer covers the current expansion layer, the hole transport layer, the electron blocking layer and the side wall of the active region and the upper surface of the electron transport layer in the light-emitting diode mesa; the width of the insulating layer from the electron blocking layer to the side wall of the current expansion layer in the light-emitting diode mesa is 0.001 to 1 μm, and the width of the insulating layer on the upper surface of the electron transport layer is greater than the width of the insulating layer from the electron blocking layer to the side wall of the current expansion layer; the sidewall field plate structure is used to deplete the edge carriers of the light-emitting diode device and reduce the carrier concentration at the edge of the device, so that the non-radiative recombination at the edge of the device can be weakened, so that the carriers of the entire device can be effectively utilized, and finally the light power of the light-emitting diode device, especially the small-sized light-emitting diode device, can be improved.

The invention discloses a steel slag crushing, magnetic separation and recycling system which comprises a plant, a bridge crane, a slag braising pit, a pit cover and an exhaust chimney, a bridge crane is arranged in the plant, and a hot-stewed slag pit is arranged on the ground of the plant; the hot-stewed slag pit is of a cavity structure with an opening in the top, a pit cover is arranged at the opening top of the hot-stewed slag pit in a matched mode, and one side of the hot-stewed slag pit is connected with an exhaust chimney. And a steel slag magnetic separation comprehensive utilization production line which is higher in efficiency, higher in resource recycling rate and more environment-friendly is planned, so that all steel slag generated by steelmaking is utilized.

The invention relates to the field of amorphous brazing filler metal and brazing, in particular to amorphous foil strip brazing filler metal for titanium and high-nitrogen steel brazing and a preparation method and application of the amorphous foil strip brazing filler metal. The amorphous foil strip brazing filler metal for brazing the titanium and the high-nitrogen steel comprises the following components in parts by weight: 35 to 65 parts of FexTi (100-x) alloy, 30 to 50 parts of Zr and 5 to 10 parts of Fe, wherein the value of x ranges from 10 to 50. The amorphous foil strip brazing filler metal for titanium and high-nitrogen steel brazing is uniform in chemical component, good in wettability, good in toughness, bright and neat in surface, excellent in performance when being used for a brazing joint of titanium and high-nitrogen steel, and not prone to cracking.

The invention provides a method for preparing dimethyl hydroxylamine hydrochloride from waste liquid generated during production of methoxylamine hydrochloride, and relates to the technical field of advanced environmental protection, which comprises the following steps: adding alkali into the waste liquid generated during production of methoxylamine hydrochloride to dissociate methoxylamine hydrochloride and dimethyl hydroxylamine hydrochloride, and then adding an acylation reagent for acylation; adding a methylation reagent for methylation; finally, adding acid for hydrolysis, cooling, dissociating with sodium hydroxide, and distilling to obtain a dimethyl hydroxylamine aqueous solution at 80-90 DEG C; and finally, 37% hydrochloric acid is added into the fraction for salifying, then vacuum concentration is performed, methanol is added into the obtained solid for recrystallization to obtain the dimethylhydroxylamine hydrochloride, resources are recycled, mother liquor generated in industrial production of methoxylamine hydrochloride can be reused, waste of the resources is avoided, and the production cost is reduced. The method comprises the steps of heating reflux hydrolysis, distillation, salification, recrystallization and the like, so that impurities can be effectively removed, and the purity of the dimethylhydroxylamine hydrochloride is improved. And heating reflux hydrolysis is performed for 2-3 hours, so that the reaction is relatively sufficient, and the quality of the subsequently obtained product is higher.

The present invention provides a method for preparing a micromechanical resonator, which includes the following steps: obtaining a substrate structure, wherein the substrate structure is formed with a resonant portion and two electrode portions located on both sides of the resonant portion and spaced apart; growing a sacrificial layer on the substrate structure and patterning it, so as to partially expose the resonant portion and the two electrode portions; depositing a first polysilicon and patterning it, so as to form a resonant structure, an input electrode and an output electrode corresponding to the resonant portion and the two electrode portions, wherein a capacitance gap is formed between the input electrode and the output electrode and the resonant structure; releasing the sacrificial layer under the resonant structure to obtain a resonator wafer; preparing a package cover, vacuum bonding the package cover and the resonator wafer, and forming a MEMS resonator. The vacuum airtightness is ensured, and the overall process is simple and reliable, and high-precision, high-quality, large-scale and low-cost preparation can be achieved.

The present invention is a side-drilling large-diameter casing straightener and its completion pipe string and construction method. The casing straightener in the present invention includes an upper joint, a center pipe and a lower joint. The cylinder body of the straightening cylinder is a rib-shaped cylinder body. The straightening cylinder and the driving cylinder are sleeved on the outside of the center pipe. The timing limit cylinder is installed between the center pipe and the lower joint. The upper part of the center pipe is connected to the upper joint, the lower part of the driving cylinder is connected to the lower joint, and the timing limit cylinder is squeezed between the center pipe and the lower joint. The completion pipe string in the present invention is provided with a floating shoe, a floating hoop and a casing hydraulic hanger. The floating shoe, the floating hoop and the casing hydraulic hanger are connected by casing from bottom to top and lowered into the bottom of the side-drilling well by a drill pipe or an oil pipe. In the completion pipe string above the floating hoop, the side-drilling large-diameter casing straightener is connected by casing according to the design requirements of the completion pipe string. The process of the present invention is simple and reliable, effectively prolongs the service life of the side-drilling well and can produce significant economic benefits.

The invention provides a method for preparing porous ceramic through sol modified SiC particle photocuring, which comprises the following steps: forming a layer of uniform SiO2 coating on the surface of the SiC particle through sol treatment, then preparing the modified SiC particle into photocuring printing slurry, using the photocuring printing slurry to manufacture a SiC green body with a complex shape, and finally preparing the porous SiC ceramic through degreasing and sintering processes. And the SiO2 coating not only can improve the photocuring printing performance of the SiC particles, but also effectively prevents Al and SiC from directly reacting to generate a harmful phase Al4C3 in the subsequent metal infiltration process. The method is simple in process, controllable in parameter, stable and reliable, the obtained porous SiC ceramic has a continuous three-dimensional pore structure, the pore structure and the size are suitable for aluminum melt flowing and complete filling, and the porous SiC ceramic can be used for preparing a high-fraction SiC / Al composite material with a complex structure and has good application prospects. And the application of the photocuring printing technology in the fields of deep-color ceramic printing and complex-structure SiC / metal composite material manufacturing is expected to be widened.

The invention provides an offshore wellhead platform pre-water separation and water injection treatment system, comprising a gas-liquid separator, a pre-water separator, a microbubble generator, an air flotation tank and a self-circulation filter; the inlet of the gas-liquid separator is communicated with an incoming flow pipeline of the offshore wellhead platform, the liquid phase outlet of the gas-liquid separator is connected with the inlet of the pre-water separator through a pipeline, the water phase outlet of the pre-water separator is communicated with the water phase inlet of the air flotation tank through a microbubble generator, the water phase outlet of the air flotation tank is communicated with the water phase inlet of the self-circulation filter through a pipeline, and the water phase outlet of the self-circulation filter is communicated with an external water phase pipeline; the oil phase outlet of the pre-water separator, the oil phase outlet of the air flotation tank and the oil phase outlet of the self-circulation filter are respectively communicated with an external oil phase pipeline through pipelines; the gas phase outlet of the gas-liquid separator is communicated with an external gas phase pipeline through a pipeline, and the gas phase inlet of the microbubble generator and the gas phase inlet of the air flotation tank are respectively communicated with an external gas phase pipeline through pipelines.

The present invention relates to the field of water treatment technology, specifically, to a catalytic ultrafiltration membrane and a preparation method thereof; the catalytic ultrafiltration membrane prepared by the method of the present invention consists of a hollow fiber tube and a separation precision layer, wherein the hollow fiber tube is made of a skin-core type composite catalytic fiber, and the skin layer of the composite catalytic fiber contains catalyst particles with a catalytic decomposition effect of a strong oxidant; when the catalytic ultrafiltration membrane is applied to a double-membrane wastewater reuse process, the separation precision layer can be used to filter out large molecular organic matter, and the catalyst particles loaded in the hollow fiber tube can catalytically decompose the strong oxidant in the effluent water on the clear liquid side of the ultrafiltration membrane, thereby avoiding the strong oxidant remaining in the front-end pretreatment process from damaging the RO membrane, without changing the original process design, adding equipment and reagent investment.

This invention discloses a manufacturing process for a hexagonal flow channel pipe fitting, comprising the following steps: A1: Fabricating two symmetrical semi-circular solid parts, which, when joined together, form a circular part; A2: Creating grooves on the opposing surfaces of the two solid parts, the grooves extending along the length of the solid parts, forming a hexagonal flow channel in the middle when the two solid parts are joined; A3: Creating inclined surfaces on the opposing surfaces of the two solid parts, located on both sides of the grooves, forming a weld seam area between the two opposing inclined surfaces when the two solid parts are joined; A4: Welding and fixing the two solid parts within the weld seam area to obtain the hexagonal flow channel pipe fitting; A5: Welding flanges to the ends of the hexagonal flow channel pipe fitting. This invention can fabricate precisely dimensional hexagonal flow channels inside the pipe fitting, with a simple and reliable process, and the produced pipe fitting meets quality requirements.

The application discloses a PVD device and process method integrating evaporation and sputtering functions. The device creatively adopts a "vacuum sealed tunnel" architecture, linearly connecting multiple chambers such as etching, sputtering and evaporation, to ensure that the substrate is not exposed to the atmosphere throughout the process. The core includes a liftable dynamic sealing evaporation source module, which effectively solves the pollution problem of evaporation process on integrated equipment through the coordinated timing action of bellows connection, lifting mechanism and shielding plate. The device is equipped with a full-automatic control system, realizing one-key completion of complex processes. The application creates a process condition for replacing high-stress sputtering with low-stress evaporation through integration, which is particularly suitable for preparing high-performance solar cell back electrodes, and has the outstanding advantages of eliminating pollution, optimizing stress, improving yield and efficiency.

The present invention relates to the field of oil production technology, and in particular to a device for preventing cold damage in a carbon dioxide driven wellbore and a method for using the device. The technical solution is: an anti-blocking jet pump is connected through an oil pipe and a small-diameter oil pipe, and the anti-blocking jet pump is installed in the middle of the oil well, the lower end of the anti-blocking jet pump is connected to an underground gas-liquid separator through an oil pipe, the lower part of the underground gas-liquid separator is connected to a fin heat exchanger, the lower part of the fin heat exchanger is connected to a step-down degassing heat exchanger, and the step-down degassing heat exchanger is located below the oil layer. The beneficial effects are: not only can the cooling problem in the oil production wellbore caused by heat absorption during the gasification of carbon dioxide be reduced, and the situation of crude oil waxing and ice blocking the liquid flow channel caused by cooling can be avoided, and the corrosion of carbon dioxide to the pipe column can be greatly reduced due to the incorporation of power fluid; in addition, the present invention can backwash the well to dissolve wax and remove blockage, avoid re-operation, and reduce operating costs.