50results about How to "Improve diffusion ability" patented technology

The application discloses an ambient light, a control method and a controller thereof, and a vehicle, and relates to the technical field of vehicles.The ambient light comprises a light guide substrate with opposite first and second ends, and a first light source arranged at the first end of the light guide substrate; wherein the light exit surface of the light guide substrate is provided with microstructures for enhancing the light diffusion capacity, and the microstructures are net-distributed protrusions and / or concave points.Thus, by arranging a single light source at the first end of the light guide substrate and combining the microstructure design of the light exit surface, the diffusion of the microstructures on the light makes the light evenly propagate in the light guide substrate, avoids the high cost and large space occupation caused by densely arranging multiple LEDs in the traditional scheme, and reduces the light source cost and arrangement space of the ambient light; meanwhile, the color control algorithm can be matched to realize the dynamic light effects such as color gradient and brightness breathing of the intelligent cabin.

The application discloses a kind of hydrofining catalyst and its preparation method and application.The method includes the following contents:(1) selecting or preparing alumina 1, introducing hydrogenation active metal into alumina 1;(2) selecting or preparing alumina 2, introducing hydrogenation active metal into alumina 2;(3) the material obtained in step (1) and the material obtained in step (2) are kneaded into final hydrofining catalyst;Wherein, the average pore size of alumina 1 is lower than the average pore size of alumina 2.The hydrofining catalyst prepared by the method can realize deep desulfurization for diesel oil raw material.

The utility model relates to a cooling device of a test board and the test board, the test board is provided with a test area and a controller installation area, the cooling device comprises an insulation heat conduction silica gel pad, a heat dissipation metal layer, a first cooling pipeline, a second cooling pipeline and a cooling pump, the insulation heat conduction silica gel pad is arranged on a controller, and the heat dissipation metal layer is arranged on the first cooling pipeline. The heat dissipation metal layer is arranged on the insulating heat conduction silica gel pad, one end of the first cooling pipeline is arranged on the heat dissipation metal layer, the other end of the first cooling pipeline is connected with the cooling pump, the first cooling pipeline is used for providing cooling liquid for the heat dissipation metal layer under the action of the cooling pump, and one end of the second cooling pipeline is arranged on the heat dissipation metal layer. And the other end of the second cooling pipeline is connected with the cooling pump, and the second cooling pipeline is used for recycling the cooling liquid from the heat dissipation metal layer to the cooling pump. According to the invention, on the premise of maintaining a high-temperature test environment of the tested module, efficient thermal isolation and heat dissipation control can be independently carried out on the controller area, and the temperature of the controller is ensured to be always in a safe range.

The utility model discloses a kind of solid and liquid waste treatment's subcritical system, including subcritical hydrolysis reaction kettle, solid waste feeding mechanism, liquid waste feeding mechanism, steam boiler and solid-liquid separator;The upper portion of subcritical hydrolysis reaction kettle is equipped with feed inlet, gas inlet and exhaust port, the lower portion of subcritical hydrolysis reaction kettle is equipped with discharge port, feed inlet is equipped with feed valve, gas inlet is equipped with inlet valve, exhaust port is equipped with exhaust valve, discharge port is equipped with discharge valve;Solid waste feeding mechanism is used to send solid waste into feed inlet;Liquid waste feeding mechanism is used to send liquid waste into feed inlet;Steam boiler is used to provide high-temperature steam to subcritical hydrolysis reaction kettle;Solid-liquid separator is used to carry out solid-liquid separation to material discharged from discharge port.The utility model realizes the simultaneous processing of solid waste and liquid waste, and can directly carry out solid-liquid separation in the process of reaction kettle discharge.

The invention relates to the field of ionic gel gas separation membranes, and discloses an ionic gel gas separation membrane as well as a preparation method and application thereof. The ionic gel gas separation membrane comprises a double network and ionic liquid, wherein the first network is a cross-linked polymer containing imine bonds, and the second network is a free radical polymerization cross-linked polymer containing quadruple hydrogen bonds. Under the synergistic effect of dual networks, the ionic gel gas separation membrane has good mechanical performance and rapid self-repairing performance after damage, and rapid and effective separation of CO2 / N2 gas is achieved.

This invention provides a composite anode material, its preparation method, and its application. The preparation method includes the following steps: mixing and lithiating graphene material and lithium metal material in a protective atmosphere to obtain lithiated graphene material; wherein both the graphene material and the lithium metal material are in particulate form; mixing the metal material and the lithiated graphene material and heating to obtain the composite anode material. The composite anode material obtained by the preparation method of this invention is a lithium alloyed graphene material, which can guide the uniform deposition of metallic lithium, reduce the probability of lithium dendrite formation, and provide more electron pathways, enhancing lithium diffusion, thereby reducing the gap between the anode material and the solid electrolyte, reducing battery impedance, and improving battery cycle performance and rate performance.

The present application relates to lithium ion battery cathode material preparation technical field, and is a kind of preparation method of nitrogen-phosphorus-potassium co-doped carbon-coated lithium-rich lithium iron phosphate cathode material, comprising the following steps: cocoa powder is added dropwise with acetic acid solution, after reaction, dropwise add hydrogen peroxide, add lithium hydroxide, and the pH of mixed solution is controlled by the amount of deionized water added;After adding deionized water and carbon-coated lithium iron phosphate precursor, stir evenly, vacuum freeze-drying is carried out, and the product is obtained after sintering treatment of dry product in inert atmosphere.Cocoa powder resource is renewable, environment-friendly, and can provide rich nitrogen, phosphorus and potassium elements to complete the doping modification of carbon-coated lithium iron phosphate.The present application provides an environmentally friendly, clean and simple cathode material modification and synthesis idea, and the prepared cathode material has good rate performance and capacity performance.

The present application relates to the technical field of low-temperature negative electrode material preparation of lithium ion batteries, and particularly relates to a silicon-silver-indium ternary alloy thin film negative electrode material for lithium ion batteries and a preparation method thereof, the material comprises 40 at% to 99 at% of silicon, 0.1 at% to 30 at% of silver and 0.1 at% to 30 at% of indium in terms of atomic percentage. The preparation method comprises a melting metallurgy rolling process or a magnetron sputtering deposition process. In the ternary alloy system, the silver improves the electronic conductivity, the indium optimizes the lithium ion diffusion kinetics and the interface stability, and the synergistic effect of the two makes the material exhibit high capacity, high initial efficiency and good rate performance at normal temperature and low temperature. The material system has good compatibility with the above two differentiated preparation processes, and provides a solution for the large-scale and precision application of high-performance silicon-based thin film negative electrodes.

The utility model provides a bin pump for drying desulfurization waste water concentrated solution, which relates to the technical field of desulfurization waste water concentrated solution drying process, and comprises a bin tank, a support mechanism is arranged on the outer wall of the bin tank, and the support mechanism is used for supporting the bin tank; the top end of the bin tank is fixedly connected with a feeding pipe, and the top end of the feeding pipe is connected with an electromagnetic sealing valve through a flange plate. A conveying mechanism is arranged at the bottom end of the supporting mechanism and is used for conveying dried sludge particles; the device comprises a bin tank, the bin tank is internally provided with a dispersing mechanism, the dispersing mechanism comprises a diffusion cover, and the diffusion cover is used for impacting fallen dried sludge particles. And the situation that the dried sludge particles directly, vertically and intensively fall into a discharging opening in the bottom end of the interior, so that the dried sludge particles are pressed and accumulated, and are agglomerated again to influence the conveying of the dried sludge particles can be effectively avoided.

The invention belongs to the technical field of coal mine environment purification, and relates to an underground coal mine filtering type secondary spraying dust removal device and a spraying dust removal method thereof. The device comprises a first branch and a second branch, the first branch comprises an air inlet steel pipe, an air quality filter and a first-stage ultrasonic spraying rod; the tail end of the air inlet steel pipe is connected with a first air inlet branch and a second air inlet branch, and the tail end of the first air inlet branch is connected with a first-stage ultrasonic spraying rod; the first-stage ultrasonic spraying rod comprises a plurality of ultrasonic nozzles; the second branch comprises a water inlet steel pipe, a water quality filter and a secondary cloud spray rod, the tail end of the water inlet steel pipe is connected with a first water inlet branch and a second water inlet branch, and the tail end of the first water inlet branch is connected with a gas conveying pipeline; and the second air inlet branch and the second water inlet branch are connected with the secondary cloud and mist spraying rod. The problems that traditional spraying is low in respiratory dust trapping effect, prone to blockage, difficult to maintain and capable of wetting the ground are solved.

This invention provides a method for preparing a diesel hydrocracking catalyst, comprising the following steps: mixing and kneading a Y-type molecular sieve loaded with a hydrogenation active metal and alumina loaded with a hydrogenation active metal to obtain the final hydrocracking catalyst; wherein the average pore size of the alumina is larger than the average pore size of the Y-type molecular sieve. The catalyst prepared by this method can improve the diffusion performance of macromolecules in low-quality diesel fuel within the molecular sieve channels, enhance catalytic activity, reduce reaction temperature, decrease energy consumption, and extend the operating cycle of the equipment.

The present application discloses an interface layer with high diffusion coefficient, the raw material of the interface layer includes carbon material, organic compound with thioamide group. The interface layer of the present application can effectively reduce the local current density of anode and improve the diffusion ability of Li + The interface layer of the present application can effectively prevent the accumulation of electric charge, promote the diffusion ability of anode and improve the diffusion ability of Li + The interface layer of the present application can effectively prevent the accumulation of electric charge, promote the diffusion ability of anode and improve the diffusion ability of Li The interface layer of the present application can be used in batteries to improve the electrical performance and safety performance of the batteries.

The present application relates to the field of battery production, and more particularly to a diffusion furnace for topcon battery production with uniform diffusion, comprising a furnace body and a furnace door thereon, a mixing bin is installed on the furnace body, a total gas inlet pipe is communicated and installed at the front end of the mixing bin, at least two groups of gas inlet branch pipes are communicated and installed on the total gas inlet pipe, and a stirring mechanism is arranged on the mixing bin, a connecting pipe is installed through between the chamber of the furnace body and the mixing bin, a cover is arranged in the mixing bin, and a power member is arranged on the mixing bin; a shunt bin is fixed in the chamber of the furnace body and is communicated and installed with the connecting pipe, a shunt hole is formed in the bottom wall of the shunt bin, and an adjusting mechanism is arranged in the shunt bin. By adding the total gas inlet pipe, the mixing bin and the stirring mechanism, each group of gas enters the total gas inlet pipe for preliminary mixing through the corresponding gas inlet branch pipe, and then enters the mixing bin for secondary mixing through the working of the stirring mechanism, which is beneficial to the full and uniform mixing of each gas and improves the subsequent diffusion effect.

This application discloses a chimney-type duct heater, comprising a body, a heating duct assembly, and an airflow generating device. The body has an air inlet at its bottom and an air outlet at least on one of the front and two sides of its upper side. The heating duct assembly is vertically arranged within the body and includes: a duct wall forming the vertical duct, a heating element disposed within the vertical duct, the vertical duct connecting the air inlet and outlet, and an airflow generating device for generating airflow from the air inlet to the outlet. This application employs a vertical duct, utilizing bottom air inlet and top air outlet, which conforms to the laws of thermal convection and improves heating efficiency. Because the heating element is arranged within the vertical duct, it can quickly exchange heat with the airflow. The duct and heating device have a simple structure. Furthermore, the air outlet is located on the upper side, which facilitates the diffusion of hot air and prevents direct airflow onto the body, resulting in a better user experience.

The invention discloses a method for preparing MXene through fluoride-free alkali etching of an ultrasonic-assisted supercritical fluid technology, and relates to the field of MXene preparation.Fluorine-free green preparation of MXene is achieved through cooperation of supercritical carbon dioxide fluid and a high-frequency power ultrasonic technology and a fluoride-free etching agent. The preparation method comprises the following steps: introducing carbon dioxide to reach a supercritical state, carrying out an etching reaction in the supercritical state by adopting a stirring or fluid circulation mode, applying continuous or discontinuous high-frequency power ultrasonic treatment to the whole reaction system, recovering to normal pressure and normal temperature after the reaction is finished, collecting a product, washing and drying, thereby obtaining the high-purity silicon dioxide. The high-frequency vibration of the ultrasonic waves and the high diffusivity of the supercritical carbon dioxide are utilized to promote the etching agent to remove A-layer elements in the MAX phase, so that the use of a fluorine-containing etching agent is avoided, the environmental pollution is reduced, and the etching efficiency of the MAX phase is also remarkably improved.

This invention relates to the field of catalyst technology, specifically a magnesium-modified hierarchical ZSM-5 molecular sieve catalyst, its preparation method, and its application. This magnesium-modified hierarchical ZSM-5 molecular sieve catalyst is prepared using the organic template agent N,N-dimethyldipropyltriamine, exhibiting a 90° cross-linked hierarchical structure. This structure enhances the diffusion rate of reactants and products, thereby improving catalytic activity. Furthermore, it possesses a large specific surface area, a short diffusion path, and good stability. The interconnected hierarchical pores of the molecular sieve allow for full utilization of their diffusion characteristics, resulting in excellent catalytic performance in the catalytic cracking of heavy oils. Additionally, the organic template agent used in this invention is significantly cheaper than the template agents used in the synthesis of specially morphological hierarchical porous molecular sieves in current literature, effectively solving the problem of poor catalytic performance and the difficulty in widespread application due to the use of expensive template agents in existing catalysts.

The application relates to a high-strontium mineral water preparation method for improving strontium absorption and application of the same. The method comprises raw water input, pretreatment and purification, two-stage nanofiltration grading purification, strontium concentrate liquid and low-mineral dialysis, constant-temperature targeted chelation reaction, chelated strontium mother liquor, sterile blending, calcium-strontium ratio precise control, improvement of strontium absorption and utilization, double strategies of calcium-strontium ratio lock control and ion removal, solution of competition of calcium and magnesium ions on strontium absorption from the root, mild reaction in the whole process, no high temperature and high pressure, no introduction of harmful by-products, all raw materials meeting national food safety standards, no taste difference, no peculiar smell and no astringency.

The utility model relates to the technical field of lithium ion battery especially, it relates to current collector and negative pole piece. The current collector in the negative pole piece includes foil, first structural layer and second structural layer, the foil is provided with first through -hole, first structural layer is provided with second through -hole, the both ends fixed with foil of first structural layer along the thickness direction, the projection of first through -hole and second through -hole along the thickness direction coincides, first through -hole and second through -hole constitute the through -cavity for accommodating slurry, second structural layer is fixed on any one of two foils, second structural layer is fixed on the end face of corresponding foil away from first structural layer along the thickness direction, second structural layer blocks first through -hole, the foil without fixed second structural layer has first coating surface away from first structural layer along the thickness direction, the foil with fixed second structural layer has second coating surface close to second structural layer along the thickness direction, and first coating surface and second coating surface carry out coating processing in proper order.

The utility model provides a kind of ceramic heating device for heating table, comprising: outer cover, its lateral wall is evenly provided with several through holes one;Heating disc, its quantity is at least provided with two, one of which is fixed on the inner cavity upper position of outer cover, is configured as cooking utensil can be placed in the heating disc, heating food;The rest heating disc is set in the middle position of outer cover inner cavity, is configured as emitting heat and makes heat outward diffusion through through hole one;The utility model is by setting multiple heating disc and multiple conical cover structure in heating table interior, form multilayer heat conduction and diffusion structure, so that heating device not only has traditional heating function, cooking utensil can also be placed on the upper heating disc, to meet the multiple scene use demand of barbecue, hot pot etc., significantly improve the diversity of use function;The conical cover structure set can quickly reflect heat to the outside of outer cover, is beneficial to improve the effect of heat diffusion, and the heating effect is better.

This invention discloses a vaccine separator and its working method that utilizes vapor phase to achieve self-sterilization and cleaning functions. It relates to the field of vaccine separator technology and employs steam cleaning during the cleaning process of the vaccine separator. The principle behind this method is that vapor media have better permeability and diffusion than liquid media, and also possess superior heat dissipation and evaporation effects, resulting in better inactivation of residual bacteria during the separation process. Based on these aspects, a dual-path vapor-liquid structure is proposed, which, in essence, performs targeted and localized cleaning actions based on the injection method of the bacterial mixture during the separation process. This requires real-time interaction between the temperature and pressure environments inside the vessel according to the high-temperature steam injection process, ultimately aiming to improve the overall cleaning effect.

The application relates to the field of solar cells, and discloses an anti-epitaxial layer, a preparation method thereof, a heterojunction solar cell and a photovoltaic module. The anti-epitaxial layer is applied to the heterojunction solar cell, and the preparation method comprises the following steps: introducing a silicon hydride compound gas source into an environment with a silicon substrate to perform gas phase deposition, and applying a first bias voltage and a second bias voltage in the process of the gas phase deposition to prepare the anti-epitaxial layer on the surface of the silicon substrate; wherein the first bias voltage is configured to generate an electric field, and the second bias voltage is configured to uniformly regulate and control the electric field distribution generated by the first bias voltage; wherein a structural formula of the silicon hydride compound gas source comprises Si n H 2n+2 , and n is a positive integer greater than or equal to 2. The preparation method disclosed by the application can be used to prepare an anti-epitaxial layer with high film layer quality, and can effectively optimize the photoelectric conversion efficiency of the heterojunction solar cell.

This application discloses a method and apparatus for predicting and controlling dissolved gas precipitation at the end of brine discharge in a salt cavern gas storage facility, comprising the following steps: acquiring basic data required for prediction and control at the end of brine discharge; establishing or calling a table of equilibrium solubility data of the stored gas in the brine based on the composition, pressure, temperature, and salinity of the stored gas; determining the initial dissolved gas state of the brine at the interface, using the boundary condition that the brine and stored gas reach dissolution equilibrium at the gas-liquid interface of the salt cavern; establishing a coupled calculation model of dissolved gas precipitation and wellbore gas-liquid two-phase flow during the brine return process to predict the gas phase volume fraction of the fluid returning from the wellhead; generating a safe operating envelope diagram of back pressure-discharge rate at different gas-liquid interface positions, using the wellhead back pressure as the main control variable and the brine discharge flow rate as the auxiliary correction variable, with the wellhead back pressure as the main control variable and the brine discharge flow rate as the auxiliary correction variable; and outputting a suggested point for terminating brine discharge when any wellhead safety constraint cannot be met.

The utility model relates to the technical field of bonding equipment provides a copper diffusion mechanism, including pressure mechanism and bearing cavity, the pressure plate of pressure mechanism sets up the top of bearing cavity, a plurality of pressure head posts of pressure plate sets up the lower part of pressure plate. Good contact is favorable to copper atom under the action of pressure more smoothly diffuses, improves the effect and consistency of diffusion.

The invention relates to the technical field of electronic equipment thermal management, in particular to an electronic equipment thermal buffer device suitable for missile-borne, spacecraft and other environments facing extreme high thermal load and severe temperature fluctuation. Comprising a packaging base body and a phase-change material, a partition plate is fixedly installed in the packaging base body and on one side of the phase-change material, a pressing plate is arranged on one side of the partition plate, and a spring winding type wire pulling device is arranged on the other side of the partition plate; the clockwork spring winding type wire pulling device comprises a reel for winding a pulling wire, a first bevel gear fixedly mounted on the reel, and a clockwork spring in transmission connection with the first bevel gear; a through hole is formed in the center of the phase change material, and a pulley is arranged on the inner wall of the packaging substrate corresponding to one end, far away from the pressing plate, of the through hole; the pull wire penetrates through the partition plate, the pressing plate and the through hole and bypasses the pulley, and the tail end of the pull wire is fixedly connected to the pressing plate. The device operates completely based on the mechanical energy storage principle, the transmission mechanism is efficient and stable, the heat conduction efficiency and the interface heat exchange capacity are high, and the heat dissipation performance consistency is good.

The application provides a blockchain data sharing method and system based on identity signature and SM4, and belongs to the technical field of data encryption. The method comprises the following steps: at a data collection end, performing certificateless identity authentication on an original file to be shared; performing encryption on the original file by using a national secret SM4 symmetric encryption algorithm to obtain an encrypted file; uploading the encrypted file to an IPFS distributed file system to obtain a corresponding content identifier CID; taking a device identity identifier, an original file fingerprint, a digital signature and the CID in the minimum signature package as anchor point information, and writing the anchor point information into a blockchain based on a DPOS consensus mechanism; and reading the anchor point information from the blockchain by a verification party, downloading the encrypted file from the IPFS according to the CID, and decrypting to obtain the original file. The application realizes trusted on-chain data, safe transmission and controllable sharing.

This invention relates to the field of material mixing, specifically a material mixer that facilitates internal cleaning. It includes a mixing drum and a position adjustment mechanism slidably mounted on the top of the mixing drum, comprising a component mounting cylinder and a sealing cap; and a stirring and cleaning mechanism comprising: a movable plate placed inside the component mounting cylinder; mounting ears placed on both sides of the outer wall of the component mounting cylinder, with a second telescopic rod embedded in the mounting ear, the bottom of the second telescopic rod connected to the movable plate; a rotating shaft rotatably mounted on the movable plate; a first connecting cylinder, the bottom of which is connected to a second connecting cylinder via a connecting rod; and a movable frame, both ends of which are inserted into the first and second connecting cylinders respectively, with a drainage recess and passive stirring blades inside the movable frame. This invention effectively facilitates the stirring and mixing of materials and the cleaning of impurities adhering to the inner wall of the mixer, thereby facilitating machine operation.

The application provides a preparation method of a lithium manganese iron phosphate positive electrode material and the lithium manganese iron phosphate positive electrode material. The preparation method comprises the following steps: mixing a lithium manganese iron phosphate precursor and a COF-5 covalent organic framework material to obtain a first mixture, the COF-5 covalent organic framework material has a porous hole structure and contains carbon elements and active functional groups; and performing first sintering on the first mixture, so that the lithium manganese iron phosphate precursor is converted into a lithium manganese iron phosphate matrix, the COF-5 covalent organic framework material is carbonized to form a porous carbon coating layer, and thus the lithium manganese iron phosphate positive electrode material is obtained. The positive electrode material obtained by the preparation method has a uniform surface coated with a porous carbon layer formed by carbonization of COF-5, the coating layer retains an ordered porous structure, can improve the electronic conductivity and lithium ion diffusion capacity of the material, inhibits manganese dissolution and interface side reactions in high-temperature cycles, and improves particle dispersity and particle size consistency.

The invention relates to a chip top cover type heat dissipation device based on a phase change heat transfer mechanism, which comprises a top cover, a jet plate, a phase change bottom plate and a core carrier plate which are sequentially stacked from top to bottom and are in sealed connection, a chip is mounted on the core carrier plate, the bottom of the phase change bottom plate is attached to the surface of the chip, the interior of the phase change bottom plate is hollow, and a first phase change cavity is formed in the interior of the phase change bottom plate; a second phase change cavity is defined between the jet flow plate and the phase change bottom plate, the top cover is provided with a top cover groove used for containing the jet flow plate, the phase change bottom plate and the chip, and the top cover is provided with a first connector and a second connector which are used for installing the connector so that inflow and outflow of the cooling working medium can be achieved. Compared with the prior art, the integrated design of cooling and heat diffusion functions is realized in a limited space, the overall heat resistance between a chip and a heat dissipation interface is effectively reduced, the working medium circulation and heat diffusion process can be accelerated, the heat dissipation efficiency and temperature uniformity of a chip area are remarkably improved, and the heat dissipation efficiency of the chip area is improved. And the compact and efficient heat dissipation requirements of the high-heat-flux chip are met.

The utility model discloses a dust falling test chamber dust uniform diffusion device which comprises a dust falling test chamber body, an interlayer is arranged in the dust falling test chamber body, an electromagnetic coil is arranged in the interlayer, the inner wall of the dust falling test chamber body is fixedly connected with a supporting frame, the supporting frame is of a rectangular structure in an overhead view, the supporting frame is of a hollow structure, and the supporting frame is of a hollow structure. The top side of the supporting frame is fixedly connected with a sleeve seat, the top of the supporting frame is movably connected with a test article placing net, the electromagnetic coils are arranged in a bilateral symmetry mode about the bisector of the test article placing net, the top end of the dust fall test box body is provided with a powder box, a discharging pipe is obliquely arranged in the powder box, and a high-pressure fan is arranged on the inner side of the discharging pipe. The bottom of the powder box is connected with a connecting pipe, the lower end of the connecting pipe is connected with the dust fall test box body, and the top end of the connecting pipe corresponds to the discharging pipe and the high-pressure fan in position. The device can realize uniform diffusion of the powder, so that a test sample is ensured to be in uniform contact with the powder, and the test precision is improved.

The present application relates to the preparation of composite membranes and the separation of methanol dehydration technology, aiming at providing a preparation method of zinc ion hydrophilic metal organic framework mixed polyvinyl alcohol composite membrane. Including: Zn(NO3)2.6H2O, PVP and 2-cyano imidazole are reacted, and the reaction product is sequentially subjected to amidation modification and hydroxyl modification reaction to obtain a zinc ion hydrophilic metal organic framework, which has a microstructure of being externally modified by hydroxyl and amide groups and internally hollow; polyether sulfone ultrafiltration membrane is used as a support membrane, polyvinyl alcohol solution containing the organic framework is dried on the upper part of the support membrane to form a polyvinyl alcohol mixed matrix membrane, and the composite membrane is formed by cross-linking at the contact interface. The present application can preferentially adsorb water molecules and improve the solubility of water in the membrane; water molecules can be selectively passed through, effectively improving the permeability and selectivity of the polyvinyl alcohol membrane to water, and high-purity methanol products can be obtained after cyclic dehydration; by adding MOF fillers and interfacial cross-linking, the present application can maintain good mechanical, chemical and thermal stability.