222results about How to "High degree of separation" patented technology

The invention provides a self-adaptive localization method, equipment and system which adopt a TOA and RSS fusion mode. The self-adaptive equipment comprises an observation result collector for collecting results of the TOA and the RSS of signals sent by an object, a TOA result counter for determining the number of the TOA results, and a position counter for selectively calculating the strategy of the position of the object and calculating the position of the object according to the selected strategy. The equipment can select the position strategy in a self-adaptive mode according to the number of the TOA results. Compared with the prior art, the self-adaptive method, equipment and system have the characteristics of self-adaptivity, reliability, accuracy, expandability, low cost, and the like.

A separating device (3) for separating particles from an intake air (2) of an internal combustion engine, comprising two cyclone cells (5, 6) which are designed to cause two raw air streams (7, 8) containing the intake air (2) to rotate oppositely and a discharge device (49) which is designed to guide an exhaust air stream (35, 36) containing the particles tangentially away from a respective cyclone cell (5, 6) and to combine the exhaust air streams (35, 36) to a common exhaust air stream (53).

The invention relates to a comb tooth type ricinus communis combine harvester with fruit picking and straw fixed length fixed quantity and bundling functions. The combine harvester is reasonable in structure and integrates picking, separating and cleaning of castor seeds with fixed length segmentation, fixed quantity compaction and automatic bundling of straw. A comb tooth picking system and a feed-in disc type header system are located at the front end of a harvester body, a separating and cleaning system and a hob type fixed length segmentation system are located at the middle end of the harvester body, and fixed quantity compaction and bundling systems are located at the rear end of the harvester body; a comb tooth picking device which rotates anticlockwise is adopted for the comb tooth picking system to pick off the castor seeds and send the castor seeds to the separating and cleaning system, the castor seeds after being collected and separated through a grain collection bin are arranged below an outlet of the separating and cleaning system, a divider is arranged in the front of the harvester body, ricinus communis straw is fed into the disc type header system, the cutoff straw is fed into the hob type fixed length segmentation system through a stalk lifting conveyer belt, and an outlet of the hob type fixed length segmentation system is connected with the fixed quantity compaction and bundling systems; all the systems are driven by a power device through corresponding transmission devices.

The invention provides a method for repairing and regenerating a nickel cobalt manganese ternary positive electrode material in a waste battery. The method comprises the following steps: splitting an positive electrode material from a lithium cobalt oxide waste battery; laying the ternary positive electrode material on a mesh belt, controlling the mesh belt to continuously vibrate, and controlling gas to pass through meshes of the mesh belt from bottom to top; under the conditions that the mesh belt vibrates and gas flows through the meshes of the mesh belt, respectively heating a ternary positive electrode slice at the temperature of 100 to 300 DEG C and the temperature of 380 to 520 DEG C for 10 to 60 minutes, and collecting ternary positive electrode material powder I; sequentially sieving the ternary positive electrode material powder I to remove a broken aluminum foil and performing electromagnetic iron removal on the ternary positive electrode material powder I to obtain ternary positive electrode material powder II, and performing ball milling on the ternary positive electrode material powder II to obtain ternary positive electrode material powder III; dissolving aluminum powder by the ternary positive electrode material powder III under the condition of weak acid, corroding the surface of the ternary positive electrode material to form the ternary positive electrode material with high activity and high dispersity, and synthesizing and repairing the ternary positive electrode material serving as a nucleating agent to obtain a spherical ternary precursor material with uniform particles. The size mixing and coating properties and electrochemical properties of the spherical ternary precursor material prepared by the method provided by the invention are repaired.

The invention discloses a remote-sensing image variation detecting method based on slow characteristic analysis. A slow characteristic analysis approach is introduced in the detection of multi-temporal remote-sensing image variations; in the slow characteristic analysis approach, the space corresponding relation between the multi-temporal remote-sensing images is completely taken into account, and the original theory aiming at continuous signal analysis is developed into a variation detecting algorithm based on a discrete data set. By utilizing the slow characteristic analysis approach, invariant characteristics can be extracted from a multi-temporal remote-sensing image data set to serve as a characteristic space; in the characteristic space, the spectrum difference between the multi-temporal remote-sensing images is restrained, and true variation is highlighted, so that the variation detection accuracy can be enhanced. The slow characteristic analysis approach is simple to perform and high in arithmetic speed.

An electric device mounting type tool storage case that is easily transported together with other electric devices such as audio devices in addition to an electric tool body and can stand against contamination such as dust in the work site. An audio device as an electric device can be stored in the tool storage case which is used as an enclosure of a pair of speakers. Storage portions disposed in the tool storage case are partitioned by partition walls into a pair of sound channel spaces. In addition, a power switching circuit of an AC-DC converter power supply circuit or a battery DC power supply is formed in the tool storage case, and power wiring lines or inner wiring lines are disposed along the partition walls. While a cover case closes a storage case, electric devices such as an audio device or a charger are operated.

The invention relates to a regenerating process technology for producing high quality low-pour-point lubricant base oil by the full hydrogen method of waste lubricant oil. The process technology comprises the following steps: firstly, performing predistillation and atmospheric flashing on the waste lubricant oil to remove water and pulling out light oil, and then performing propane refining to remove the vast majority of impurities and additives in the oil; performing a hydrogenating reaction on the lubricant oil fraction without water and impurities and hydrogen under the action of a catalyst after being mixed, and performing gas liquid separation to obtain a liquid which enters a stripping tower to divide, thereby obtaining naphtha and light diesel oil from the top of the stripping tower; and feeding the pre-heated product in the bottom of the stripping tower into an isomeric pour point depression reactor and a compensating refining reactor, and separating light oil and the lubricant base oil from the reaction product through a fractioning device. The regenerating process technology provided by the invention is environment-friendly and pollution-free; the regenerating recovery of waste oil reaches up to 99% or above; the oxidizing stability and light stability of the base oil are remarkably improved; the product is good in quality and high in additional value; and therefore, the regenerating process technology has a very good market application prospect.

The invention provides a method for reparative regeneration of a lithium cobalt oxide anode material in waste batteries. The method includes: separating the anode material from lithium cobalt oxide waste batteries; laying positive pole pieces on a mesh belt, and controlling the mesh belt to vibrate continuously while controlling gas to pass through the meshes of the mesh belt from bottom to top; under conditions of vibration of the mesh belt and gas circulation of the meshes of the mesh belt, respectively heating the positive pole pieces for 10-60min at 100-300 DEG C and 380-520 DEG C, and collecting anode material powder I; sequentially subjecting the anode material powder I to screening removal of broken aluminum foils and electromagnetic removal of iron to obtain anode material powder II, and sampling to detect contents of Li, Co and Al in the anode material powder II; replenishing Li element and Al element to the anode material powder II according to a detection result obtained at the step 4 to obtain anode material powder III, wherein a mole ratio of Li to Co to Al is 1-1.05:1-x:x, and x refers to 0.05-0.2; subjecting the anode material powder III to ball milling in a high-energy ball mill to obtain anode material powder IV; calcining the anode material powder IV in a pure oxygen atmosphere to obtain repaired regenerated lithium cobalt oxide.

The invention discloses a singing separation method using melody extraction and speech synthesis technology. The method comprises the following steps: performing a main melody extraction operation ona given input audio to obtain a main melody and a note duration of a song; establishing a speaker speech library and performing HMM (Hidden Markov Model) training to obtain a speaker speech library feature model; extracting pronunciation characteristics of the input audio, and completing speaker timbre conversion; and outputting speech by using a given lyric text through a TTS (Text-to-Speech) technology, and synthesizing in combination with information of the extracted melody, the note duration and the like to obtain a final human voice audio. The human voice is simulated through synthetic speech, and compared with the traditional singing separation method, accompaniment information after separation can be greatly reduced.

A mixer (100) for a continuous flow reactor (330) and methods for forming the mixer and the operation thereof. The mixer allows for segmentation of a primary reactant flow through a plurality of ports (124) into many smaller flows that are injected as jets into a secondary reactant flow in channels of the mixer. The channel (126) has a constant width dimension to enhance even flow distribution and local, turbulence of the primary and secondary reactant flows. The constant width dimension of the channel and the size and number of the ports of the mixer can be configured to ensure the primary reactant flow injected into the channel directly impinges on a surface (116) of the channel that is opposite the injection point at normal operating conditions.

The invention belongs to the field of edible oil products, and in particular relates to DHA-containing corn oil special for pregnant and nursing women and a preparation method thereof. The invention adopts the technical scheme that the corn oil special for the pregnant and nursing women contains DHA. The corn oil comprises the following components in percentage by weight: 0.8 to 2.5 percent of DHA and EPA in a total amount and the balance of corn oil, wherein the weight part ratio of the DHA to the EPA is 5 to 4. The invention also provides a preparation method for the corn oil special for the pregnant and nursing women. The corn oil provides more nutrient substances for the pregnant and nursing women, and balances the nutrient composition in the grease so that the nutrient components therein are closer to the nutrient structure of the human body and can meet the requirement of brain growth of embryos and nursing children for the DHA.

A process system for washing desalination and oil-water separation comprises a premixing washing system, a pre-separation system, a light phase separation system and a heavy phase separation system; the premixing washing system comprises a mixer and a fiber membrane washing assembly, and the pre-separation system comprises a feeding tube, a hollow filter element and a steady flow zone; the light phase separation system sequentially comprises a material uniform distributor I, an upper coalescence separation zone and a light phase discharge port from bottom to top; and the heavy phase separationsystem sequentially comprises a material uniform distributor II, a lower coalescence separation zone, a light phase and heavy phase separation zone and a heavy phase discharge port from top to bottom. The separation system can be used to achieve full dissolution of salts in a material to be separated, rapid removal of free water drops and demulsification and coalescence of a small amount of a heavy phase entrained in a light phase and a small amount of the light phase entrained in the heavy phase, has the advantages of short material residence time, high salt washing / dehydration efficiency and small device size, has significant deep desalination and dehydration effects especially on high-viscosity and high-salt severely emulsified oil products, and enables the moisture removal rate of theoil products to reach 99% or above and the salt content to be less than 3 mg / L.

The invention discloses a separating and recycling method for an atom transfer radical polymerization catalyst. The separating and recycling method is characterized by comprising the following steps of adding a radical polymerization monomer, an initiator, a catalyst, a ligand, a reducing agent, a first solvent and a second solvent into a reaction vessel, wherein the monomer is an MMA (methyl methacrylate) oil-soluble monomer, the initiator is selected from 2-bromoisobutyryl ethyl ester and ethyl 2-bromopheny lacetate, the reducing agent is azobisisobutyronitrile, the first solvent is polyethylene glycol 200, and the second solvent is selected from methylbenzene or dimethylbenzene; heating the reaction system to reaction temperature to enable the first solvent and the second solvent to mutually dissolve; carrying out atom transfer radical polymerization reaction under a homogeneous phase; after the reaction is ended, cooling to room temperature to enable the first solvent and the second solvent to be layered; separating two phases to enable the catalyst and the ligand to exist in the first solvent and a polymer to exist in the second solvent so as to realize the separation and recycling of the catalyst.

The invention discloses a method for separating and enriching lithium, aluminum and silicon from fly ash. The method comprises the following steps: (1) pretreating fly ash; (2) carrying out low-temperature alkali dip reaction on the treated fly ash, aids and a sodium hydroxide solution, and filtering; (3) washing the filter residue, removing the impurities, filtering, and drying to obtain calcium silicate; (4) regulating the pH value of the filtrate to alkalinity, separating the lithium / aluminum-containing filtrate to obtain a sodium metaaluminate concentrated solution and a lithium-rich solution, carrying out reverse osmosis on the lithium-rich solution to obtain a lithium concentrated solution, and mixing the sodium metaaluminate concentrated solution with the lithium / aluminum-containing filtrate to obtain a refined solution; (5) precipitating the sodium metaaluminate refined solution, filtering to obtain aluminum hydroxide, and calcining to obtain the aluminum oxide finished product; (6) treating the lithium-rich solution to obtain a lithium-rich concentrated solution and fresh water; and (7) carrying out carbonating precipitation on the lithium-rich concentrated solution, filtering, and drying to obtain the lithium carbonate finished product. The method is a short-stage extraction process, reduces the lithium loss, and implements separation, enrichment and extraction of calcium silicate, aluminum oxide and lithium carbonate.

The invention belongs to the field of rice oil processing, and provides a preparation process of nutritional rice oil rich in oryzanol and vitamin E. The preparation process is mainly characterized in that a conventional rice oil refining process is improved, technological processes of crude rice oil filtering, compound degumming, dewaxing, molecular distillation, degreasing and obtaining of finished product rice oil are adopted, and nutrient substances such as oryzanol, vitamin E and the like in rice oil are reserved to the greatest extent.

The invention discloses a sand beach garbage sieving and transmission integrated device and relates to sand beach cleaning equipment. The sand beach garbage sieving and transmission integrated device is provided with a sand shovel, a conveying belt, a transmission belt pulley, a conveying belt motor, a sand spit, an inner sieve drum, a bottom sieve tray, spiral sieving blades, a bottom sieve tray belt pulley, a spiral sieving blade belt pulley, a blade motor, a separator, a sand-proof outer bucket, a refuse hopper push rod, a frame, a refuse hopper and a top cover; the sand shovel is fixedly connected to one end of the conveying belt; the other end of the conveying belt is fixedly connected with the sand spit; the bottom sieve tray is in running fit with the sand-proof outer bucket; the inner sieve drum is fixedly connected to the inside of the sand-proof outer bucket; the separator is arranged at one side of the inner sieve drum; the spiral sieving blades are nested on a center shaft arranged on the bottom sieve tray by a hollow shaft; the bottom sieve tray belt pulley and the spiral sieving blade belt pulley are arranged at the top of the center shaft arranged on the bottom sieve tray; the blade motor is arranged on the frame; an output shaft of the blade motor is provided with a driving belt pulley; the driving belt pulley is connected with both the bottom sieve tray belt pulley and the spiral sieving blade belt pulley; the refuse hopper is positioned behind the sand-proof outer bucket, and is hinged to the frame; the refuse hopper push rod is hinged to the refuse hopper.

The invention discloses an extraction method of algae iodate, and belongs to the fields of algae processing and food or feed additives. The method comprises the following steps: with brown alga as a raw material and water as an extracting liquid, carrying out multistage countercurrent extraction, carrying out vacuum concentration on the extracting liquid at 55-65 DEG C into a clear liquid, and stopping heating and concentrating when the specific gravity is 1.30-1.40; carrying out primary centrifugal separation when the clear liquid is hot to remove a high-temperature salt; cooling and removing a concentrated liquid of the high-temperature salt; carrying out secondary centrifugal separation, and removing excessive crude mannitol to obtain the concentrated liquid; and adding chitosan to remove heavy metal and arsenic in the concentrated liquid, and centrifuging, so as to obtain an algae iodate extracting liquid. The algae iodate extracted by the method is low in heavy metal content, and high in extraction rate; and meanwhile, a composite algae iodate salt additive prepared from the components such as algae iodate composite potassium iodide, potassium chloride and glutamic acid extracted by the method is good in heat stability.

The invention relates to a preparation method for light-pyrolysis carbon black. The method comprises the following steps: 1) subjecting waste rubber to light pyrolysis in a combined extruding apparatus composed of a screw with a temperature in a range of room temperature to 280 DEG C and a screw rod with a temperature in a range of 280 DEG C to 350 DEG C; 2) subjecting pyrolysis products to dissolving, extracting and separating with solvents; and 3) carrying out crushing and drying on a residual product obtained after extraction so as to obtain light-pyrolysis carbon black, wherein the surface of the obtained light-pyrolysis carbon black has bonding glue and zinc oxide, and the carbon black can form high-content bonding glue with novel rubber. Compared with the prior art, the preparation method is environment-friendly; the obtained carbon black can be perfectly bonded with rubber and has excellent reinforcing performance; and the method is a novel method for recovery and high-added-value utilization of waste rubber.

The invention discloses a supercritical extraction method for rose essential oil. The supercritical extraction method comprises the steps of cleaning, freeze-drying, supercritical extraction and molecular distillation. The supercritical extraction method is low in operation temperature, short in heating time, capable of avoiding the oxidization and rancidification of oil caused by a high temperature, high in separation degree and product yield, and capable of lowering the acid value of the oil due to the molecular distillation; the supercritical extraction method realizes the purposes of efficient extraction, separation, no impurities and high extracted product purity, has a simple operation process and a short extraction time, reduces the cost, and increases the production efficiency.

The invention discloses an organic-inorganic hydrid film used for pervaporation separation of a methanol / methyl acetate azeotropic system and a preparation method thereof. The preparation method comprises the following processes of: (1) heating and stirring polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), a 4A molecular sieve and a solvent of dimethyl sulfoxide according to proportions in a constant-temperature water bath to obtain a PVA / PVP / 4A molecular sieve mixing solution; and (2) weighing DAS (Dialdehyde Starch) according to a proportion, dissolving into the dimethyl sulfoxide, stirring in a dark place and dissolving, then adding the equivalent PVA / PVP / 4A molecular sieve mixing solution obtained in the step (1) to the solution, and uniformly stirring to obtain a casting film solution. The casting film solution is filtered and defoamed, and then the film is scraped from glass and dried. The dried film is placed below a high-pressure mercury lamp and irradiated for 30-60 min toensure that coupling reaction is completed so as to obtain a 4A molecular sieve-filled DAS-crosslinking polyvinyl alcohol / polyvinylpyrrolidone organic-inorganic hydrid film. The organic-inorganic hydrid film has favorable mechanical strength and chemical stability and a higher pervaporation separation coefficient and can effectively break azeotropic components and has better separation degree than the traditional method.

The invention discloses a method for preparing a high-purity cardanol. The method comprises a process of extracting a cardanol from a natural cashew nut shell liquid with a molecular still, wherein the molecular still consists of a cylindrical shell, a rotor and a built-in condenser, the lower part of the cylindrical shell is provided with a heater, a fixed frame is provided with a film blade and an antispray device; the natural cashew nut shell liquid is poured into the cylindrical shell from the top and the rotor is rotated between the cylindrical shell and the condenser at the same time to distribute the natural cashew nut shell liquid on a heating surface of the cylindrical shell continuously and evenly; and the film blade is used to spread the feed liquid to a layer of turbostratic liquid film and the film blade is used to spirally push the turbostratic liquid film to the built-in condenser to cool the turbostratic liquid film into a liquid; finally the liquid flows down along a pipe of the condenser and is discharged from a discharge pipe to obtain the high-purity cardanol. The method can improve the yield and purity of the cardanol.

The invention discloses a preparation method of citrus essential oil series products. The method comprises the following steps: 1) citrus peel pretreatment: cleaning fresh citrus peel, removing impurities, airing and dicing; 2) squeezing and extracting: performing cold pressing on the orange peel to extract oil; 3) extraction by an ultrasonic-distillation method: firstly treating by an ultrasonicdevice, and then distilling to extract essential oil; 4) dehydration and impurity removal: adding a drying agent for dehydration; and 5) low temperature concentrated distillation: carrying out concentration and terpene removal with a rotary distillation device to obtain concentrated citrus essential oil and limonene. According to the method, the extraction rate of the citrus essential oil is increased, the quality of the citrus essential oil is improved, and the method is low in cost, easy to operate and suitable for industrial large-scale production.

The invention belongs to the field of organic photoelectric devices and discloses an electroluminescent polymer based on a thiodibenzofuran-bithiophene unit and a preparation method and application thereof. The thiodibenzofuran-bithiophene unit in the electroluminescent polymer is of seven-membered polycyclic structure, having good planarity, thereby facilitating injection and transport of carriers and improving photoelectric properties of the material herein; the fused ring structure imparts good rigidity to the thiodibenzofuran-bithiophene unit, heat resistance of the material can be improved, and the practical requirement on the material is met; a strongly electrically negative group-sulfone group imparts high electron-absorbing capacity to the thiodibenzofuran-bithiophene unit, and intramolecular charge transfer occurs between the strongly electrically negative group-sulfone group and an adjacent group, spectral red shift is caused, and a luminescent material with expected color coordinates is attained. The electroluminescent polymer based the thiodibenzofuran-bithiophene unit prepared by Suzuki polymerization has good solubility, can be dissolved with common organic solvents,and can be made into a light-emitting diode light-emitting layer through spin coating, inkjet printing or film printing.

The invention discloses a solid-liquid separation device for chemical production. The device comprises a filter and a dryer. The filter is installed at a vertical axis position inside the machine body, a driving motor is installed at the top of the machine body, the driving motor is in drive connection with the filter through a driving main shaft, feed pipes are installed on both sides of a truncated cone at the upper part of the machine body, the feed pipes are communicated with the filter, the outlet of the dryer is communicated with a discharge valve through a pipeline, a liquid collectingtank is installed outside a feed delivery pipe, a circulating pump is installed in a protection cover mounted on one side outside the machine body, the inlet of the circulating pump is communicated with the inside of the liquid collecting tank through a pipette, the outlet of the circulating pump is connected to a small filter through a pipeline, and a steam port of the dryer is connected to a condenser through an air duct. The solid-liquid separation device for chemical production provided by the invention can filter solids of different particle sizes by adjusting the diameter of filter casing meshes, at the same time can dry the solids obtained by solid-liquid separation, thus improving the solid quality.

The invention discloses an adjustable potato harvester, belongs to the field of agricultural machinery, and overcomes the defects of the prior art through hydraulic control and adjustment. The structure of the adjustable potato harvester mainly consists of a traction device, a rack, comprehensive adjusting oil cylinders, a stalk separating device, a second-stage soil-potato separating adjusting oil cylinder, a second-stage soil-potato separating and conveying device, a first-stage soil-potato separating and conveying device, a digging shovel, a digging shovel adjusting oil cylinder, a hydraulic oil tank and the like, wherein the comprehensive adjusting oil cylinders are located on the two sides of the stalk separating device; the second-stage soil-potato separating adjusting oil cylinder is located at the rear section of the rack, the fixed end of the oil cylinder is located on the oblique beam of the rack, and the movable end is connected with the two ends of a driving part of the second-stage soil-potato separating and conveying device; the digging shovel is located at the lower end of a front beam of the rack and connected with the first-stage soil-potato separating and conveying device; the digging shovel adjusting oil cylinder is located at the angle adjusting end of the digging shovel; and the hydraulic oil tank is located in front of the rack. The adjustable potato harvester is wide in application range and easy to operate, and the harvesting efficiency of the harvester and the product quality are improved.

A stereo decoding system comprises an oscillator, a bandpass filter, a PLL unit and a stereo decoder. The oscillator generates a first signal with a center frequency. The bandpass filter receives a stereo multiplexed signal and the first signal to filter out a pilot signal. The PLL unit receives the pilot signal to generate a PLL output signal. The stereo decoder receives the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.

The invention relates to a preparation method of methylphenylcarbamate. The preparation method comprises 1, adding urea and aniline into a pre-reactor and a diphenyl urea synthesis reactor and synthesizing diphenyl urea, 2, conveying the reaction liquid into a falling film evaporator and an evaporating crystallizer through a feeding pump, separating aniline, mixing the aniline and methanol, feeding the mixture into an alcoholysis reactor, carrying out a reaction process, feeding the reaction materials into a flash evaporation pot, separating a part of methanol and aniline and separating residual methanol and most of aniline through the falling film evaporator to obtain a methylphenylcarbamate crude product, and 3, feeding the methylphenylcarbamate crude product into a scraped film type molecule distillation device and further separating the residual microscale aniline and high-boiling residues so that high purity methylphenylcarbamate is obtained and has purity greater than or equal to 99.9%. The preparation method effectively improves methylphenylcarbamate synthesis efficiency and has a product yield greater than or equal to 98.0%. The preparation method is simple and easy and provides an effective synthesis and separation method of a phenyl carbamate intermediate used in preparation of diphenylmethane diisocyanate through the non-phosgene way.

The invention discloses a seawater gas detection device and a detection method. The seawater gas detection device comprises a water sample collection unit, a gas-liquid separation unit and a gas detection unit; the water sample collection unit is used for introducing a water sample to be detected and pre-treating the water sample to be detected; the gas-liquid separation unit adopts the characteristic that the dissolving degree of the gas in the liquid is decreased along with the increasing of temperature and decreasing of pressure and separates the gas and liquid of the water sample to be detected in three levels by designing a water heater, a throttling device and a centrifugal gas-liquid separator, so that the gas-liquid separation degree is increased, the gas dissolved in the liquid water sample is more thoroughly separated, and the separation efficiency is higher; moreover, the water sample is high in flowing speed, and the precision of the gas detection unit for measuring the gas to be detected is greatly supported. In addition, a pressure-resisting shell is arranged outside the device, so that the device has the capacity for resisting the high pressure in deep sea and is convenient for executing the long-term, continuous and in-situ measurement task in a deep sea environment.

The invention discloses a top suction type range hood of novel oil screens. The top suction type range hood comprises a box body and a smoke collection panel, wherein a smoke collection opening is formed in the smoke collection panel; an upper oil screen and a lower oil screen are mounted on the smoke collection opening; the upper oil screen and the lower oil screen are convex cover bodies formed by stretching the smoke collection opening in a direction to the box body; a smoke collection concave cavity is formed in a convex cover body; the smoke collection panel is tilted, so that the convex cover bodies are obliquely mounted on the smoke collection opening; a hollow oil guide framework is mounted at the edge of the smoke collection opening; an oil guide groove matched with the edges of the oil screens is formed in the oil guide framework; the edges at lower positions of the convex cover bodies are connected to an oil receiving box; an oil guide tank is formed between two adjacent smoke suction holes; the smoke suction holes on the upper layer and the smoke suction holes on the lower layer are staggered at an upper part and a lower part, so that the smoke suction holes on the upper layer are in upper-and-lower correspondence to the oil guide tanks on the lower layer; the oil guide tanks on the upper layer are in upper-and-lower correspondence to the smoke suction holes on the lower layer. Through the oil screens of the structure, the smoke collection volume of the smoke collection groove is increased; the oil smoke storage performance of the oil screens can be improved.

The invention belongs to the technical field of material preparation and photocatalysis, and relates to a preparation method of an iron-based supramolecular graphite phase carbon nitride photocatalyst. The catalyst is prepared by pyrolyzing a precursor generated from melamine, cyanuric acid and ferric salt through a supramolecular self-assembly reaction. On one hand, the supermolecular graphite phase carbon nitride obtained by the self-assembly method is larger in specific surface area and more in catalytic active sites; and on the other hand, due to the action of hydrogen bonds, the iron-based supramolecular graphite phase carbon nitride is more stable in the preparation process, iron elements can be anchored and dispersed more efficiently, and the separation degree of photo-generated electron holes is improved. The iron-based supramolecular graphite phase carbon nitride has excellent photocatalytic activity, is simple to prepare and low in cost, and has huge environmental and economic benefits.