41results about How to "Achieve removal" patented technology

The invention discloses an agricultural non-point source pollution treatment system, and relates to the technical field of agricultural environmental protection and water treatment, and the agricultural non-point source pollution treatment system comprises an ecological ditch unit, an ecological pond unit, a connecting pipeline and a control unit; the ecological ditch unit is used for carrying out primary pretreatment on sewage through a plant enhanced corridor and an ecological filter dam to remove suspended solids and part of pollutants; the ecological reservoir pond unit realizes deep purification through a multi-stage process of flocculent precipitation, enhanced denitrification, ecological treatment and a stable area; the control unit intelligently regulates and controls water flow based on water quality monitoring data, water reaching the standard is directly reused in farmland or lakes, and water not reaching the standard enters a pond to be further treated. According to the invention, stepped deep removal of pollutants, cyclic utilization of water resources and self-adaptive operation of the system are realized, and the treatment efficiency and stability are improved.

This invention provides a highly efficient dehydration method for energetic and water-containing waste HTPB propellant, comprising: Step 1, barrier coupling sheet preparation: Under low temperature conditions of 5-10℃, the energetic and water-containing waste HTPB propellant is placed inside a barrier, protected by an inert gas, and pressed into propellant sheets with a thickness ≤1mm using a two-roller press; Step 2, fiber-like capillary adsorption: The propellant sheets obtained in Step 1 are spread flat on the surface of a multi-level porous fiber-like capillary matrix, and allowed to adsorb statically. Through capillary effect, free water on the surface of the propellant sheets is driven to migrate along the porous channels of the matrix and be captured, removing the surface free water; The fiber-like capillary matrix is ​​composed of a cellulose skeleton phase, a silica aerogel porous control phase, a hydroxylated nanocellulose interface functional phase, and a polyurethane substrate supporting and stabilizing phase; Step 3, negative pressure physical dehydration; Step 4, chemical selective dehydration; Step 5, safe recycling. This invention has high dehydration efficiency, retains thermal stability, is safe and controllable, and has low cost.

This utility model discloses an auxiliary tool for replacing walking boards, including a base, a mounting seat fixedly installed on the top of the base, a rotating seat rotatably connected inside the mounting seat, a connecting sleeve rotatably connected to the rotating seat via a slewing bearing, a drive arm disposed inside the connecting sleeve, a sliding part of the drive arm slidably connected to the inner wall of the connecting sleeve, a mounting arm fixedly connected to the bottom end of the drive arm, and a lifting fork fixedly installed at both ends of the bottom of the mounting arm. Using casters installed on the bottom of the base and the base plate, the device can be easily moved to the location of the walking board to be replaced, so that the lifting fork is positioned directly above the gap between the walking boards. The lifting fork is inserted into the gap between the walking boards by the drive arm. Since the connecting sleeve and the rotating seat are rotatably connected via the slewing bearing, the lifting fork is swung left and right by the drive arm to insert it deeper into the gap between the walking boards. The lifting fork is then rotated upwards by the drive arm to lift the walking board to be replaced, thus removing the installed walking board.

This invention belongs to the field of polyolefin preparation and relates to a method for preparing a polyolefin material with low metal impurities and resistance to precipitation. The method includes the following steps: (1) adding polyolefin resin raw material and fatty ketone solvent into the extraction vessel of a supercritical extraction device, introducing a gaseous medium into the extraction vessel, adjusting the temperature and pressure of the extraction vessel to make the gaseous medium be in a supercritical state, and treating the polyolefin resin raw material in a supercritical fluid; the fatty ketone solvent is C3-C 10 (1) At least one of the fatty ketone solvents; (2) Cooling and depressurizing to separate the polyolefin resin raw material from the solvent phase and drying it to obtain the polyolefin material with low metal impurities and resistance to precipitation. The method provided by the present invention has high efficiency in removing metal impurities from polyolefins and simultaneously achieves the removal and control of the content of soluble polymers, which significantly improves the purity and precipitation resistance of polyolefin resins.

This invention relates to a fractured solid-phase alkylation material, its preparation, and its application. Using epoxy-based microspheres as a carrier, polyethyleneimine, an acid-fractureable linker arm, and iodoacetic acid-N-succinamide ester are sequentially modified via covalent bonding to prepare the fractured solid-phase alkylation material. This material selectively reacts with thiol groups on proteins, enabling efficient enrichment and processing of proteins in complex biological samples such as cells, tissues, and body fluids. By cleaving the linker arm under acidic conditions, the protein and peptide fragments can be released without damage, potentially providing important technical support for deep proteomic coverage analysis and protein variant analysis.

This utility model provides a pen tip protective sleeve installation mechanism and installation line, relating to the field of pen tip protective sleeve installation technology. The pen tip protective sleeve installation mechanism includes a sleeve flow channel for orderly supply of protective sleeves to subsequent steps; an opening and closing control module to control whether to cut off the sleeve flow channel; a pick-and-place installation mechanism and a rotation drive mechanism: a sleeve installation fixture for accommodating the protective sleeve supplied by the sleeve flow channel, a rotation drive mechanism for driving the pick-and-place installation mechanism to rotate, and an installation power mechanism for installing the protective sleeve from the sleeve installation fixture onto the pen. This device can automatically pick up the protective sleeve and then install it onto the pen, thus replacing manual installation and offering advantages of higher efficiency and lower cost. The installation line in this solution can also automatically adjust the pen barrel feeding posture and remove defective products after protective sleeve installation, further improving the automation level and production efficiency of pen tip protective sleeve installation.

The utility model relates to the technical field of highway construction discloses a kind of existing guardrail post quick pulling tool, including hollow steel tube, the middle part of hollow steel tube is fixedly connected with steel sheet, the top of steel sheet is fixedly connected with U-shaped ring by bolt, the low end of steel sheet is provided with hole one, the periphery of hollow steel tube is all provided with hole two, hole one and hole two are perpendicular to a line, steel sheet opens two hole one (upper hole, lower hole), upper hole is used to wear U-shaped ring, lower hole is used to wear high-strength bolt (or round steel).In the utility model, hollow steel tube is placed in guardrail post, high-strength bolt (or round steel) first passes the bolt hole of existing guardrail post, and then passes the opening of hollow steel tube (and the lower hole of steel sheet), wire rope is hung excavator bucket tooth, lower U-shaped ring is passed, excavator upper arm is lifted, and the pulling of guardrail post is realized.

The utility model relates to the technical field of wastewater treatment, in particular to a low-carbon biological treatment system which comprises a pretreatment module, a decarbonization module and a biological denitrification module, the pretreatment module comprises an adjusting tank and a pretreatment section, the adjusting tank is used for homogenizing and homogenizing wastewater entering the adjusting tank, and the pretreatment section is used for removing toxic and harmful pollutants which cannot be biologically degraded; the decarburization module comprises an aeration tank and a sedimentation tank and is used for removing organic matters in the wastewater. An MABR reaction zone and an anaerobic ammonia oxidation reaction zone are integrated into an up-flow reactor, an MABR reaction layer and an anaerobic ammonia oxidation reaction layer are formed in the reactor, multifunctional pollutant removal can be achieved, meanwhile, a pipeline for sludge dredging and discharging is arranged, it is guaranteed that the two processes can complement each other, partition reaction can be achieved, and the effect that the two processes can be recycled is achieved. And the function is not influenced by integrated design.

The utility model relates to plush removal technical field, and disclose a kind of yarn's plush removal device for textile, including base, the top of base is fixedly connected with mounting bracket, the inside of base is installed with deplush component, the inside of mounting bracket is installed with bottom deplush component, the deplush component includes mounting plate, the top of mounting plate is installed with servo motor, the output of servo motor is fixedly connected with rotating rod, the surface of rotating rod is fixedly connected with connecting arm. The utility model is driven by servo motor and is set to bottom cleaning roller and slide rail one, slide block one linkage structure, realize the dynamic adjustment of yarn tension and down, when running, servo motor drives rotating rod and connecting arm rotation, by the sliding of connecting plate and slide block one along slide rail one, the height of bottom cleaning roller is adjusted, so that yarn is taut in winding process, while the small scraper on its surface and yarn friction, effectively remove fluff.

The utility model discloses a graphite plate deburring tool, related to stamping die technical field, including work table, work table includes lower die holder and sets up the upper die holder in the upper of lower die holder, and is provided with the installation site of installing graphite plate in lower die holder, and the upper die holder includes fixed plate, drive mechanism and stamping mechanism, and the stamping mechanism includes stamping base and punch, and the stamping base is connected with drive mechanism, and the punch is connected with the side of the stamping base to lower die holder, and the punch has the stamping inner ring assembly close to the center of punch, and the stamping outer ring assembly is set up in the outer periphery of stamping inner ring assembly, and the graphite plate is pressed down by drive mechanism drive stamping mechanism to graphite plate, so that the stamping outer ring assembly of punch can stamp the outer ring of graphite plate to remove the outer ring burr of graphite plate, and make the stamping inner ring assembly stamp the through -hole of graphite plate to remove the burr of through -hole.

The application discloses a chemical mechanical polishing liquid and a polishing method for soft magnetic alloy. The polishing liquid is composed of the following raw material components in percentage by weight: 1.3wt%-1.8wt% of a chelating agent, 10wt%-13wt% of abrasive, 7wt%-9wt% of a pH buffer, 3wt%-3.5wt% of a corrosion inhibitor, 11wt%-13wt% of an oxidizing agent and the balance of deionized water. The abrasive is acidic silica sol, the oxidizing agent is hydrogen peroxide, the corrosion inhibitor is at least one of glycine, polyaspartic acid, glutamic acid and chitosan, the pH of the polishing liquid is 3-5, and the pH buffer is a citric acid-sodium citrate buffer. The polishing method comprises the following steps: grinding the soft magnetic alloy; performing chemical mechanical polishing rough polishing on the ground soft magnetic alloy by using a rough polishing slurry; performing chemical mechanical polishing fine polishing on the rough polished soft magnetic alloy by using the polishing liquid, so that the soft magnetic alloy with a smooth and flat surface is obtained. The polishing liquid is green, environment-friendly and pollution-free, and the surface of the soft magnetic alloy after polishing is smooth and flat.

The application provides a method for extracting metal in transformer oil by using ionic liquid and recycling the ionic liquid. Some functional groups in the ionic liquid, including halogen, hydroxyl, sulfide, urea and thiourea, can form complexes with metal ions in the transformer oil. Thus, the metal ions are extracted from the transformer oil into the ionic liquid, and the metal impurities in the transformer oil are removed. The ionic liquid is used to extract the metal in the transformer oil, so that the metal substances in the oil are reduced, and the insulation performance of the transformer oil is improved. After the metal impurities in the oil are removed, the long-term and safe operation of the transformer is ensured. After the used ionic liquid is treated by the steps of rough filtration, cation exchange resin treatment, reduced pressure distillation and evaporation crystallization, the ionic liquid can be recycled. Compared with other methods, the recovery conditions of the above steps are economical and efficient, and organic reagents are not needed, so that the application of the ionic liquid in the power system is provided.

The present application belongs to the technical field of mineral processing and environmental protection, and particularly relates to a method for removing impurity metal ions and compounds in raffinate acid. The impurity metal ions and compounds such as iron, magnesium and aluminum in the raffinate acid are selectively removed under the synergistic action of adsorption materials and flotation reagents. The method mainly uses the strong adsorption of the adsorption materials and the strong selectivity of the specific flotation reagents, and uses the adsorption materials and the flotation reagents in combination, and through adjusting and controlling the types, the ratio, the dosage of the adsorption materials and the flotation reagents, and the reaction sequence, the time and the temperature, the selective removal of the impurity metal ions and compounds in the raffinate acid is realized, and the comprehensive utilization rate of the raffinate acid is improved. The method is suitable for the purification system of the raffinate acid in the phosphorus chemical industry, and has the advantages of simple method, strong selectivity, remarkable effect and short action time, and has important significance for solving the problems of difficult disposal and reuse of the raffinate acid, high production cost of the phosphorus chemical industry and serious waste of phosphorus resources.

This invention relates to a method for separating magnesium and lithium in salt lake brine and its application, relating to the field of efficient and clean utilization of salt lake resources and modern salt chemical technology. This separation method constructs a precise selective magnesium precipitation window, allowing magnesium to precipitate deeply in the form of carbonates, while lithium remains largely in solution, thereby achieving the separation and removal of magnesium from high-magnesium brine. The magnesium precipitate obtained through online solid-liquid separation has a consistently low Mg / Li mass ratio below 1.0 × 10⁻⁶. ‑2 Subsequently, the filtrate is efficiently crystallized and recovered from lithium carbonate via co-ion effect or concentrated pyrolysis at higher temperatures (T2 = 85–100 °C) and lower pCO2. This invention achieves a highly efficient closed-loop cycle of NH3 and CO2, and has the advantages of strong universality, high selectivity, low cost, and environmental friendliness.

The application discloses a flue gas water-saving and multi-pollutant removal device and a working method thereof, and belongs to the technical field of flue gas water-saving. The device comprises a flue gas inlet pipe, a cylinder and a dehydrated flue gas passage which are sequentially connected. The outer wall of the cylinder is provided with a reinforced radiation cooling coating. A plurality of rows of high-voltage electrode columns and ground electrode columns are alternately arranged in the front section of the flue gas inlet pipe. The dehydrated flue gas passage is externally nested with a condensed water collecting device, and the condensed water collecting device is connected with the cylinder. A plurality of condensed water collecting openings are arranged in the outlet transition section, and the condensed water collecting openings are communicated with the condensed water collecting device. A vibrating string grid is arranged in the dehydrated flue gas passage, and a plurality of drainage holes are arranged on the dehydrated flue gas passage below the vibrating string grid. The device has the advantages of compact structure, small volume and low energy consumption, and can realize low-temperature and high-efficiency recovery of water in flue gas and simultaneous removal of multi-pollutants.

The utility model relates to agricultural technology field especially a kind of seed screening device, including spiral screening cylinder and feed hopper, spiral screening cylinder includes fixed rod and spiral channel, fixed rod is fixed and is arranged in spiral channel, the side of spiral channel close to fixed rod is first screening path, the other side is second screening path, and a plurality of spiral screening pieces are provided in first screening path;The bottom of spiral channel is provided with first discharge channel and second discharge channel, first discharge channel is connected with first screening path, and second discharge channel is connected with second screening path;Feed hopper is set in the top of spiral screening cylinder, and the side surface of feed hopper close to its narrow end is provided with feed inlet, so that seed can enter into first screening path by feed inlet.The utility model relates to a kind of seed screening device, can effectively remove the oilseed rape seed in Chinese milk vetch seed, ensure the purity of seed.

This invention discloses a system and method for removing oil from battery recycling product solutions. The system includes a primary oil removal module, an oil-water separation module, a deep oil removal module, and a solid-liquid separation module. The primary oil removal module promotes the self-coupling of suspended and dispersed oil in the lithium battery recycling product solution to form oil flocs. The oil-water separation module separates the oil and water layers according to different outlet heights to obtain a product solution free of suspended and dispersed oil. The deep oil removal module weakens the binding between dissolved oil molecules and water molecules in the product solution after the removal of suspended and dispersed oil, and polymerizes the dissolved oil molecules to form oil-containing solid floc precipitates, removing dissolved oil and emulsified oil from the water. The solid-liquid separation module retains the oil-containing solid floc precipitates to obtain a product solution with low oil content. This invention significantly reduces the cost of oil removal from battery recycling product solutions, improves oil removal capacity, and solves the problem that traditional processes cannot effectively remove dissolved oil.

This invention discloses a combined electro-discharge machining (EDM) method for long, narrow slit structures, specifically relating to the field of EDM technology. The steps are as follows: The workpiece is mounted on the EDM electrode wire; the EDM electrode wire moves in the XY plane; the machined workpiece is then aligned with the electrolytic machining wire electrode; the power supply and electrolytic control system are turned on for secondary machining; the electrolytic machining wire electrode moves along a predetermined trajectory in the XY plane; after secondary machining, the power supply is disconnected, the electrolyte circulation system is shut off, the electrolytic machining wire electrode and workpiece are removed, and both are cleaned, thus completing the machining process. This invention solves the problem of existing machining methods struggling to achieve high-quality machining of ultra-thin sheet-like long, narrow slit structures, improving the machining quality and efficiency of such structures.

The utility model relates to empty bottle disinfection device technical field discloses blowing and blowing rotary equipment empty bottle pre -disinfection gas washing device, including work table and fixedly connected in the processing chamber of work table top, work table is provided with transmission mechanism, and transmission mechanism plays the effect of empty bottle transportation, and transmission mechanism includes the motor fixedly connected in the inside of work table, and the output fixedly connected with transmission screw rod of motor, the top of work table still has the sliding connection with sliding platform, and the top of sliding platform is opened and has placed the groove, and the top fixedly connected with connecting frame of processing chamber, the utility model discloses through the setting of knob, clamping piece, sliding platform and injection pipe, has realized the effect of being able to to bottle body carries out the clamping effect, has improved the gas washing effect of bottle body, has solved the single structure of most empty bottle disinfection device of prior art, is not convenient to the function of clamping different specifications bottle body in the process of using, leads to the situation that may appear in the process of disinfection, greatly influence work efficiency's problem.

This invention discloses a phosphorus trichloride production tail gas absorption and treatment device with safety monitoring function, including an absorption tower, a liquid distributor and an inlet pipe disposed on the absorption tower, an outlet pipe at the top of the absorption tower, and a drain pipe at the bottom of the absorption tower. It also includes an adaptive flow stabilizer and a gravity feedback anti-clogging packing assembly disposed within the absorption tower. The liquid distributor is located above the gravity feedback anti-clogging packing assembly, and the adaptive flow stabilizer is located below the gravity feedback anti-clogging packing assembly. This invention relates to the technical field of phosphorus trichloride production tail gas treatment equipment, specifically providing a phosphorus trichloride production tail gas absorption and treatment device with integrated adaptive flow stabilization, real-time monitoring of packing blockage, and gravity feedback anti-clogging, and equipped with safety monitoring function.

The application provides a kind of alkali reinforced copper-based material excitation peroxymonosulfate water treatment method and device, it is related to wastewater treatment technical field, the method includes: adding alkali agent, copper-based material, peroxymonosulfate into water to be treated;The alkali agent is sodium hydroxide and / or potassium hydroxide;The copper-based material is copper oxide and / or copper sulfide.The application has the advantages of excellent pollutant treatment effect, mild reaction condition, simple process flow, green environmental protection, energy saving, easy recovery and recycling, etc., realizes the purpose of small dosage of oxidizing agent and catalyst, high utilization rate of oxidizing agent, small amount of metal ion dissolution and pH of effluent reaching standard.

The application belongs to the technical field of functional materials and food safety, and particularly relates to a nano iron / titanium dioxide / cyclodextrin metal organic framework composite as well as a preparation method and application thereof. The gamma-cyclodextrin and alkali liquor are mixed in water to obtain a crystallization mother liquor of the cyclodextrin metal organic framework; then the nano ferroferric oxide and nano titanium dioxide are added into the crystallization mother liquor of the cyclodextrin metal organic framework, and ultrasonic mixing is performed to obtain a nano iron / titanium dioxide / cyclodextrin / potassium hydroxide composite solution; and then filtering and growth culturing are sequentially performed to obtain the nano iron / titanium dioxide / cyclodextrin metal organic framework composite. The nano iron / titanium dioxide / cyclodextrin metal organic framework composite exhibits significantly enhanced crystal growth kinetics characteristics, exhibits excellent renewable performance, and can be recycled through simple centrifugal separation, thereby overcoming the technical defects of the cyclodextrin metal organic framework material in the prior art.

The application belongs to the technical field of two-dimensional material processing and preparation, and particularly relates to a two-dimensional material transfer device and a two-dimensional material transfer method. The two-dimensional material transfer device of the application comprises a two-dimensional material attaching module, the two-dimensional material attaching module comprises a first positioning unit for placing a growth substrate and a second positioning unit for fixing a target substrate, a two-dimensional material transfer module is arranged adjacent to the two-dimensional material attaching module, the two-dimensional material transfer module has a solution pool for storing a dissolving solution, the second positioning unit is movable to a first station to attach the growth substrate to the target substrate, and the second positioning unit is further movable to a second station to immerse the growth substrate in the solution pool. The device can realize the combination of the growth substrate and the target substrate and the removal of the growth substrate on the same device, and can automatically complete most steps of two-dimensional material transfer, thereby greatly improving the transfer efficiency. Meanwhile, large-area transfer of two-dimensional material can be realized.

The application relates to the field of electronic component manufacturing, and particularly discloses an AIOT module plate semi-hole burr intelligent removal method based on laser ablation, aiming to solve the problems of low efficiency, easy damage to the substrate, uneven removal, lack of intelligent identification and accurate adaptation, low control precision and real-time feedback mechanism and the like of the existing AIOT module plate semi-hole burr removal method. The method intelligently identifies, accurately positions and three-dimensionally quantizes micron-level burrs through high-precision visual detection technology combined with deep learning; utilizes an artificial intelligence algorithm to intelligently generate customized laser ablation parameters according to burr characteristics and material physical properties; and performs non-contact removal through a precise laser ablation system in cooperation with an optimized scanning path. The application can realize non-contact, high-efficiency, high-precision and lossless intelligent removal of burrs by adopting the above technical solution, and greatly improves the product yield, electrical performance and manufacturing level.

The utility model relates to the technical field of paint delivery, disclose a paint delivery pipeline subassembly of zinc -aluminium coating production line, including feed pipe, the one end of feed pipe is provided with filter equipment, the filter equipment is used for filtering paint, the other end of filter equipment is provided with agitating unit, the agitating unit is used for making paint even, the filter equipment includes V -shaped tube, one end of V -shaped tube is linked with the one end of feed pipe, the bottom of V -shaped tube is provided with waste component, the inner wall of V -shaped tube is fixedly connected with fixed ring, the inner wall of fixed ring is rotatably connected with rotating component, one side of rotating component is provided with fixed component, in the utility model, filter the paint through the filter screen, intercept large particle, the filter screen rotates in the inner wall of fixed ring, the efficient use of filter screen, the filter screen is backflushed by nozzle, and the large particle blockage that falls along V -shaped tube to the lowest end and is discharged.

This invention belongs to the field of construction safety management technology, specifically a video surveillance device for construction safety control. It includes a base, a support column fixedly mounted on the top of the base, a lifting column connected to the top of the support column, a drive plate connected to the upper side of one side wall of the lifting column, a drive block connected to the bottom of the drive plate, and a camera connected to the tail end of the drive block. A fixed shell is connected to one side wall of the lifting column, and a recessed portion is formed on the top of the fixed shell. Sponge strips are installed on both sides of the inner cavity of the recessed portion. This invention uses the drive plate to move the camera back, thereby moving the camera to the upper side of the fixed shell. Then, the fixed shell is moved upwards, placing the camera inside the cavity of the fixed shell. The camera then rotates, allowing the sponge strips to clean its surface, removing impurities and ensuring the cleanliness of the camera surface, thus guaranteeing the image capture effect.

This invention belongs to the field of C5 fraction separation technology, and discloses a C5 fraction refining system and a method for refining pentane foaming agent using it. The C5 fraction refining system includes: a heavy-reduction thickening tower, a refining tower, a condensate tank, an azeotropic agent injection line, and a finished product collection pipeline. The C5 fraction refining system provided by this invention can remove most of the target impurities in the heavy-reduction thickening tower, effectively reducing the number of trays in the refining tower, lowering equipment investment costs, simplifying the structure, reducing the likelihood of internal blockage, and extending the equipment's operating cycle. The pentane foaming agent refining method provided by this invention can effectively improve the quality of the pentane foaming agent, increasing pentane purity from approximately 50% to over 70%, completely removing DMF, and reducing the content of chlorine elements such as ammonium chloride to less than 10 ppm, as low as below 5 ppm.

This invention discloses a method for removing ammonia from crude fuel gas using dielectric barrier discharge plasma. The method includes the following steps: NO is added to NH3-containing crude fuel gas obtained from biomass gasification after dust removal. After thorough mixing in a gas mixer, the mixture enters a plasma reactor. In the plasma reactor at 200℃–450℃, NO and the NH3-containing crude fuel gas react under plasma activation, converting NH3 and NO into N2, H2O, and H2, thereby removing ammonia from the crude fuel gas. Furthermore, the added NO is consumed during NH3 removal, avoiding additional pollutants. Moreover, this method does not introduce a catalyst, reducing costs and avoiding low reaction stability caused by catalyst deactivation, enabling long-term stable operation of the equipment.

The invention belongs to the field of polyolefin preparation, and relates to a preparation method of a polyolefin material with low dissolved matter and low ash content. The method comprises the following steps: (1) adding a polyolefin resin raw material and a fatty ester solvent into an extraction kettle of a supercritical extraction device, introducing a gas medium into the extraction kettle, adjusting the temperature and pressure of the extraction kettle to enable the gas medium to be in a supercritical state, and treating the polyolefin resin raw material in supercritical fluid; the fatty ester solvent is at least one of fatty ester solvents of C2-C10; and (2) cooling and decompressing to separate the polyolefin resin raw material from the solvent, and drying to obtain the polyolefin material with low dissolved matter and low ash content. The method provided by the invention avoids the problems of complex solvent recovery and high difficulty in removal of the high-boiling-point chelating agent in the traditional deliming process, and the used fatty ester solvent can be easily removed without causing pollution to the polyolefin resin.

This utility model relates to the field of royal jelly acid separation and purification technology, and in particular to a multi-stage separation and purification device specifically for royal jelly acid. Its technical solution includes: a pretreatment unit, a multi-stage extraction unit, a distillation unit, a crystallization unit, and a collection tank. The pretreatment unit includes a mixing tank, and a motor is mounted on the top surface of the mixing tank. This utility model, by setting up a pretreatment unit, can perform preliminary treatment on the raw materials, remove solid impurities, reduce the risk of equipment blockage during subsequent separation processes, ensure stable equipment operation, and also improve separation efficiency. Through the coordinated work of the pretreatment unit, multi-stage extraction unit, distillation unit, and crystallization unit, multi-stage separation and purification of royal jelly acid is achieved, significantly improving separation efficiency and product purity. Compared with traditional single separation methods, this utility model can more effectively remove impurities and isomers, improve the purity of royal jelly acid, and meet the industrial production demand for high-purity royal jelly acid.