51results about How to "Reach recovery" patented technology

The invention relates to an aerial work platform. The aerial work platform comprises a platform chassis, a walking device, a lifting device, a work platform and a control unit. The work platform comprises a fixed platform and a movable platform, the movable platform can horizontally move in a telescopic mode towards at least one direction on the fixed platform, and the fixed platform is connected to the top of the lifting device. The aerial work platform is characterized in that the platform chassis is connected with at least one telescopic ground supporting foot supported on the ground, and the telescopic direction of the ground supporting foot is the same as that of the movable platform. The aerial work platform is simple in structure, has the functions of planar moving, longitudinal lifting and transverse telescoping, enables a scissor-type lifting platform to move flexibly, and facilitates timely work. Through change of the position of the supporting foot, the safety work area of the work platform is obviously increased, and the accidents of side turning and the like due to the fact that the side surface bears much are effectively prevented.

The invention belongs to the field of environmentally-friendly purification, and relates to a method for removing acidic gases through a biological technology. The method is mainly used to remove acidic gas flow containing carbon dioxide, hydrogen sulfide, carbonyl sulfide, carbon disulfide and mercaptan. A chemical absorption, microbial oxidation regeneration and biotrickling filter three-tower technology is adopted, and the chemical absorption characterized in that an alkaline solution is used to absorb carbon dioxide, hydrogen sulfide and a small amount of organic sulfur which are introduced to the alkaline solution; the microbial oxidation regeneration realizes biological oxidation of sulfides into biological sulfur under aeration conditions and alkaline solution regeneration; and biotrickling filter purification of organic sulfur is used for removing carbonyl sulfide, carbon disulfide, mercaptan and other organic sulfurs. The method adopting carbon dioxide fixation, sulfur resource recovery, absorption liquid recycling and organic sulfur deodorizing purification realizes acidic gas integral treatment, and solves the environmental protection problem of acidic gas pollution.

The invention relates to a preparation method of a heavy metal ion imprinting polymer porous small ball and a film based on sulphonic acid resin. The molecular imprinting polymer small ball and film are prepared from a casting solution by a phase inversion method, wherein the casting solution comprises a linear polymer, the sulphonic acid resin, template heavy metal ions, a pore-forming agent and a solvent. The casting solution dropwise or linearly enters a coagulating bath by oscillation of a pinhead, and forms the polymer small ball or film after coagulating and shaping. The size dimension of the ion imprinting polymer porous small ball can be controlled by controlling the extrusion pressure and oscillation frequency. The ion imprinting polymer porous small ball or film has the porous characteristic, simultaneously forms metal ion imprinting sites in the polymer and on the surface of the polymer, can be used for removing heavy metal ions or enriching and recovering noble metal in water, and can be regenerated and cyclically used after acid washing.

The invention discloses an object digitized three-dimensional reconstruction system based on raster scanning. The object digitized three-dimensional reconstruction system based on the raster scanning comprises a management unit, a data collection unit, a data processing unit and a three-dimensional reconstruction unit. The management unit controls the work of the data collection unit, the data processing unit and the three-dimensional reconstruction unit. The data collection unit is used for collecting all-around image information of an object and transmitting the collected image information to the data processing unit. The data processing unit receives the image information and carries out denoising and compensation processing on the image information. The processed image information is further transmitted to the three-dimensional reconstruction unit. The three-dimensional reconstruction unit carries out position and direction calibration on the processed image information, the three-dimensional geometric structure of the object to be reconstructed is calculated by utilizing grating coding, and color texturing and material recover are carried out. Fine reconstruction of the object is carried out by utilizing the raster scanning equipment and software, and perfect revivification of the object on fineness, color and material aspects is achieved.

The invention relates to a method for extracting and enriching rare and precious metals from a spent catalyst, and belongs to the technical field of secondary resources recovery and reuse technology of the rare and precious metals. The method comprises the steps of firstly carrying out low-temperature reduction on the spent catalyst to be treated, a reducing agent and iron oxide or copper oxide, and adding a silicon material and an additive for high-temperature melting so as to collect the rare and precious metals after low-temperature reduction; or directly high-temperature melting the spentcatalyst to be treated, the silicon material, the additive and the iron oxide or the copper oxide so as to collect the rare and precious metals; finally obtaining a silicon-based alloy and a waste residue through residue-gold separation; enriching and separating the obtained silicon-based alloy so as to obtain a rare and precious metal enriched product and high-purity silicon; or solidifying, grinding and hydrometallurgically leaching the obtained silicon-based alloy so as to obtain a leaching agent containing the rare and precious metals and the high-purity silicon; and recycling the obtainedhigh-purity silicon used as a silicon material again, or sending to the photovoltaic or electronic product enterprise so as to be used as a raw material for preparing solar grade silicon or electronic grade silicon. The method for extracting and enriching the rare and precious metals from the spent catalyst provided by the invention has the advantages of low cost and short flow.

The invention discloses a treatment process for oil-contained sludge generated by oilfield wastewater treatment. The treatment process comprises the following steps: subjecting the oil-contained sludge to acidification deoiling treatment so as to obtain oil-reduced sludge; and subjecting the oil-reduced sludge to oxidation degradation treatment so as to obtain quantity-reduced oily sludge. The treatment process provided by the invention adjusts the oil-contained sludge in a range of neutral to weak acidity by utilizing acid, so a part of acid soluble inorganic matters in the oil-contained sludge is dissolved and corroded, and more importantly, crude oil adsorbed on clay can be desorbed and separated; thus, the purposes of recovering oil resources and improving oily sludge density can be easily achieved. Meanwhile, the treatment process provided by the invention can relieve cross-linking and adsorption states of high-molecular polymers, promotes oxidation degradation of polymers, facilitates to increasing migration space of free-state water molecules in the oily sludge, is favorable for solid-liquid separation of the oily sludge, and reduces energy consumption of centrifugal dehydration, thereby improving settleability of a solid phase in the oil-contained sludge and facilitating to realizing quantity reduction and even harmless discharge of sludge.

The invention discloses a method for smelting ferro-molybdenum from ammonia leaching residue to recover molybdenum. The method comprises the following steps: 1, the ammonia leaching residue and an auxiliary material are added into a mixer to be mixed uniformly to obtain a mixture, wherein the auxiliary material comprises ferro-silicon, ferro-phosphorus, aluminum particles, sodium nitrate and a fluxing agent, and the fluxing agent adopts calcium oxide or fluorite; 2, the mixture is loaded in a smelting furnace, the surface of the mixture is covered with a layer of firelighter, and a reaction product is obtained after ignition for smelting; the reaction product stands still so that iron is precipitated to form smelting residue and a ferro-molybdenum ingot, the smelting residue is removed, the ferro-molybdenum ingot cools naturally to be solidified, and the purpose of smelting ferro-molybdenum from the ammonia leaching residue to recover molybdenum is achieved. According to the method provided by the invention, the ammonia leaching residue is mixed with the smelting auxiliary material on the basis of a silicon-aluminium thermal reduction method, and the smelting residue and the ferro-molybdenum ingot are produced by a ferro-alloy self-heating reaction technique, so that the effect of recycling molybdenum metal is achieved; when used for smelting ferro-molybdenum to recover molybdenum in ammonia leaching residue, the method has the advantages of high resource utilization rate, low smelting auxiliary material consumption, small environmental pollution and high metal recovery rate.

The invention provides a method for recovering vanadium contained slurry produced in the refining process of titanium tetrachloride and equipment thereof, wherein the method comprises: treating the vanadium contained slurry, converting the vanadium oxytrichloride in the vanadium contained slurry into vanadyl dichloride, and spraying the vanadium contained slurry to a chlorination system under the condition of controlling the temperature of the spraying point between 150 and 190 DEG C. The applied equipment comprises a chlorination furnace (1), a primary gravity dust precipitator (2) and a secondary gravity dust precipitator (3); the top of the secondary gravity dust precipitator (3) is provided with a vanadium contained slurry storage groove (4) which is connected with a single-screw pump (5), the single-screw pump (5) is connected with an atomizing device (6) and the atomizing device (6) is positioned inside the secondary gravity dust precipitator (3). Compared with the prior art, the method can effectively separate and recover the titanium tetrachloride in the vanadium contained slurry, thus reducing pollution, simplifying production process and saving production cost.

The invention provides a method for treating stainless steel pickling waste liquid, comprising the following steps: (1), oxidizing ferrous ions: introducing an oxidant or hot air into stainless steel pickling waste liquid to oxidize most ferrous ions in the stainless steel pickling waste liquid into trivalent iron ions; (2) settling the trivalent iron ions by iron ore process: precipitating by iron ore process so that the trivalent iron ions obtained in step (1) generate iron precipitate mainly in the form of Fe2O3 H2O; (3), precipitating trivalent chromium ions and nickel ions: filtering the iron sediment obtained in step (2), adding a base to filtrate to adjust pH so that the trivalent chromium ions and the nickel ions co-precipitate, or to adjust pH so that the trivalent chromium ions precipitate first, filtering chromium precipitate, and adjusting pH to precipitate the nickel ions.The method provided herein enables iron resources and chromium-nickel resources to be recycled and solid hazardous waste to be avoided.

The present invention discloses a laundry sewage recovery and reutilization process. It is characterized by that said process adopts inorganic ceramic membrane separation technique and dynamic cross-flowing filtration mode to implement heat energy recovery, sewage recovery and detergent recovery so as to make the laundry sewage be changed into useful resource.

The invention discloses a carbon nanotube modified thermoplastic elastomer composite material with a solvent resistance and a preparing method thereof. A modified thermoplastic elastomer and carbon nanotubes are dissolved in an organic solvent, heated, stirred uniformly and molded at high temperature to obtain the carbon nanotube modified thermoplastic elastomer composite material with the solvent resistance. According to percent by weight, the carbon nanotube modified thermoplastic elastomer composite material with the solvent resistance is prepared from 90-99% of modified thermoplastic elastomer and 1-10% of carbon nanotubes. The carbon nanotube modified thermoplastic elastomer composite material with the solvent resistance has excellent mechanical properties and solvent resistance, is of a crosslink structure and cannot be dissolved at normal temperature and keeps a remolding characteristic at high temperature. The carbon nanotubes can be recycled separately as per required, and the solution of the dissolved composite material is centrifuged and heated to obtain the modified thermoplastic elastomer and the carbon nanotubes respectively.

A sea-island fiber with water soluble polyurethane elastomer as sea and reducing method for same in a warm condition are provided. Sea-island fibers are made from water soluble polyurethane elastomer and island component fusion composite spinning filaments at a certain condition; and water solubility of polyester containing potential hydrophilic groups are utilized to reduce and recover sea components in the warm condition. The sea-island fiber can be widely applied to industries of synthetic leather and textile; compared with the prior art, by the use of the sea-island fiber, and the reducing method, environment pollution and resource waste due to organic emission during sea-island fiber reduction process can be overcome.

The invention discloses an IGCC thermoelectric system and method capable of achieving flue gas waste heat deep utilization and input gas cooling. The IGCC thermoelectric system capable of achieving flue gas waste heat deep utilization and input gas cooling comprises a coal gasification and purification part and a gas-steam combined cycle power generation part. The gas-vapor combined cycle power generation part comprises a waste heat boiler, a steam turbine, a condensation heat exchanger and a gas type absorption heat pump. A saturated steam inlet and a flue gas outlet are arranged on the waste heat boiler. A high-pressure steam outlet of the waste heat boiler is connected with the steam turbine. The steam turbine is connected with a second generator to be used for power generator. Flue gas of the waste heat boiler is discharged into the condensation heat exchanger. An outlet of the condensation heat exchanger is connected with an inlet of the gas type absorption heat pump. A medium water outlet of the gas type absorption heat pump is connected with a medium water outlet of the condensation heat exchanger. According to the IGCC thermoelectric system and method, the energy utilization efficiency can be effectively improved, the heat supply capacity and the power generation capacity of a unit can be improved, and obvious economic benefits and environment protection benefits are achieved.

The invention relates to a blowing structure for an unloading device of a vertical centrifuge, and the blowing structure comprises a vertical scraper shaft and a scraper assembly connected to the lower end of the vertical scraper shaft, wherein the scraper assembly comprises a scrapping plate; a first air channel is arranged in the vertical scraper shaft; the scraper assembly is provided with a second air channel; the lower side of the first air channel is in sealing communication with the air inlet of the second air channel; and the air outlet of the second air channel is close to the working end of the scrapping plate. The first and second air channels which are in sealing communication are arranged and the air outlet of the second air channel is close to the working end of the scrapping plate, so when the unloading device is used for unloading the materials attached on a filter screen, the scrapping plate slowly cuts the materials from up to down along the rotation direction of a rotary drum, and meanwhile, the compressed air blows the material residues reserved on the filter screen through the air outlet of the second air channel, and the then material residues can vibrate under the action of the blown air and completely drop off from the filter screen, thereby achieving the purposes of recovering the materials and dredging the filter screen. The blowing structure has the advantages of removing the material residues reserved on the filter screen and dredging the filter screen.

The invention discloses a medical swing-type hospital bed, and belongs to the field of medical apparatus. The medical swing-type hospital bed includes a first bedstead, a swing mechanism, a control mechanism, adjusting mechanisms, massage mechanisms and a second bedstead; a connection frame is fixed between the first bedstead and the second bedstead; the adjusting mechanisms are transversely connected at the positions, between the first bedstead and the second bedstead, above the connection frame; the swing mechanism is transversely connected with the upper portions, between the first bedsteadand the second bedstead, of the adjusting mechanisms; the massage mechanisms are evenly connected with the tops of the portions, at the two sides of the adjusting mechanisms, of the connection frame.According to the medical swing-type hospital bed, by mounting the first bedstead, the swing mechanism, the control mechanism, the adjusting mechanisms, the massage mechanisms and the second bedstead,it is convenient to shift gear holders inside the adjusting mechanisms to make the adjusting mechanisms connected with the swing mechanism, the first rotation shafts inside the adjusting mechanisms are controlled by the control mechanism to rotate, then, a bed board inside the swing mechanism is driven to swing to conduct stretching training on the limbs of a patient, muscle atrophy and muscle necrosis of the patient are avoided, and therefore the purpose of assisting the patient in recovery is achieved.

The invention relates to a purification method of a long-chain dicarboxylic acid, which comprises I, heating a terminated fermenting liquid for demulsification, filtering to obtain a fermenting clearliquid; II, stirring while adjusting pH of the fermenting clear liquid to acid level, adjusting pH to basic level, adding little surfactant, stirring for a while, and filtering to remove solid matters; III, adding activated carbon, stirring, decoloring, and filtering; IV, heating the clear liquid of step III for acidifying, cooling, filtering, and drying to obtain the finished long-chain dicarboxylic acid. Synergy of an acid, a base and a surfactant herein helps effectively reduce the nitrogen content in the bio-process long-chain dicarboxylic acid, so that a high-quality dicarboxylic acid isattained.

The invention discloses a method for purifying dye wastewater containing high-concentration cyanide. According to the specific pollutants of dye wastewater containing high-concentration cyanide in theprinting and dyeing industry, i.e., cyanide and the like, an appropriate process route is chosen, a technical route of acidification, stripping and ozone oxidation is adopted, and thereby the objective of removing and recovering cyanide is achieved. As a cyanide purification technique, the method reduces the concentration of cyanide, so that highly poisonous dye wastewater becomes slightly poisonous, and thereby a foundation is laid for the subsequent biological treatment process. The method has the advantages of simple process flow, safe process operation, stable treatment effect, high pollutant removal rate, no secondary pollution and low operation cost. The invention solves the major environmental issue for the printing and dyeing industry, and also solves the problem of safety in theprocess of wastewater treatment, and environmental benefit, economic benefit and social benefit are remarkable.

The invention belongs to the technical field of hardware processing, particularly relates to a dust removing device for hardware processing, and aims to solve technical problems in the prior art. In order to solve the above technical problems, the dust removing device which is capable of recovering metal dust, convenient to move, and applicable to hardware processing is provided. The dust removingdevice for hardware processing comprises a tank body, universal wheels, footbrakes, a window frame, hinges, a glass window, a speed reducing motor, a concave frame, a T-shaped clamping plate, a straight clamping plate, a T-shaped screw rod, a first bracket and the like, wherein the footbrakes are mounted to the universal wheels; the speed reducing motor is fixedly connected to the top middle of the tank body; the concave frame is in transmission connection with the output end of the speed reducing motor; the T-shaped clamping plate is fixedly connected to the inner top of the concave frame; afirst threaded hole is formed in the bottom of the concave frame; and the T-shaped screw rod is in threaded connection with the first threaded hole. The dust removing device provided by the inventionachieves the effects that the metal dust can be recovered and the moving convenience can be achieved.

The invention discloses a method for recovering and preserving a wild small population of neolitsea sericea serving as a rare plant. The method comprises the steps: selecting a neolitsea sericea community remained on a coastal mountainous region in the east of Zhejiang to survey each wood on a typical sample plot; calculating importance values and age structures of species by using a statistical sampling method and a population statistical method; creating an optimal adaptable rehabilitation environment according to the dynamic adaption characteristic of the neolitsea sericea on different landsite types and at community development stages for the environment; optimizing the age structure, space distribution, species composition and land site condition of a popularization by using technical means such as mature tree rejuvenation, young seedling transplanting and updating, interfering wood thinning for tending and forest stand management so as to remarkably promote the survival and growth of small population of the neolitsea sericea, restore the structure of the small population to the maximum extent on the premise of finitely protecting plants and meet a production demand. By usingthe method, the growth vitality and stability of the small population of the rare plant are improved; and the method has a wide application prospect in preservation and ecological rehabilitation of the small population of the rare plant.

The invention discloses an ecological blanket structure for ecological slope protection and a constructing method thereof. The ecological blanket structure comprises a protection layer, a moistube layer, a heat preservation and water control layer, an ecological layer and an outer protection layer which form a square ecological blanket of a five-layer structure from bottom to top. The external frame structure of the ecological blank is formed by hooked bars on the left side and the right side, steel wire gauze on the front side and the rear side, steel wire gauze on the bottommost layer and steel wire gauze on the topmost layer; and as the steel wire gauze has strength and rigidity, the ecological blanket can be conveniently anchored on a slope and can also be prevented from whole slippingwhen anchored on a slope at the angle of 60 degrees or above. By providing corresponding required water for plants through moistubes and keeping the water through water-absorbing cotton, the water self-control capacity of the structure is realized, maintaining cost is reduced, and resources are saved. The ecological blanket structure is lower in manufacturing cost, huge in market potential and higher in green coverage and can better embody the ecological principle.

The invention relates to an environment-friendly synthetic method of 3,4-dimethylbenzaldehyde. The method comprises the following steps shown in the description: o-xylene is added to a high-pressure reactor, nitrogen is introduced for replacement, stirring is started, anhydrous aluminium trichloride is added, the mixture is cooled, boron trichloride is introduced slowly, temperature is controlled,CO is introduced to certain pressure, after pressure drops, CO is introduced continuously to keep pressure in the reactor until the pressure no longer drops which indicates reaction ending, an obtained material is transferred to a flash evaporator, temperature of the flash evaporator is controlled, and boron trichloride is recovered by two-stage condensing and can be applied to a reaction; a material obtained after flash evaporation is transferred into a flask containing ice water, stirred and left to stand for layering, an aqueous layer is extracted with o-xylene, organic layers are combinedand subjected to reduced-pressure fractional distillation, o-xylene is recovered and can be applied to the reaction, and high-purity 3,4-dimethylbenzaldehyde is obtained. The method is simple to operate, yield of synthesized 3,4-dimethylbenzaldehyde is high, cost is low, a little anhydrous aluminium trichloride is used, boron trichloride is recyclable, few three wastes are produced, and little environmental pollution is produced.

The invention discloses a drain energy utilization system of a steam header continuous blowdown flash tank, which comprises a continuous blowdown flash tank and a periodical blowdown flash tank, wherein the continuous blowdown flash tank is connected with the periodical blowdown flash tank through a continuous blowdown flash tank drain pipeline; a drain energy utilization device connected in parallel with the periodical blowdown flash tank is arranged on the continuous blowdown flash tank drain pipeline, and comprises a steam generator, a dust catcher ash bucket heater, a denitrification system liquid ammonia evaporator, a connecting pipeline and valves, wherein the steam generator is connected with the continuous blowdown flash tank, has a vertical structure and a steam outlet at the top, is connected with a steam inlet on the side surface at the top of the ash bucket heater through the pipeline, and has a drain outlet at the bottom; an adjusting valve is arranged at the drain outlet; a drain outlet is formed on the side surface of the bottom of the dust catcher ash bucket heater; the denitrification system liquid ammonia evaporator is provided with a heating medium inlet, a heating medium outlet, a liquid ammonia pipeline inlet and a gas ammonia pipeline outlet; and the drain outlets of the steam generator and the ash bucket heater are connected with the heating medium inlet of the denitrification system liquid ammonia evaporator through a drain converged pipeline.

The invention discloses a high-efficiency wire stripping tool structure, which comprises an inner cutting cylinder, two tool posts, connecting assemblies, a movable rod and two annular adjusting parts, wherein locating grooves are arranged in the outer wall of the inner cutting cylinder; the front end of the inner cutting cylinder is fixedly connected with an adjusting cylinder; the tail end of the movable rod is located in the inner cutting cylinder and the front end is located in the adjusting cylinder; the movable rod is fixedly connected with a locating element; the two annular adjusting parts sleeve the adjusting cylinder and are located at two sides of the locating element respectively; each connecting assembly comprises two connectors; the two tool posts are provided with blades B; an opening is formed in the bottom part of each locating groove; and the inner cutting cylinder is sleeved with an outer cutting cylinder for installing a blade A. The high-efficiency wire stripping tool structure is capable of changing the positions of the blades B on the two tool posts relative to the blade A by rotating the two annular adjusting parts when applied to waste cables with different diameters, and the blade A and the blades B can be in tight contact with the inner wall of an insulating layer of each cable, so that the universality of the high-efficiency wire stripping tool structure is improved.

The invention discloses a treatment process for oil-contained sludge generated by oilfield wastewater treatment. The treatment process comprises the following steps: subjecting the oil-contained sludge to acidification deoiling treatment so as to obtain oil-reduced sludge; and subjecting the oil-reduced sludge to oxidation degradation treatment so as to obtain quantity-reduced oily sludge. The treatment process provided by the invention adjusts the oil-contained sludge in a range of neutral to weak acidity by utilizing acid, so a part of acid soluble inorganic matters in the oil-contained sludge is dissolved and corroded, and more importantly, crude oil adsorbed on clay can be desorbed and separated; thus, the purposes of recovering oil resources and improving oily sludge density can be easily achieved. Meanwhile, the treatment process provided by the invention can relieve cross-linking and adsorption states of high-molecular polymers, promotes oxidation degradation of polymers, facilitates to increasing migration space of free-state water molecules in the oily sludge, is favorable for solid-liquid separation of the oily sludge, and reduces energy consumption of centrifugal dehydration, thereby improving settleability of a solid phase in the oil-contained sludge and facilitating to realizing quantity reduction and even harmless discharge of sludge.

The invention provides a dish-washing machine control method, a dish-washing machine and a computer readable storage medium, and the method comprises the following steps: when a drainage instruction is detected, a plurality of through holes are controlled to be opened, and an electromagnet is controlled to be electrified, so that a plurality of soft rubber particles located in a cavity enter a box body through the through holes, and the soft rubber particles are adsorbed on the bottom of the box body or / and the wall of the box body; then, the power-on duration of the electromagnet is obtained, and when the power-on duration is longer than the preset power-on duration, the multiple through holes are controlled to be closed, and the electromagnet is controlled to be powered off, so that the multiple soft rubber particles are located in the box body; and the dish washing machine is controlled to discharge food residues and waste water in the cavity according to the drainage instruction. The electromagnet is powered on, the magnetic field force attracts the multiple soft rubber particles to enter the box body and be attracted to the bottom or the wall of the box body, the purpose of recycling the multiple soft rubber particles is achieved, and the user experience is greatly improved.

The invention relates to a magnetic suspension high efficiency multifunctional permanent magnetic motor and belongs to the technical field of a permanent magnetic motor. The magnetic suspension high efficiency multifunctional permanent magnetic motor is characterized in that a motor casing is internally provided with a low power set inner wall casing of which one end is fixedly connected with or casted with a side wall of the motor casing into one body, the other end of the low power set inner wall casing is open, high power set and low power set stator core wire rods are attached to an inner wall of the motor casing, and a circular cylinder magnetic suspension rare earth magnetic steel body rotor of a magnetic suspension magnetic steel integral part is connected or casted between the high power set and low power set stator core wire rods. The magnetic suspension high efficiency multifunctional permanent magnetic motor is advantaged in that twice or multi-times increase power torques are realized, electric energy loss can be further reduced by 50-100%, an endurance mileage is enhanced by 50-100% based on a traditional same power mode, materials are saved by up to 50%, energy recycling efficiency reaches 50-100%, a start speed is 100km / h within 3-5 minutes, a problem of a low climbing start acceleration torque can be completely solved, and endurance capability is improved through high energy recycling.

The invention discloses a method for recovering and purifying an ethanol-ethyl acetate-piperazine waste solvent. The method comprises the following steps: S1, taking a waste solvent ethanol-ethyl acetate-piperazine, rectifying, separating ethanol and ethyl acetate, extracting piperazine from a tower kettle, and obtaining anhydrous piperazine in the purity greater than or equal to 99.5%(wt); S2, adding a certain amount of water into the ethanol and ethyl acetate obtained by rectification, washing with water to obtain an organic phase consisting of ethyl acetate and a small amount of water on the upper layer, and obtaining a water phase consisting of ethanol and water on the lower layer; and S3, carrying out azeotropic distillation on the organic phase obtained by water washing to obtain an azeotropic mixture of ethyl acetate and water at the tower top, and carrying out layering and liquid separation. According to the method, ethanol, ethyl acetate and piperazine are separated and water and other impurities are removed through rectification separation, extraction separation, azeotropic rectification separation and rectification coupling membrane separation and dehydration separation, so that purification, recovery and circulation of a solvent are achieved, generation of a waste solvent is reduced, and the production cost is reduced.