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5866results about How to "Improve recycling efficiency" patented technology

Hydrocarbon gas processing

A process for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a lower mid-column feed position. A distillation stream is withdrawn from the column below the feed point of the stream and is then directed into heat exchange relation with the tower overhead vapor stream to cool the distillation stream and condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the fractionation tower at an upper mid-column feed position. A recycle stream is withdrawn from the tower overhead after it has been warmed and compressed. The compressed recycle stream is cooled sufficiently to substantially condense it, and is then expanded to the pressure of the fractionation tower and supplied to the tower at a top column feed position. The quantities and temperatures of the feeds to the fractionation tower are effective to maintain the overhead temperature of the fractionation tower at a temperature whereby the major portion of the desired components is recovered.
Owner:UOP LLC

Movable arm potential energy recovery method and apparatus of hydraulic excavator

The invention discloses a method for recovering potential energy of a movable arm of a hydraulic digging machine and a device thereof. The method comprises the following steps: firstly, the potential energy is stored through an energy accumulator in the retraction process of a hydraulic cylinder; and secondly the stored energy in the energy accumulator drives a generator to generate electricity, thereby realizing the recovery of the potential energy of the movable arm of the hydraulic digging machine. A mode for storing the potential energy is to convert the potential energy into pressure energy. The energy accumulator and the generator are connected through a proportioning valve so as to control the rotational speed of the generator. The method realizes high-efficiency recovery of the potential energy of the movable arm of the hydraulic digging machine; the principle of the method is to skillfully change the working time of hydraulic oil for power generation through the function of energy storage of the energy accumulator and provide effective buffering for recovering the potential energy; in addition, through the throttling control of the proportioning valve, the method reduces pressure fluctuation of the hydraulic oil in the power generation process, realizes the adjustment of the working rotational speed of the generator, improves the working efficiency of the generator and further improves the efficiency of energy recovery.
Owner:CENT SOUTH UNIV

Energy recovery system of hybrid power engineering machinery energy accumulator-hydraulic motor

The invention discloses a hybrid power engineering mechanical accumulator-hydraulic motor energy recovery system. The system mainly comprises an engine, a variable pump, variable frequency motors, a variable motor, a signal control unit, an accumulator and a hydraulic implementation element, and the like. In the system, the variable motor is coaxially connected with a variable frequency motor M2 and forms a composite energy recovery system with the accumulator so as to recover the gravitational potential energy and braking energy in the lowering process of an implementation mechanism. The variable pump, the engine and a variable frequency motor M1 are coaxially connected; a hybrid power system which consists of the engine and the variable frequency motor M1 drives the hydraulic implementation mechanism to rise and lift heavy objects together with the accumulator. The system overcomes the defects that the variable motor-power generator energy recovery system responds slowly and the specific energy of the accumulator is low, enhances the dynamic response performance of the energy recovery system, improves the working conditions of power generation of an electric generator, and simultaneously can directly recover part of potential energy by the accumulator, thus raising the energy recovery efficiency of the system.
Owner:ZHEJIANG UNIV

Electrohydraulic energy-regenerative type shock absorber

The invention relates to an electrohydraulic energy-regenerative type shock absorber, which comprises a hydraulic circuit, a working chamber and a piston, wherein the working chamber is divided into a piston working cavity and an accumulating power-generating cavity by a partition plate (13), and the piston is positioned in the piston working cavity and is connected with an external upper mounting base (7) through a piston push rod (8); a hydraulic motor (4) is positioned in the energy storage power-generating cavity and is connected with an external rotary generator (5) through a driving shaft, and an accumulator (3) is positioned in the accumulating power-generating cavity and is positioned below the partition plate (13); and the hydraulic circuit and a plurality of one-way valves (6) form a hydraulic rectifier bridge, and the hydraulic circuit adopts the method that an external pipeline is arranged outside the piston or the piston is designed to form internal and external cavities. The invention has simple structure, fewer components and small volume, can allow the energy generated by vehicle vibration to be fully used for doing work, can effectively recover vibration energy, has better shock absorbing effect than the existing shock absorber, and also prolongs the service life of the generator.
Owner:武汉经开科创运营有限公司

Differential energy recovery device and method for seawater desalination system

The invention discloses a differential energy recovery device and a method for a seawater desalination system. The differential energy recovery device comprises two hydraulic cylinders connected in parallel. A piston divides each hydraulic cylinder into two cavities. The piston is fixedly connected with a piston rod. A low-pressure raw water inlet is connected with two left cavities through liquid inlet valves. The left cavities are connected with a high-pressure raw water outlet through liquid drain valves. Two right cavities are connected with reversing valves. The reversing valves are connected with a high-pressure concentrated water inlet and are connected with a low-pressure concentrated drain outlet. The method is that high-pressure concentrated water coming from a reverse osmosis device is enabled to enter the right cavities of the two hydraulic cylinders through the reversing valves, and low-pressure raw water in the left cavities is pushed and pressurized to enter the reverse osmosis device. Since the direct pressurization principle of the hydraulic cylinders is used for the special design, one-time energy conversion is adopted and the pressure of high-pressure seawater after pressure exchange is larger than the pressure of concentrated saline water, the invention has the advantages that the pressurizing pumps are not required for pressurization once more, the energy conversion efficiency is high, the operating cost is saved and the energy consumption of the reverse osmosis system is further reduced.
Owner:TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI

Comprehensive heat energy utilizing type active coke purifying and regenerating process system and active coke purifying and regenerating process method

The invention discloses a comprehensive heat energy utilizing type active coke purifying and regenerating process system and an active coke purifying and generating process method. The process system comprises a regenerating device, a preheating device, a heating device and a heat exchanging device, wherein the regenerating device comprises a regenerating tower; the preheating device comprises a drying tower; the heating device comprises a hot-blast stove and a first fan; and the heat exchanging device comprises a second fan, a normal-temperature air input pipeline and a hot air output pipeline, wherein the second fan is used for sending the hot air after heat exchange to the drying tower so as to preheat the active coke. The method comprises the following steps: (1) preheating: preheating the active coke in the drying tower; (b) heating: heating the active coke due to the action of a high-temperature heat-conducting medium; (c) regenerating; and (d) cooling: cooling the regenerated active coke entering a cooling section. The system and method disclosed by the invention are suitable for restoring and regenerating the active coke.
Owner:SHANGHAI CLEAR ENVIRONMENTAL PROTECTION SCI & TECH

Dual-motor rotating speed coupling drive assembly

The invention provides a dual power coupling drive assembly adopting a dual-motor rotating speed coupling drive mode, and the dual power coupling drive assembly can meet the power demands of heavy vehicles in the process of running. In the invention, the rotating speed coupling of a planetary gear is used as the power coupling of a first motor 4 and a second motor 8; the first motor 4 and the second motor 8 are arranged at the same side, and the shafts of the first motor 4 and the second motor 8 are parallel to each other, the power output by the first motor 4 passes through a first speed reducer 3, a power input gear 2 and a gear ring external gear 12, the power output by the second motor 8 passes through a second speed reducer 9 and a sun gear 11, then the rotating speed coupling of the two motors are realized by the planetary gear, and a planet carrier 15 outputs power to a driving wheel 16.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Integrated nitrogen and phosphorus recovery device in struvite method

The invention discloses an integrated nitrogen and phosphorus recovery device in a struvite method, which relates to the field of environmental engineering water treatment and is a reactor for treating nitrogen and phosphorus-containing wastewater in a physicochemical method. Substances nitrogen and phosphorus in the wastewater are removed in a magnesium ammonium phosphate (struvite) form, and the substances are recovered and reused. The reaction device is in an integrated form, which comprises a precipitation zone, a mixing reaction zone, a crystal growth zone and a crystal trapping and water discharging zone from bottom to top sequentially, the mixing reaction zone is provided with a first-grade aerator, which is mainly a wastewater and reagent fully mixing and reacting zone; the crystal growth zone is provided with a second-grade aerator, which is mainly a struvite growth zone; in the precipitation zone, large-grain struvite crystals are mainly precipitated; and the crystal trapping and water discharging zone recovers the struvite crystals by a filter screen. In addition, the device uses external reflux to reinforce and to control the supersaturated rate of the struvite reaction, thus promoting the crystal growth. The device has simple technological process and has the advantages of short hydraulic retention time, high nitrogen and phosphorus recovery efficiency, high recovery pureness, little occupied area, low operation and maintenance cost and the like.
Owner:TONGJI UNIV

Method for recovering and preparing nickel-cobalt-manganese-aluminum quaternary positive electrode material from waste nickel-cobalt-manganese ternary lithium-ion battery

The invention discloses a method for recovering and preparing a nickel-cobalt-manganese-aluminum quaternary positive electrode material from a waste nickel-cobalt-manganese ternary lithium-ion battery. The method comprises the following steps of (1) obtaining a leach solution containing Cu<2+>, Al<3+>, Li<+>, Ni<2+>, Co<2+> and Mn<2+> from the waste ternary lithium-ion battery through manual disassembly, magnetic separation, crushing, organic solvent soaking, screening and sulfuric acid leaching, and carrying out purification (Cu<2+>) treatment on the leach solution to obtain a purified liquid; (2) adjusting the molar ratio of Al to Ni to Co to Mn in the purified liquid, adding alkali metal hydroxide, adjusting the pH of a system until the pH is greater than or equal to 10 and carrying out primary precipitation to obtain a turbid liquid in which NCM hydroxide is precipitated; (3) adding carbonate to the turbid liquid in the step (2) for secondary precipitation, and carrying out solid-liquid separation to obtain a quaternary material precursor; and (4) burning the quaternary material precursor in air to obtain an Al-doped NCM quaternary positive electrode material. The method is simple in technology, wide in raw material source and high in repeatability; the prepared quaternary positive electrode material is excellent in cycle performance; and large-scale production can be carried out.
Owner:CENT SOUTH UNIV

Engine stop control system for hybrid electric vehicle

An engine stop control system for a hybrid electric vehicle including a powertrain having an engine, an electric motor / generator, and driving wheels, including a first clutch coupling the engine to the motor / generator, a second clutch coupling the motor / generator to the driving wheels, a controller configured to select between two driving modes of the vehicle by controlling engagement and disengagement of the first clutch and the second clutch so that the vehicle may be driven either solely by the motor / generator or a combination of the engine and the motor / generator, and to control the stop position of the engine to be a desired stop position by controlling the rotation speed of the motor / generator while the first clutch in complete engagement and the second clutch in a slip state.
Owner:NISSAN MOTOR CO LTD

Excavator energy-recuperation system

An excavator energy-recuperation system relates to an excavator moving arm energy saving system, comprising a hydraulic cylinder, a fuel tank, a quantitative pump, a valve and an engine. The key technology is that a first variable pump and a speed determining photoelectric encoder are coaxial equipped with the quantitative pump. One end of the quantitative pump is connected with a hydraulic cylinder through a reversing valve and the other end of the quantitative pump is respectively connected with the fuel tank and the hydraulic cylinder on two branches. One end of the first variable pump is connected with the fuel tank and the other end is connected with an accumulator through the reversing valve. A second variable pump is coaxial arranged with the engine, one end of the second variable pump is connected with the fuel tank and and the other end is connected with a check valve; a fuel outlet of the check valve has three branches, wherein the first one is connected with the accumulatorthrough the reversing valve; the second one is connected with a hydraulic cylinder through the reversing valve; and the third one is connected with a hydraulic cylinder through the reversing valve. The invention combines the flow regeneration and potential energy recuperation, thus simultaneously realizing the flow regeneration and the energy-recuperation recycling, improving the utilization rateof the excavator energy and prolonging the service life of the excavator.
Owner:四川升腾元创机电技术研究有限公司

Method for recycling metal and combustibles from domestic waste incineration slag

The invention relates to a method for recycling metal and combustibles from domestic waste incineration slag, and belongs to the field of the solid waste harmless and recycling technology. By means of multi-stage gradient magnetic separation, separation of magnetic metal in the slag is achieved. By means of two-stage eddy current, nonferrous metal in the slag is separated and recycled. According to the grain size distribution and chemical morphological characteristics of the metal in the slag, the metal is crushed and screened in multiple steps so that separated slag particles can be uniform, the recycling rate of magnetic separation and eddy current separation is effectively increased, and finally, according to the density difference of materials, air separation is used for recycling the combustibles in the slag. Finally, the magnetic separation recycling rate of iron in the technological process is 60-80%, the recycling rate of the nonferrous metal aluminum is 60-70%, the recycling rate of the nonferrous metal copper is 40-50%, and separation of the metal in the slag and slag particles can be effectively achieved. The separated metal products can be directly sold or sold after refining, the combustibles can serve as waste incinerator fuel, and the remaining slag can be used as building materials.
Owner:TONGJI UNIV

Braking energy recovery control method and device and electric automobile

The invention provides a braking energy recovery control method and device and an electric automobile. The method includes the steps that on the basis of brake pedal displacement, the total required braking force of a driver is determined; according to capacity limiting conditions of a power system, an electric assistance braking system, the electric automobile and the automobile speed, the largest braking force capable of being provided by a motor is determined; according to different preset corresponding relationships between front axle braking force and rear axle braking force, a judgment threshold value used for braking force distribution is determined; according to the total required braking force of the driver, the largest braking force capable of being provided by the motor and thejudgment threshold value, the required braking force of the motor is determined; and when the required braking force of the motor is larger than zero, the motor is controlled to conduct braking energyrecovery. On the premise that the total required braking force of the driver is not changed, electric braking recovery is conducted to the maximum degree, the purposes that energy recovery efficiencyis high, and the overall braking comfort level of the electric automobile is high are achieved, and driving experience of a user is improved.
Owner:BEIJING ELECTRIC VEHICLE

Method for extracting high arsenic complicated golden ore concentrate multielement

The invention discloses a method for extracting high arsenic complicated golden ore concentrate multielement. The method comprises the following steps that: the multielement complicated golden ore concentrate with extra-high arsenic is subjected to the roast dearsenification technique treatment, part of sulfur in the multielement high arsenic golden ore concentrate converted into sulfur dioxide and the arsenic converted into arsenic trioxide enter flue gas which is subjected to dust and arsenic collection, and then enter an acid making system to produce sulphuric acid; the multielement smelting slag and multielement low arsenic golden ore concentrate obtained by roast dearsenification, return products and flux are mixed to obtain copper matte regulus, and the like by adopting oxygen enrichment bottom blowing matte smelting gold collecting process to carry out the smelting process; the copper matte regulus is subjected to converting and refining to cast an anode plate which is sent to an electrolysis system to obtain an electrolytic copper product by refining; anode mud generated through electrolysis is sent to a noble metal refine system to produce gold and sliver, and the like; smelting slag and converting slag are subjected to floatation treatment to obtain copper and iron ore concentrate; and the generated gangue belongs to harmless slag and can be used. The method has the characteristics of wide range of the raw material application, high synthesized recovery efficiency of valuable element, and obvious economic and environment benefits.
Owner:SHANDONG HUMON SMELTING
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