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110results about How to "With recycling" patented technology

Microporous-fiber composite sound absorbing board

ActiveCN102842303AImprove low-frequency sound absorption coefficientSound absorption frequency bandwidthSound producing devicesCompound aFiber
The invention provides a microporous-fiber composite sound absorbing board, belonging to the field of instruments for absorbing noises through adopting the resonance principle. The sound absorbing board has a good low-frequency sound absorbing effect, and the sound absorbing coefficient of the sound absorbing board is larger than 0.5 at 125Hz. Compared with an aluminum fiber absorbing board, the sound absorbing board has a wider absorbing absorption band. The sound absorbing coefficient of the sound absorbing board is not smaller than 0.4 at 250-1600Hz. The composite sound absorbing board is formed by compounding a micro-perforated board with an aluminum fiber board and adopts a double-resonance coupling structure. The micro-perforated board is connected with the aluminum fiber board through a keel frame to form a first resonating cavity, and the aluminum fiber board is connected with a wall through the keel frame to form a second resonating cavity. The micro-perforated board and the aluminum fiber board are coupled through a resonance peak to achieve the purposes of increasing the low-frequency sound absorbing effect and expanding the absorbing absorption band. The composite sound absorbing board adopting an all aluminum structure has the characteristic of good recycling, and the problems of aging, dropping and the like do not exist. The sound absorbing board also has the characteristic of good heat conduction, and is convenient for equipment to dissipate heat.
Owner:CHINA ELECTRIC POWER RES INST +3

Hot-air circulating two-layered snow melting system and method for recycling accumulated snow

The invention relates to a snow melting system and a method for recycling accumulated snow, particularly to a hot-air circulating two-layered snow melting system and the method for recycling accumulated snow, which solve the problems that the existing method for treating the accumulated snow wastes resource and pollutes the environment. The hot-air circulating two-layered snow melting system includes a two-layered subsurface-flow constructed wetland landscape pond and a snow melting well, wherein the snow melting well includes a thermal insulation cover, a well wall, a thermal insulation operation door, a heating grate A, a heating layer, a bottom heating pipe, a water drain pipe, a first step, a first rotating shaft, a heating vertical pipe, a groove and a filter grating. The method includes the following steps: collecting the accumulated snow, throwing the accumulated snow into the snow melting well through the thermal insulation operation door, and carrying the melted snow to the two-layered subsurface-flow pond through the deposited and overflowed clear water. The hot-air circulating two-layered snow melting system avoids the environmental pollution caused by snow melting agent, as well as the resource waste caused during accumulated snow transferring and toppling, is environment-friendly, facilitates the timely accumulated snow treatment, avoids the pollution caused by long-time exposure, and solves the road freezing problem caused by repeated freeze-thaw. The method is used for recycling the accumulated snow.
Owner:HARBIN INST OF TECH

Tin stripping liquid, method for removing tin-containing layer on base material and method for recycling simple substance tin

The invention discloses a method for recycling simple substance tin. The method for recycling the simple substance tin comprises the steps that a tin-containing layer on a base material is removed byusing tin stripping liquid to obtain tin stripping waste liquid, wherein the tin stripping liquid comprises nitric acid with the concentration being 5 g / L-100 g / L, a complexing agent with the concentration being 70 g / L-640 g / L, a stabilizer with the concentration being 10 g / L-150 g / L and an antioxidant with the concentration being 0.5 g / L-25 g / L, wherein the stabilizer comprises at least one of carboxylic acid compounds, urea compounds and amino acids; an extractant and the tin stripping waste liquid are mixed to make the nitric acid in the tin stripping waste liquid enter the extractant, andseparation is conducted to obtain the extracted tin stripping waste liquid and extraction liquid containing the extractant and the nitric acid; and diaphragm electrolysis is conducted on the extractedtin stripping waste liquid to obtain the simple substance tin. The method for recycling the simple substance tin has the advantages of regenerating and recycling of the waste liquid and zero discharge of the waste liquid.
Owner:苏州金易得环保科技有限公司

Method for absorbing carbon dioxide by using mixed solution containing ionic liquid

The invention relates to a method for absorbing carbon dioxide by using mixed solution containing ionic liquid, belonging to the technical field of carbon dioxide treatment. The mixed solution is mixed solution of ionic liquid A and ionic liquid B, or mixed solution of ionic liquid A or ionic liquid B and organic solvent C, wherein cations in the ionic liquid A are N, N-dialkyl imidazole cations and anions in the ionic liquid A are tetrafluoroborate radical anions, hexafluorophosphate radical anions or chloride ions; cations in the ionic liquid B are N, N-dialkyl imidazole cations and anions in the ionic liquid B are trifluoromethyl sulfamide anions; and the organic solvent C is methanol or acetone. The method comprises the steps of adding mixed solution containing the ionic liquid into a reaction kettle, vacuum pumping, feeding in CO2, keeping absorbing temperature to be 10-80 DEG C, agitating for absorption, and keeping CO2 balance pressure to be 0.01-10Mpa. The method for absorbing carbon dioxide by using mixed solution containing ionic liquid has the advantages that the solubility and the selectivity are higher and the defects of high volatility and high toxicity caused by a reason that pure organic solvent is used can be overcome at the same time.
Owner:BEIJING UNIV OF CHEM TECH

In-situ capturing treatment method for soil heavy metal pollution

The invention discloses an in-situ capturing treatment method for soil heavy metal pollution. The method comprises the steps of 1 deep ploughing and cleaning-up of soil, 2 burying of chelating capturing materials, 3 dry and wet adjustment, 4 soil heavy metal activation, 5 removing of the chelating capturing materials, 6 activating and recycling of the chelating capturing materials, 7 soil microelement supplementing and the like. According to the method, the chelating capturing materials are used for effectively removing water-soluble heavy metal, exchangeable heavy metal and part of carbonate-exchangeable heavy metal in soil, and the main route of soil heavy metal environmental risk transfer is effectively interdicted. The heavy metal chelating capturing materials adopted in the method can effectively treat trace metal pollution, high-concentration heavy metal pollution and multi-metal combined pollution, and the chelating capturing materials obtained after treatment can be activated and recycled. In addition, the method has the beneficial effects of being easy to operate, capable of being used in combination with other restoring methods easily, good in treatment effect, low in cost, free of secondary environmental risks and the like.
Owner:SHENZHEN DUOYUAN TUOZHAN ENVIRONMENTAL PROTECTION TECH CO LTD

Equipment for cyclic regeneration of construction waste into garden soil and garden soil manufacturing process

ActiveCN112024047ARealize cyclic crushingEffective first filter collectionSievingGas current separationEnvironmental resource managementMechanical engineering
The invention discloses equipment for cyclic regeneration of construction waste into garden soil and a garden soil manufacturing process. The equipment comprises an equipment box, a crushing box is fixedly connected to the left side of the inner wall of the equipment box, a first filter plate is fixedly connected to the right side of the inner wall of the equipment box, a first material guide plate is fixedly connected to the right side of the crushing box, and the first material guide plate is arranged below the first filtering plate, sequentially penetrates through the equipment box and a collecting box and extends into the collecting box. The left side of the equipment box is fixedly connected with a spiral conveying piece, the right side of the spiral conveying piece communicates witha feeding hopper, the right side of the spiral conveying piece communicates with a conveying pipe, and the conveying pipe penetrates through the equipment box and communicates with the top of the crushing box. The first filtering plate and a second filtering plate are arranged for filtering in the two transportation processes correspondingly, construction waste meeting the size condition can be effectively filtered and collected in advance, and does not need to enter the crushing box for unnecessary crushing, energy is saved, and the efficiency is improved.
Owner:SHENZHEN LEIXIN LANDSCAPE & CONSTR CO LTD

Lignosulfonate-phenolic resin based carbon aerogel microsphere as well as preparation method and application thereof

The invention discloses a lignosulfonate phenolic resin based carbon aerogel microsphere as well as a preparation method and application thereof. The preparation method comprises the steps of dissolving lignosulfonate, a phenolic compound, an aldehyde compound and a polyamine compound in water to obtain a water phase; mixing the water phase with a non-water-soluble oil phase, carrying out polymerization reaction under a stirring condition, filtering and separating after the polymerization reaction is finished, and carrying out water seal aging and drying on the obtained solid product to obtaindry gel microspheres; carrying out carbonization treatment on the dry gel microspheres, and washing to obtain the lignosulfonate phenolic resin-based carbon aerogel microspheres which are small in macroscopic particle size, developed in microscopic pore structure and large in specific surface area and contain polar groups and a molecular imprinting-like specific structure. The carbon aerogel microsphere material can be used for selective and efficient adsorption of heavy metals, and is especially suitable for remediation of heavy metal contaminated soil. The preparation raw materials of the carbon aerogel microsphere are wide in source and low in cost, so that large-scale production and application are facilitated.
Owner:WUHAN UNIV

Method for denitrifying rare earth ore wastewater by using supported microalgae

The invention provides a method for denitrifying rare earth ore wastewater by using supported microalgae, and belongs to the technical field of wastewater treatment. The invention provides a method for denitrifying rare earth ore wastewater by using supported microalgae, which comprises the following steps: carrying out quicklime precipitation on rare earth ore wastewater raw water to obtain clarified water; and denitrifying the clarified water, wherein the denitrification is carried out under the condition that flocculation microalgae and corncobs exist at the same time. According to the method provided by the invention, rapid, effective and economic treatment of the high-ammonia-nitrogen rare earth ore wastewater is realized; the total nitrogen and ammonia nitrogen removal capacity is high, the average ammonia nitrogen removal capacity is 83.3 mg. L <-1 >. d <-1 >, the average total nitrogen removal capacity is 86.7 mg.L <-1 >. d <-1 >, and the method further has a series of advantages of being low in treatment cost, simple in process operation equipment, stable in effect, environmentally friendly, capable of achieving rare earth element recycling and algae colony recycling and the like.
Owner:NANCHANG HANGKONG UNIVERSITY

Method for preparing furfural by inorganic salt-adopted composite catalysis of xylose in homogeneous system

InactiveCN104086517AHigh catalytic efficiencySynergistic catalytic efficiency is highOrganic chemistryXyloseCorrosion
The invention discloses a method for preparing furfural by inorganic salt-adopted composite catalysis of xylose in a homogeneous system. The method comprises that xylose and a composite inorganic salt are added into a homogeneous reaction system and undergo a reaction at a temperature of 110-160 DEG C for 10-600min, wherein the composite inorganic salt comprises an inorganic salt A selected from SnCl4, AlCl3 and CrCl3 and an inorganic salt B selected from LiCl, KCl and NaCl, the homogeneous reaction system is a mixed solution of water and dimethyl sulfoxide and a volume ratio of water to dimethyl sulfoxide is 0.5-1.5: 1, the reaction solution is naturally cooled and then is subjected to organic solvent-based extraction, and the extract is washed and distilled so that furfural is obtained. The homogeneous catalysis system used by the method has the characteristics of high efficiency, environmental friendliness and cyclic utilization. The composite inorganic salt has the characteristics of good selectivity and high catalytic efficiency. The method has the characteristics of mild technical conditions, operation easiness, high efficiency and good selectivity, is free of inorganic acid used in the reaction process and prevents corrosion on equipment.
Owner:SOUTH CHINA UNIV OF TECH

Method for regenerating waste lubricating oil by combining solvent extraction with composite metal oxide adsorbent

The invention discloses a method for regenerating waste lubricating oil by combining solvent extraction with a composite metal oxide adsorbent. The method comprises the steps: loading waste lubricating oil to be regenerated into a container, placing in a constant temperature drying box, depositing for at least 12 h, and removing primary upper clear oil; then adding an organic solvent to the primary upper clear oil, carrying out extraction and refining treatment, cooling the obtained oil-containing mixture to room temperature, then depositing the oil-containing mixture for at least 2 h, then removing secondary upper clear oil, next taking the secondary upper clear oil, mixing with the composite metal oxide adsorbent to form a reactant system, controlling the temperature of the reactant system to 60-90 DEG C, and decolorizing the secondary upper clear oil for 20-40 min; and finally, separating to remove a compound metal oxide decolorizer, and thus obtaining regenerated base oil. Qualityindexes of the waste oil treated by the method meet the requirement standards of the base oil, an acid-free and alkali-free process is adopted throughout the process, the yield of the regenerated oilis high, the repeated utilization rate of the adsorbent is high, and the requirements of green sustainable development are met.
Owner:SHANGHAI UNIV
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