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an air purifier
InactiveCN103861421BLarger than surface and uniformGood adsorption and decomposition effectOther chemical processesDispersed particle separationActivated carbonHazardous substance
Owner:QINGDAO CHUANSHAN NEW MATERIALS
Decelerated centrifugal dust removing apparatus for dust cleaner
InactiveUS20030200736A1Avoid secondary pollutionSmooth rotationCombination devicesAuxillary pretreatmentLow noiseFilter system
The present invention discloses a decelerated centrifugal dust removing apparatus for a dust cleaner. It comprises a cylinder, a conical cylinder and a dust collector box connected in the given order from the upper part to the lower part, as well as an air outlet pipe and an air inlet pipe on the cylinder body. The conical cylinder has a small upper end and a large lower end. In the conical cylinder, on the lower part of the air outlet pipe (under the air outlet pipe) there is an umbrella-shaped reflector in the center of which is provided a hole for air returning. Between the periphery of the umbrella reflector and the side wall is provided an annular gap for the falling down of dust. The apparatus features small loss of air flow pressure, good effectiveness of air suction, high quality of dust filtering, and low noise. With the apparatus, the secondary pollution of the cleaned air can be effectively prevented, and it is especially suitable for use in a secondary stage filtering system of the dust cleaner and for separating small and fine dust particles.
Owner:SUZHOU KINGCLEAN FLOORCARE
Edible biological preservative film and preparation method thereof
ActiveCN104194354AImprove mechanical propertiesImprove barrier propertiesFlexible coversWrappersAntioxidantPlasticizer
The invention discloses an edible biological preservative film and a preparation method thereof. The edible biological preservative film comprises the following components in parts by weight: 30-60 parts of a film former, 1-10 parts of a natural antioxidant, 1-10 parts of a natural bacterial inhibitor, 1-4 parts of a plasticizer and 0.5-4 parts of an emulsifier. The preparation method comprises the following steps: mixing the components in proportion to form preservative film liquid, and preparing the preservative film by adopting a tape-casting process. According to the preservative film, excellent film forming performances of materials such as marine polysaccharides, chitosan, gelatin and the like are utilized, the natural antioxidant and the natural bacterial inhibitor are selected and used, and the modification process is carried out through the plasticizer, the emulsifier and the like, so that the prepared preservative film is good in mechanical property, delays the spoilage of an aquatic product and can effectively prolong the shelf life of the aquatic product.
Owner:MARINE BIOLOGY INST OF SHANDONG PROVINCE
Full-component resource reclamation method for waste positive electrode materials of lithium ion batteries
ActiveCN102751549AAvoid secondary pollutionImprove separation efficiencyWaste accumulators reclaimingBattery recyclingRecovery methodDistillation
The invention provides a full-component resource reclamation method for waste positive electrode materials of lithium ion batteries. The method comprises the following steps: 1) separating active substances and aluminum foils in waste positive electrode materials of lithium ion batteries by using an aqueous solution of fluorine-containing organic acid and carrying out liquid-solid-solid separation so as to obtain leachate, the lithium-containing active substances and the aluminum foils; 2) respectively carrying out high temperature roasting and impurity removal with alkali liquor on the lithium-containing active substances; 3) respectively carrying out recovery of the fluorine-containing organic acid through addition of acid and distillation, deposition of impurity ions through addition of alkali and ammonium carbonate coprecipitation on the leachate so as to prepare nickel-cobalt-manganese carbonate ternary precursor; and 4) carrying out component regulation on a mixture of the treated active substances and the nickel-cobalt-manganese carbonate ternary precursor, adding lithium carbonate in a certain proportion and carrying out high temperature solid phase sintering so as to prepare a lithium nickel cobalt manganese oxide ternary positive electrode material. The method provided in the invention has the following advantages: the application scope of the method is wide; separation efficiency of the lithium-containing active substances and the aluminum foils is high; short-flow direct re-preparation of positive electrode materials in waste lithium ion batteries is realized; and the method is applicable to large-scale resource reclamation of waste lithium ion batteries.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Pest-proof disease-resistant organic fertilizer and preparation method thereof
InactiveCN102775247AReduce diseaseReduce cropping diseasesBio-organic fraction processingOrganic fertiliser preparationMycoproteinHazardous substance
The invention relates to a pest-proof disease-resistant organic fertilizer and a preparation method thereof, belonging to the technical field of organic fertilizers. Tobacco waste and oil tea pulp are utilized as main raw materials to develop a method of the pest-proof disease-resistant organic fertilizer. The invention breaks through the limitations of harmful substances and single product effect due to addition of chemical materials in the traditional organic fertilizer. The pest-proof disease-resistant organic fertilizer is prepared from the following raw materials: tobacco waste, oil tea pulp, organic substances, a poising agent and a microbial inoculant. The preparation method of the organic fertilizer comprises the following steps: crushing tobacco straws, tobacco stems, tobacco powder, oil tea pulp and organic substances, spraying the poising agent and microbial inoculant, mixing, carrying out pool stack fermentation and strip stack fermentation, screening and granulating to obtain the insect-proof disease-resistant organic fertilizer. The high-efficiency biological insect-inhibiting factors contained in the organic substances containing massive mycoprotein can effectively inhibit and kill pests and pathogenic bacteria, and solve the problem of environmental pollution caused by the pesticide fertilizer.
Owner:刘奋安
Liquid-phase oxidation-absorption two-stage wet method flue-gas denitration technique
ActiveCN101385942ALow investment costLow running costDispersed particle separationPartial oxidationGas phase
The invention discloses a wet method smoke gas denitration technology of two segments of liquid phase oxidation and absorption, which adopts solution or mixtures of one or more of potassium permanganate, sodium chlorite, sodium hypochlorite, calcium hypochlorite, oxyful and chlorine dioxide as oxidizing agents to ensure nitrogen oxide in smoke gas contact and react with the oxidizing agents. After the nitrogen oxide is partially oxidized into nitrogen dioxide, oxidized nitrogen oxide in the smoke gas is absorbed by alkali liquid to generate corresponding nitrite. The technology adopts liquid phase oxidation to replace gas phase oxidation so as to reduce the investment and the running cost, simplify the technical process and the system structure, and enhance the operability. Compared with a method that oxidation and absorption are simultaneously carried out in the liquid phase, the two-segment technology not only can increase the removal efficiency, avoid secondary pollution caused by incomplete absorption of NO2, but also can achieve the purposes of selectively generating and recovering the nitrite in the absorption stage by controlling the oxidation degree of the oxidation stage.
Owner:ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
Chemical etching, cleaning and drying method of single-crystal silicon solar battery and integrated processing machine
InactiveCN101087007AImprove reflective effectAvoid secondary pollutionFinal product manufactureSemiconductor devicesEtchingWater source
Monocrystalline silicon solaode chemical etching, washing, drying method and integral processor belong to technique field of chemical etching technique and washing. It characterized in that it not only includes water, acid, alkali, but also ultrasonic participates in etching and washing course: it includes following steps: (1) ultrasonic washes and heats in advance, (2) ultrasonic removes damnification layer, (3) ultrasonic makes herbs into wool, (4) ultrasonic rinses, (5) washing with acid to counteract, (6) ultrasonic rinses, (7) cutting water, (8) hot enthalpy to dry. Positive effects of the invention are: adopting ultrasonic to etch and wash, liquid of making wool can be acted with silicon piece, similar coarseness degree can be generated on surface, perfect pyramid pattern can be obtained; it also eliminates kalium, natrium ion from alkalescent solution, and extends service life of silicon piece; pollution can be decreased, energy consumption and water source can be saved greatly, it is a practical invention.
Owner:SHANGHAI MINGXING KAICHENG ULTRASONIC TECH +2
Preparation method and application of heterogeneous Fenton-like catalyst
InactiveCN102909073ALow costEfficient degradationOrganic-compounds/hydrides/coordination-complexes catalystsWaste water treatment from textile industryFiberCarbon fibers
Disclosed are a preparation method and application of heterogeneous Fenton-like catalyst. The preparation method includes the steps of firstly, dissolving complexing agent and metal salt in distilled water to respectively prepare complexing agent and metal salt solutions; secondly dropwise adding the metal salt solution into the complexing agent solution under the action of a magnetic mixer, and mixing for 20-60 after dropwise addition to obtain metal complex solution; and thirdly, impregnating activated carbon fiber in the metal complex solution for 1-24h, and subjecting taken-out activated carbon fiber to distilled water washing and drying to obtain the heterogeneous Fenton-like catalyst. The preparation method is simple, and conditions are mild. Environment-friendly hydrogen peroxide is used as oxidant, no extra ultraviolet light or even visible light is needed, and the heterogeneous Fenton-like catalyst is capable of efficiently degrading organic pollutants such as dye within a wide pH range of 2-10. The heterogeneous Fenton-like catalyst is well repeatable, and secondary pollution of the homogeneous Fenton reagent caused by iron ions is avoided.
Owner:ZHEJIANG SCI-TECH UNIV
Composite hydrogel for adsorption of heavy metal ions and preparation method thereof
ActiveCN104226281ASimple preparation processGood biocompatibilityOther chemical processesAlkali metal oxides/hydroxidesIonHeavy metals
The invention discloses composite hydrogel for adsorption of metal ions and a preparation method thereof. The hydrogel comprises, by weight, 5-95 parts of polyvinyl alcohol, 5-95 parts of chitosan, 0.1-20 parts of modified graphene oxide and 2-6 parts of sodium alginate, the weight ratio between the polyvinyl alcohol and the chitosan is (5: 95)-(95: 5), modified graphite oxide includes modified graphene oxide modified by dopamine and / or modified graphene oxide modified by ferroferric oxide, all components are uniformly mixed in a certain sequence, and the composite hydrogel is obtained under special conditions. The composite hydrogel for adsorption of the heavy metal ions and the preparation method thereof have the advantages that high speed, high efficiency, high adsorption capacity and high selectivity are achieved, the adsorption effect on the heavy metal ions is remarkable, meanwhile, the preparation process is simple, and the operability is high.
Owner:JIANGNAN UNIV
Method for repairing soil polluted by heavy metal by combining chemical leaching and bioremediation
ActiveCN102909215AGood restorativeAvoid secondary pollutionContaminated soil reclamationHigh concentrationBioremediation
The invention belongs to the technical field of environment protection, and discloses a method for repairing soil polluted by heavy metal by combining chemical leaching and bioremediation. To repair soil with a high heavy metal content and high toxicity, the invention provides the method adopting a strategy of carrying out chemical leaching and bioremediation in sequence. The method comprises the following steps: firstly, classifying different types of polluted soil into seriously polluted soil and mildly polluted soil; then leaching seriously polluted soil by adding acidic chelating agent and extracting high-concentration heavy metal in soil; and conducting bioremediation on part of residual low-concentration polluted soil which is not leached completely. The method is used for in-situ repairing of heavy metal, has an obvious effect in repairing soil polluted by heavy metal, and successfully avoids secondary pollution to soil.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Neutral inorganic composite material for dehydration, solidification and modification of high water content sludge
ActiveCN101955345ASolving Alkaline ProblemsHigh compressive strengthSludge treatment by de-watering/drying/thickeningSolid waste managementHazardous substanceHigh water content
The invention discloses a neutral inorganic composite material for dehydration, solidification and modification of high water content sludge. The composite material comprises a powdery mixture consisting of the following components in part by weight: 100 parts of water hardened solidifying material consisting of hydrated gypsum and magnesium oxide, 80 to 120 parts of inorganic water absorption ash material, 20 to 40 parts of inorganic substance aid hardened material, 1 to 10 parts of high polymer coagulant and 1 to 5 parts of modifying functional agent. After being treated by the neutral inorganic composite material, the solidified sludge has high compressive strength; the pH of the lixivium is neutral, and meanwhile, harmful substances such as heavy metal and the like in the sludge can be effectively solidified; the treated sludge meets the requirement of landfill soil, soil for earthwork or soil for greening and farmlands; and the neutral inorganic composite material can be widely applied to the dehydration, solidification and modification of the high water content sludge such as sludge from waterworks, dredged bottom mud of rivers and lakes, residual building soil and the like.
Owner:江苏艾特克环境工程有限公司
Magnetic submicron composite core-shell particles, and preparation method and application thereof
InactiveCN102360659ALarge specific surface areaGood value for moneyOther chemical processesInorganic material magnetismSewageSolvent
The invention discloses magnetic submicron composite core-shell particles. In the magnetic submicron composite core-shell particles, Fe3O4 particles with the particle size of between 80 and 800nm are taken as a magnetic core, amorphous SiO2 is taken as an immediate shell layer and a substance with heavy metal absorption performance is taken as an outer shell layer. The invention also discloses a preparation method for the magnetic submicron composite core-shell particles. The preparation method comprises the following steps of: preparing the Fe3O4 particles with the particle size of between 80 and 800nm by a solvothermal method and taking the Fe3O4 particles as magnetic cores, performing alkaline hydrolysis of a silicon source reagent on Fe3O4 and dehydrating and condensing hydroxy groups so as to obtain amorphous SiO2 immediate shell layers, and coating the substance with heavy metal absorption performance on obtained submicron spheres under chemical or physical action to obtain the magnetic submicron composite core-shell particles. The submicron material has high performance of absorbing heavy metal ions in the sewage; and the material has stable characteristics, can be magnetically recovered and meets environmental protection requirements, and secondary pollution is avoided.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Biomass magnetic carbon material for degrading organic dye
InactiveCN103480331AHigh catalytic activityPromote degradationOther chemical processesAlkali metal oxides/hydroxidesPtru catalystOrganic dye
The invention relates to a biomass magnetic carbon material for degrading organic dye. The material is prepared by mixing a biological raw material and an iron precursor at a ratio of (2-20kg):1kg. Meanwhile, the invention also discloses a preparation method of the biomass magnetic carbon material. The biomass magnetic carbon material provided by the invention is cheap and efficient and has double effects of adsorption catalysis and degradation; serving as an efficient catalyst in a process of constructing a Fenton-like system for treating high-concentration wastewater, the biomass magnetic carbon material has high catalytic activity in thoroughly oxidizing and degrading organic dye; the degradation effect is better than that of a ferrous ion homogeneous catalysis reaction and a Fenton-like reaction taking ferroferric oxide as a catalyst.
Owner:LANZHOU UNIVERSITY
Ceramicite using ash from incineration of refuse as raw material and its prodn. method
InactiveCN1830885AAvoid secondary pollutionReduce waste of resourcesCeramic materials productionClaywaresPelletizingIncineration
A haydite is prepared from the fly ash (20-80 Wt%) generated by burning garbage and clay (rest) through mixing, granulating, and high-temp calcining at 1000-1400 deg.C.
Owner:天津渤海环保工程有限公司
Treatment technology of producing sulfuric acid from alkylated spent sulfuric acid through high temperature decomposition
ActiveCN1751984ARealize lysis treatmentAvoid secondary pollutionSulfur-trioxide/sulfuric-acidDecompositionContact method
A process for preparing sulfuric acid from used alkylating sulfuric acid by high-temp cracking includes such steps as heating to 1000-1100 deg.C, cracking, acid washing for cleaning, converting twice by contact method, and absorbing twice to obtain qualified sulfuric acid for reuse. It has high recovering rate.
Owner:PETROCHINA CO LTD
Techhnique for reclaiming metal concentrate in obsolete PCB physically
InactiveCN1563440ASolve resource problemsAchieve recyclingSolid waste disposalProcess efficiency improvementDouble teethMagnetic separator
A physical recovery technology of metal enriched materials from waste CB applies a mechnanical and physical sorting method to cut, crush, screen, sort and separate the waste CB by a double tooth roll shearer, a punch crusher, a magnetic separator, a separating screen, a rotary static separator, high efficient centrifugal separator to get a multicomponent of metal rich collection and a nonmetal enriched material to recover all valuable components from waste CB.
Owner:CHINA UNIV OF MINING & TECH
Thermal desorption method for contaminated soil
ActiveCN102218446AAvoid secondary pollutionKeep the inherent characteristicsContaminated soil reclamationIncinerator apparatusThermal desorption spectroscopyFlue gas
The invention discloses a thermal desorption method for contaminated soil, which comprises the following steps of: performing thermal desorption on the contaminated soil at the temperature of between 400 and 650 DEG C; incinerating gaseous contaminant-containing flue gas which is discharged by the thermal desorption step at the temperature of between 750 and 1,200DEG C; and performing afterheat utilization and tail gas treatment on the incinerated flue gas. When the thermal desorption method is used for treating the contaminated soil, the destruction and removal efficiency for the organic contaminants in the contaminated soil is over 99 percent, the tail gas meets the emission standard, and the possible secondary pollution in the process of treating the contaminated soil is stopped, so that the effective innocent treatment is realized and the original reutilization property of the soil is maintained.
Owner:BEIJING ECO ISLAND SCI & TECH +1
Integrated converting and utilizing co-production method for agricultural waste
InactiveCN102476129AWidely used valueAvoid secondary pollutionSolid waste disposalBiofuelsBiofuelFuel oil
The invention relates to an integrated utilizing technology for agricultural waste and in particular relates to an integrated converting and utilizing co-production method for agricultural waste. The integrated converting and utilizing co-production method comprises the following steps: 1. collecting and processing raw materials; 2. carrying out pyrolysis on the raw materials: generating biochar and high-temperature mixed gas; 3. converting the high-temperature mixed gas: converting the high-temperature mixed gas into wood tar, wood vinegar and fuel gas; 4. manufacturing fertilizers; 5. refining fuel oil: converting the wood tar into biofuel oil and wood pitch; 6. purifying the fuel gas: purifying the fuel gas into clean fuel gas; and 7. converting the fuel gas: respectively sending the biofuel gas into a gas generator, a gas supply pipe network and a heat boiler to covert the biofuel gas into heat energy and electricity energy. The agricultural waste can be converted by multiple levels and are combined to be utilized to obtain straw carbon, fuel gas, heat energy, electricity energy, fertilizers, fuel gas and the like. The use ratio of the agricultural waste reaches 100%. The problem that the agricultural waste is stacked and burnt disorderly can be solved, the pollution problem caused by using chemical fertilizers and pesticides for a long time can be solved, and the problem of utilizing energy, fertilizer and oil in rural areas also can be solved.
Owner:周仁福 +2
Method and applications thereof for recovering MnO* from anode material of wasted lithium manganate battery
InactiveCN101538655AGood effectAvoid high temperature calcination processProcess efficiency improvementBattery recyclingElectrical batteryManganate
A method for recovering MnO2 from the anode material of a wasted lithium manganate oxide battery comprises the following steps of firstly obtaining an anode active material by pre-disposing assembled anode sheets with alkaline solution, etc., subsequently taking the anode active material as a raw material and obtaining a Lambda-MnO2 by soaking the raw material in an inorganic acid or a normal-pressure acid, or obtaining an Alpha- / Beta- / Gama-MnO2 by soaking the raw material in a hydrothermal acid. The method has simple process, little used acid and convenient separation and purification; the obtained various crystal-type MnO2 with large specific surface area and porous structure can be applied directly to be as a catalyst for synthesizing ester compound or disposable battery anode material of Li / MnO2 or electrode material of a super-capacitor.
Owner:HEFEI UNIV OF TECH
Graphene material coating and preparing method thereof and air filtering device and system
InactiveCN106192376AImprove adsorption capacityUniform circulationGas treatmentDispersed particle filtrationHazardous substanceAir filter
The invention relates to the technical field of air filtering, in particular to a graphene material coating and a preparing method thereof, and further relates to an a air filtering device and system based on the graphene material coating. The preparing method of the graphene material coating includes the following steps that S1, slurry-dispersion raw liquid is prepared, wherein a dispersing agent and a bonding agent are added into a solvent, and the mixture is stirred to generate the slurry-dispersion raw liquid; S2, a graphene surface coating is formed, wherein graphene powder is added into the slurry-dispersion raw liquid, the mixture is stirred to allow slurry to be even to be applied to the surface of a carrier, drying is carried out, and the graphene-material-coating finished product is obtained. By means of the graphene material coating and the preparing method thereof, the adsorption rate of hazardous substances in gas can be increased, and secondary pollution caused by unfirm adsorption is avoided.
Owner:张麟德
Oil tank cleaning robot
InactiveCN102764750ARealize all-round cleaningCompact structureHollow article cleaningDrive wheelUltrasonic sensor
The invention discloses an oil tank cleaning robot. The robot comprises a robot body, a walking unit, a cleaning unit, a control unit, a sensing communication unit and a power supply unit, wherein the robot body comprises a base plate, a lower casing and an upper casing, the walking unit comprises three driving wheels and three driving wheel hydraulic motors, the cleaning unit comprises a cleaning device and a self-excitation pulse device, the cleaning device comprises three cleaning disk brushes and three cleaning disk brush hydraulic motors, the self-excitation pulse device comprises a pulse device hydraulic motor, a retractable beam assembly and a self-excitation oscillating pulse nozzle, the control unit is composed of a remote control portion and a robot body control portion, and the sensing communication unit comprises a pressure sensor, a temperature sensor, an infrared sensor, an ultrasonic sensor, a horizontal attitude sensor, a turbidity sensor, a camera and an oil-gas concentration monitor. The robot is novel in design, high in intelligent degree, high in working reliability, good in safety performance, energy-saving, environment-friendly, high in practicability, high in popularization and application value and capable of achieving omni-directional cleaning.
Owner:周利坤
Algae-enhanced urea, production method thereof, and purpose thereof
The invention relates to algae-enhanced urea and a production method thereof. According to the invention, a fertilizer is produced through steps that: natural algae and urea are adopted as raw materials; algae is subject to microbe fermentation, and is subject to processes such as extraction and press-filtration, such that an algae enhancing liquid is prepared; molten urea solution and the algae enhancing liquid are granulated in an urea granulating tower, such that the algae-enhanced urea provided by the invention is obtained. With the algae-enhanced urea, soil urease activity can be substantially inhibited. The algae-enhanced urea has an enhanced fertilizer releasing-retarding effect. With the algae-enhanced urea, a utilization rate of fertilizer is improved by 5-10%, and agricultural cultivation can be simplified; nutrient loss can be reduced; secondary pollution can be avoided; and agricultural production cost can be reduced. The algae-enhanced urea is advantaged in wide raw material source, convenient transportation, and convenient application. With the algae-enhanced urea, mechanical working can easily be carried out. Therefore, the algae-enhanced urea has a wide prospect in production.
Owner:INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
Method of handling spent catalyst
The present invention belongs to the field of environment protection and resource utilization ,and is especially waste catalyst processing method. The waste catalyst processing process includes pre-treatment; dry distillation at temperature 400-800 deg.c for 1-2.5 hr to obtain dewatered, deoiled and desulfurized water catalyst white recovering dried gas; mixing waste catalyst with flux, trapping agent and reductant to obtain mixed material; high temperature smelting at 1500-1900 deg.c to convert into melt and smelted tail gas and treated for reuse. The present invention is one environment protecting process producing no secondary pollutant while recovering the components in waste catalyst, has metal recovering rate as high as 93 % and full utilization of waste catalyst resource.
Owner:DALIAN DONGTAI INDAL WASTE TREATMENT
Method for producing baking-free bricks by using phosphorous gypsum based cementitious material to solidify yellow phosphorous slags
InactiveCN101637936ASolve pollutionLow costSolid waste managementMixing operation control apparatusBrickSlag
Owner:KUNMING UNIV OF SCI & TECH
Chemical oxidation remediation method for organism-contaminated soil and remediation device
ActiveCN101648207AIncrease contactAvoid secondary pollutionContaminated soil reclamationContaminated soilsSoil remediation
The invention relates to a chemical oxidation remediation method for organism-contaminated soil and a remediation device. The device comprises an oxidant pot, a catalyst pot, a chelating agent pot, aflexible pipe, an electric valve, a control apparatus, a valve switch, a pump, a flow valve, a reactor, a stirrer, a stirrer switch, a sealing cover, a liquid inlet pipe, an exhaust pipe, a gas-liquidseparating apparatus and a tail gas treating apparatus. The method comprises the following steps: placing contaminated soil into the reactor; firstly injecting 0.03-0.4mol / (kg soil) of citric acid into the reactor through the chelating agent pot; then adding 0-0.4mol / (kg soil) of catalyst ferrous sulfate in the catalyst pot, and adding water to be dissolved to prepare 0.5mol / l of catalyst; injecting the catalyst into the reactor by the pump; pumping 1-2mol / (kg soil) of oxidant hydrogen peroxide into the reactor; and fully stirring the three preparations and the contaminated soil by the stirrer in the reactor to oxidize and degrade polycyclic aromatic hydrocarbon in the soil, and the removal rate of pollutants in the soil exceeds 80 percent. The invention has high efficiency on organics-contaminated soil remediation and can not cause secondary pollution to the soil.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Purpose of heavy metal sludge, acid pellet and preparation method and purpose thereof
ActiveCN101805827AEnsure the quality of the furnaceImproving the Blast Furnace Charge StructureBlast furnace detailsHeavy metalsSludge
The invention discloses a purpose of heavy metal sludge, an acid pellet and a preparation method and a purpose thereof. The invention takes stainless steel cold-rolling heavy metal sludge as a raw material for preparing the acid pellet of the sludge. The acid pellet of the sludge is mainly prepared by the following raw materials by weight percent: 5-50 percent of stainless steel cold-rolling heavy metal sludge, 30-70 percent of iron ore concentrate, 2-8 percent of composite binding agent, 4-15 percent of carbon powder and 10-30 percent of water. The preparation method of the acid pellet of the sludge comprises the main steps of pretreatment of raw materials, mixing of raw materials, pelletizing and roasting. The acid pellet of the sludge is used as a raw material of a blast furnace. The invention solves the problems that the prior art can not effectively treat and comprehensively utilize the stainless steel cold-rolling heavy metal sludge.
Owner:BAOSHAN IRON & STEEL CO LTD
Fermented alga liquid fertilizer synergist and production method and application thereof
ActiveCN102701866AGood sustained release effectInhibition of urease activityFertilizer mixturesRoot growthSeaweed fertiliser
The invention relates to a fermented alga liquid fertilizer synergist and a production method and an application thereof. The fertilizer synergist is a fermented alga liquid fertilizer synergist obtained by performing microbial fermentation on natural alga serving as a raw material, preparing an alga extracting solution through procedures such as alkali extraction, filter pressing and the like, and adding chelated state trace elements into a liquid. Due to the adoption of the fermented alga liquid fertilizer synergist disclosed by the invention, the soil urease activity can be suppressed remarkably, slow release of a fertilizer is enhanced, and the crop yield can be increased remarkably; trace elements such as boron, zinc, manganese and the like which are generally lacked in soil in China can be replenished; root growth of crops can be facilitated, root activity is increased, and the capabilities of crops of absorbing phosphorus, potassium and medium and trace elements are increased; and the fermented alga liquid fertilizer synergist has the characteristics of reduction in nutrient loss, avoidance of secondary pollution, reduction in the production cost of a synergic fertilizer, wide raw material source, convenience for adding in fertilizer production and the like, and has a wide application prospect in the production of the synergic fertilizer.
Owner:INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
Preparation and application of carboxymethyl cellulose of wheat straw
InactiveCN101985479AReduce dosageImprove stabilityOther chemical processesWater contaminantsChloroacetic acidsChloroacetic acid
The invention discloses carboxymethyl cellulose of wheat straw. The wheat straw is crushed and subjected to pretreatment with dilute alkali, bleaching and alkalization, and then reacts with chloroacetic acid before being etherified so as to obtain the carboxymethyl cellulose of the wheat straw; and the carboxymethyl cellulose of the wheat straw is subjected to graft copolymerization together with acrylic acid to obtain a carboxymethyl cellulose-based polymer adsorbent. The adsorbent is applied to the treatment of wastewater containing heavy metal ions, has high adsorbability and large adsorption capacity and ensures high metal ion removal rate. After treatment, the adsorbent has high stability and can completely meet the requirements of heavy-metal wastewater treatment; and the treated wastewater is clear and transparent without odor and can meet the national emission standard. The invention has the advantage that the resources of raw materials are wide, the cost is low, the use of waste is realized, and secondary pollution caused by burning of the wheat straw is avoided, thus being conducive to environmental protection.
Owner:GANSU TIPTOP PLANT TECH CORP
Method for recovering rare earth from waste rare earth luminescent material
InactiveCN102660688AHigh recovery rateProtect environmentGlass recyclingCerium oxides/hydroxidesRare-earth elementGlass matrix
The invention relates to a method for recovering rare earth from waste rare earth luminescent material, comprising the following steps: collection of waste rare earth luminescent material, including quick identification on rare earth fluorescent lamp and dismantling and breaking of the rare earth fluorescent lamp, breaking of a CRT display, and peeling and collection of the waste rare earth luminescent material and a glass matrix; pretreatment on the waste rare earth luminescent material, including demercuration oxidation precipitation, alkali fusion and acidolysis; extraction separation of rare earth elements to obtain rare earth chloride enrichment; extraction purification of the rare earth elements to obtain high-purity rare earth chloride; precipitation separation of the rare earth elements to obtain oxalate rare earth or carbonic acid rare earth precipitates; and sintering of the oxalate rare earth or carbonic acid rare earth precipitates to obtain high-purity-level rare earth oxide. The method realizes separation of rare earth elements including Ce, Eu, Tb and Y from impurity elements including Mg, Ba, Ca and the like and complete separation and recovery of light, mediate and heavy rare earth elements, and purification is carried out to obtain the high-purity rare earth oxide, so that the resources are comprehensively recycled, the process flow is reasonable, economic and practical, the rare earth recovery rate is high and the added value of the product is high.
Owner:UNIV OF SCI & TECH BEIJING
Deep treatment method for cyanide-containing waste water of tailings pond in gold industry
InactiveCN103253834AGood processing effectReduce processing costsMultistage water/sewage treatmentChemistryHeavy metals
The invention discloses a deep treatment method for cyanide-containing waste water of a tailings pond in the gold industry. The process adopts an ozone oxidation method, a catalytic oxidation method and a biological treatment method to collectively deeply treat the cyanide-containing waste water of the tailings pond in the gold industry. Through the combination of the three methods, a good treatment effect on the cyanide, thiocyanate, arsenic and heavy metals is good, the content of the cyanide after being treated is less than or equal to 0.05mg / L, the content of ammonia and nitrogen after being treated is less than 1mg / L, and other pollutants after being treated can meet the requirement of the ground surface water grade-B water quality standard. The method is used for treating the cyanide-containing waste water of the tailings pond in the gold industry, the treatment effect on the cyanide, the COD, As and heavy metals is good, the heavy metals such as the gold and silver as well as other metal resource can be recovered, and the secondary pollution caused by the ammonia and nitrogen can be avoided. By adopting the deep treatment method for the cyanide-containing waste water of the tailings pond, a good environment, a good economic benefit and a good social benefit can be achieved.
Owner:CHANGCHUN GOLD RES INST
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