98results about How to "Reduce pollution hazards" patented technology

The invention belongs to the field of environmental protection; and aiming at problems of high quantity, complex components and no proper process treatment of mercury-contained tailings generated by nonferrous metal mines and nonferrous smelting enterprises in a production process, the invention discloses a method for recovering mercury from the mercury-contained tailings through complexing extraction and consolidating decomposition. The method comprises the following steps: the complexing extraction is performed for the mercury-contained tailings by adopting mixed solution of thiosulfate and selenium generation of sulfate, so that transfer-state mercury in the mercury-contained tailings is transferred into leaching agent; and the consolidating decomposition is performed for the mercury in the leaching agent and a complex, formed by a thiosulfuric acid radical and a selenium generation of sulfuric acid radical, through a method of heating and feeding carbon dioxide gas, so that the mercury is finally converted to stable mercury sulfide/mercury selenide to form precipitates. The method is simple in operation; and the transfer-state mercury in the mercury-contained tailings is converted to a form of mercury sulfide and/or mercury selenide precipitates with low solubility, high stability and low toxicity, so that the pollution harm of the mercury in the mercury-contained tailings to environment is effectively reduced.

The invention discloses a recovery method of rare earth metal electrolysis fused salt slag. According to the method, waste fused salt slag generated in the rare earth fused salt electrolysis process of a fluoride system is adopted as raw materials, rare earth fluoride is obtained through raw material classification, crushing, mixed acid dissolution leaching, washing, filter pressing and filter residue firing, rare earth oxide is obtained after filter liquor is subjected to extraction separation, oxalic acid precipitation and firing, and waste liquid generated after filter liquor extraction is subjected to fluorination precipitation and drying to obtain a lithium fluoride solid. According to the method, operation is easy, cost is low, and environment friendliness and energy saving are achieved; no sodium hydroxide or concentrated sulfuric acid is adopted, a hydrochloric acid/nitric acid mixed system is adopted, no hydrogen fluoride or sulfur dioxide gas polluting the environment is generated, and the environment pollution hazard is relieved; and two kinds of rare earth products of rare earth fluoride and rare earth oxide and the lithium fluoride solid wide in application range are obtained at the same time, and the aim of comprehensive recovery and utilization of secondary resources is achieved.

The invention discloses new technology for plating golden yellow on an automotive hub, which comprises the technical steps: galvanizing, pre-plating copper, brightly plating copper, plating nickel, plating golden yellow, and the like. The chemical composition formula contained in each L of plating solution is that: galvanizing solution comprises 220 to 240g of potassium chloride, 40 to 55g of zinc chloride, 30 to 35g of boric acid, and 15 to 25ml of brightener; copper pre-plating solution comprises 70 to 85g of copper phosphate, 280 to 350g of phosphor copper potassium, 4 to 6ml of ammonia water, and 3 to 5ml of brightener; the bright copper plating solution comprises 200 to 220g of copper sulfate, 70 to 90g of sulfuric acid, 0.06 to 0.08g of chloride ion, and 4 to 8ml of brightener; nickel plating solution comprises 260 to 300g of nickel sulfate, 30 to 50g of nickel chloride, 30 to 40g of boric acid, 0.6 to 1ml of brightener, 8 to 12ml of softening agent, and 2 to 4ml of wetting agent; and golden yellow plating solution comprises 120 to 140g of imitation gold salt and 2 to 4ml of ammonia water. After the plating, water washing and drying are performed, and a polyurethane paint is sprayed on the surface of the automotive hub. The new technology for plating golden yellow on the automotive hub radically eliminates the damage and environmental pollution of sodium cyanide and chromic anhydride to human bodies; the plated golden yellow automotive hub is luxurious and attractive, has strong corrosion resistance, and is suitable for high-class automotive assembly.

The invention relates to a buoy type water body in-situ restoration apparatus. The structure of the buoy type water body in-situ restoration apparatus comprise a buoy body, a power supply system, a power system, a bacterial agent bin and a water quality detector, wherein the buoy body comprises an outer shell and a rubber ring, the rubber ring is positioned below the outer shell, the outer surfaces on both sides of the outer shell are symmetrically provided with two pulling rings, a buoy body filler for enhancing the buoyancy force of the apparatus is arranged in the outer shell, the top portion of the outer shell is provided with an antenna, and the antenna is connected to the power supply system inside the outer shell. According to the present invention, the operation is simple, and the screw propeller power system can be opened in the remote control manner; the solar power supply is designed, and the bacteria agent bin structure fixed repair agent is designed, such that the time and the labor cost are saved, and the apparatus is economical and practical; by designing the water quality detector, the environment quality of the water quality can be simultaneously monitored; and the apparatus can be effectively used for the microorganism in-situ restoration of polluted still lakes and moving rivers.

The invention relates to a cyanogen-containing barren liquor purification treatment and comprehensive utilization method. By using smoke acid production tail gas, waste acid (diluted acid) and cyanogen-containing barren liquor generated after cyanogenation gold extracting, decyanation is performed by means of a secondary treatment technology; a primary treatment technology comprises the steps of performing a neutral reaction by the cyanogen-containing barren liquor, the waste acid and the acid production tail gas, producing cuprous rhodanide sediment in the reaction, controlling PH to be 5-6 at the endpoint of the reaction, filtering to recycle cuprous rhodanide, and for liquid after the neutral reaction, adjusting PH to be 7-8 by using NaOH, thus obtaining liquid after primary treatment; the secondary treatment technology comprises the steps of adding sodium pyrosulfite, FeSO4 and H2O2 into the liquid after the primary treatment, and performing decyanation by an air oxidation blow-off method. The GB8978-1996 integrated wastewater discharge standard is reached, and meanwhile harmless recycling is truly realized.

The invention relates to a method for treating the cyaniding gold extraction waste liquid to recover gold, silver and copper by use of acid making waste gas, belonging to the technical field of gold smelting, waste gas treatment of chemical industry and environmental protection. The method for treating the cyaniding gold extraction waste liquid to recover gold, silver and copper by use of acid making waste gas provided by the invention comprises the following steps: roasting a sulfur-containing mineral; making acid to generate acid making tail gas; roasting gold concentrate or gold-containing sulfide mineral, and performing roasted sand cyaniding gold extraction to generate cyaniding gold extraction waste liquid; and treating the cyaniding gold extraction waste liquid by use of the acid making tail gas. The method provided by the invention makes use of smoke acid making tail gas and cyaniding gold extraction waste liquid, the valuable elements gold, silver and copper in the cyaniding gold extraction waste liquid are recovered after acid-base neutralization precipitation, and the pollution of the surrounding environment caused by the cyanogen-containing sewage is eliminated; moreover, after being treated, the cyaniding gold extraction waste liquid returns to the system for recycling, thereby improving the comprehensive utilization of resources.

The invention relates to a nano-cuprous oxide fungicide composite subjected to in-situ reduction of lignin. The nano-cuprous oxide fungicide composite is prepared by mixing 10 to 40 parts of nano-cuprous oxide powder, 0.1 to 15 parts of surfactants, 5 to 30 parts of dispersants, and 30 to 70 parts of water, and grinding the mixture for 1 to 4 hours. As lignin, which is a natural high-molecular polymer, is taken as a reducing agent, and covers cuprous oxide to serve as a protecting agent, the prepared cuprous oxide product can be mixed with different surfactants and different dispersants according to different proportions, and the mixture is ground to obtain a suspending agent-type product. As no other poisonous reagent is added during the preparation process, the preparation method is simple, convenient and environmentally friendly, and the prepared product has an excellent sterilizing effect, so that the application prospect in the fields of agriculture, medicine and the like is wide..

The invention provides a method for realizing carbon dioxide cycle power generation based on waste heat from a cement plant. According to the method, CO2 captured during emission reduction is used as a working medium and is cooled and compressed into liquid CO2, the low-pressure liquid CO2 fluid is conveyed into different CO2 energy storage devices through high-pressure pumping devices with the extremely-low energy consumption, various waste heat generated in the cement production process is used as the energy for energy storage of the low-pressure liquid CO2 fluid, and high-pressure thermal supercritical CO2 fluid with the fluctuations and/or different temperatures and different heat densities is generated and is tempered and changed into isothermal-isobaric supercritical CO2 fluid through a steady flow regulator to be stably supplied to a turbine/piston expander so that the turbine/piston expander can do work to drive an electric generator to generate electricity; and carbon dioxide cycle power generation is realized, efficient heat recycling can be achieved, the high heat efficiency is achieved, surplus energy is stored and used effectively, and flexible adjustment and utilization of the energy are achieved.

The invention discloses a low-free-TDI (toluene diisocyanate) polyurethane polyester curing agent and a preparation method thereof. The invention aims to provide a low-free-TDI polyurethane polyester resin curing agent with better film forming property and lower environmental pollution hazards, of which the free TDI content is less than 0.15% after paint preparation, and a preparation method thereof. The curing agent is composed of the following components in percentage by weight: 12.5-16.5% of polyester resin, 3.5-5.5% of polyalcohol, 20-25% of TDI, 0.3-0.7% of antioxidant, 0.2-0.6% of dehydrating agent, 0.05-0.15% of polymerization inhibitor, 0.15-0.45% of trimer catalyst and 58-65% of solvent, totaling 100%. The polyester resin is composed of 6-10% of bean oil acid, 15-19% of castor oil, 19-23% of rosin, 15-18% of phthalic anhydride, 15-18% of glycerol, 0.25-0.65% of antioxidant and 16-20% of xylene, totaling 100%.

The invention discloses a method for detecting the content of ferric oxide in silicon carbide. The method comprises the following steps: A, preparing a to-be-detected solution; and B, building a standard working curve by a ferric standard solution, testing the to-be-detected solution obtained in the step A to obtain the concentration of ferric ions in a filtrate, and calculating to obtain the content of Fe2O3 in the silicon carbide. The method for detecting the content of the ferric oxide in the silicon carbide is different from a conventional silicon carbide sample melting method and a method for detecting Fe2O3 in the silicon carbide by virtue of an inductively coupled plasma emission spectrometer (ICP-OES); hydrochloric acid, HF acid and ammonia water do not need to be used for treating samples in the early stage; a platinum vessel does not need to be used for preparing the samples; the sample preparing time is greatly reduced; the acid damage and the risk that a platinum crucible is carbonized and reduced can be avoided; the environmental pollution damage is greatly reduced; in addition, high-purity SiO2 auxiliary products are obtained; the value of the method for detecting the content of the ferric oxide in the silicon carbide is greatly improved.

The invention provides a device system utilizing cement plant waste heat for achieving carbon dioxide cyclic power generation. The device comprises a liquid CO2 storage tank, a high-pressure pumping device, a CO2 energy storage device, a flow stabilizer, a turbine/piston expander, a power generator, a cooling device and a compression device. The CO2 energy storage device is used for making low-pressure liquid CO2 fluid pumped out of the liquid CO2 storage tank directly absorb abandoned waste heat or high-temperature heat energy which is different in temperature and is produced by a cement production line for energy storage, and the low-pressure liquid CO2 fluid is converted into supercritical CO2 fluid different in temperature, pressure and energy density. The flow stabilizer is used for converting the supercritical CO2 fluid different in temperature, pressure and energy density into equal-pressure supercritical CO2 fluid. According to the device system, captured carbon dioxide serves as a working medium, various kinds of abandoned waste heat which is generated in the cement production process and is large in temperature fluctuation and temperature difference is utilized as main energy to achieve carbon dioxide cyclic power generation, and energy consumption is low.

The invention provides a process for preparing carboxymethyl chitosan which comprises, using chitosan as raw material, 95% of ethanol as medium, immersing into low concentration alkali in one time, keeping constant temperature at 80-95 deg. C, stirring and reversing flow for 1.5-3.0 hrs, charing monochloroacetic acid in 3-7 times, stiring 2-20h at 40-50 deg. C and reversing flow 2-4h, washing, depositing and drying. The preferred weight proportion range of the chitosan, alkali, monochloroacetic acid and ethanol is 1 : 2.5-3.5 : 2-4 : 16-20. The prepared nano nano film has good effect.

The invention provides a high-air-tightness pipe fitting applied to an exhaust gas treatment air duct system. The high-air-tightness pipe fitting comprises an air duct and a joint used for being connected with the air duct, and is characterized in that the air duct comprises an outer duct layer and an inner duct layer, a hollow layer is arranged between the outer duct layer and the inner duct layer, a plurality of connecting ribs are arranged between the outer duct layer and the inner duct layer, the joint comprises an inner connecting layer and an outer connecting layer, a plurality of connecting ribs are arranged between the inner connecting layer and the outer connecting layer, a hollow channel is formed among the connecting ribs, the inner connecting layer and the outer connecting layer, first internal threads and second external threads are symmetrically arranged at the two ends of each of the internal connecting layer and the external connecting layer correspondingly, the end ofthe inner duct layer of the air duct is provided with first external threads matched with the first internal threads, and the end of the outer duct layer of the air duct is provided with second internal threads matched with the second external threads. According to the high-air-tightness pipe fitting, through the hollow layer structure cooperative design based on the air duct and the joint, the high-air-tightness effect of the pipe fitting is achieved, poisonous and harmful gas leakage is reduced, the pollution hazard to the atmosphere and the workers is reduced, the noise reduction effect isimproved, and the comfort degree of the exhaust gas treatment working environment is improved.

The invention discloses a method for synthesizing ethyl 3-nbutyl amino propionate. According to the method, n-butylamine and ethyl acrylate are selected as raw materials, cerous nitrate is selected as a catalyst, and ethyl 3-nbutyl amino propionate is prepared by a reaction. Compared with the prior art, the method has the characteristics that the reaction operation is convenient, and the reaction conditions are mild; the cerous nitrate catalyst has the advantages of low cost, easiness for obtaining, good solubility in organic solvents and small toxicity, so that the cerous nitrate catalyst is an environment-friendly catalyst; on one hand, the cerous nitrate catalyst increases the product yield and reduces the reaction time on the condition of ensuring the purity so as to improve the production efficiency and reduce the production cost; on the other hand, the cerous nitrate catalyst can be applied in industrial production in large quantity to reduce the environmental pollution damage of additional reaction products.

The invention relates to a fully-integrated nucleic acid detection microfluidic chip and a use method thereof. The fully-integrated nucleic acid detection microfluidic chip comprises a cover plate, a substrate, a bottom plate, a sample box and bubble caps, wherein the cover plate and the bottom plate are respectively stuck to two sides of the substrate; the substrate is provided with a sample outlet, a channel, a sample box groove, at least one bubble cap groove and at least one reaction tank, wherein the channel is communicated with the sample box groove, all the bubble cap grooves and all the reaction tanks, and all the reaction tanks are respectively connected with the sample outlet; the sample box is arranged on the sample box groove; the sample box groove is connected with the at least one reaction tank; the bubble caps are arranged on the bubble cap grooves; the bubble caps are internally filled with a reagent; the bubble cap grooves are respectively connected with the sample box groove and the at least one reaction tank. The invention also provides the use method of the fully-integrated nucleic acid detection microfluidic chip. The fully-integrated nucleic acid detection microfluidic chip can be used for treating a complex sample in an integrated way, and is good in airtight property and simple in structure.

The invention discloses a method for improving the treatment efficiency of hermetia illucens on cow manure by using peanut powder and belongs to the technical field of resources and environmental protection. The method comprises the following steps: placing fresh cow dung in an oven to be treated for 4h at the temperature of 75 DEG C, adding a certain amount of the peanut powder to prepare a mixture of the cow dung, inoculating hermetia illucens larvae after fermenting, controlling the temperature at 28 to 30 DEG C, and performing treatment for 15 to 18 days. The method disclosed by the invention is simple to operate and low in cost, can improve the degradation efficiency of the hermetia illucens on the cow dung, and has broad development prospects.

The invention relates to a nutrition reinforced health care type premixing material for preventing and treating sow foot cracking diseases. Per kilogram of nutrition reinforced health care premixing material is prepared from the following ingredients including 300 to 350g of bovine spinal cord peptone, 150 to 200g of oat, 20 to 40g of brown sugar, 100 to 150g of emulsified fish oil-lard compounds, 10 to 30g of seaweed meal, 33.8 to 36.3g of composite vitamin, 39 to 65g of composite organic trace elements, 15 to 25g of chitosan oligosaccharide, 5g of poria cocos-radix astragali seu hedysari-dwarf lilyturf roots- rhizoma polygonati odorati extracts and the balance fermented bean meal. The nutrition reinforced health care premixing material is uniformly mixed into daily ration of sow generating foot cracking diseases. The nutrition reinforced health care type premixing material for preventing and treating sow foot cracking diseases has the advantages that by aiming at the disease mechanism of the diseases, the regulation is performed on the sow physique in the nutrition aspect; the immunological competence and the wound healing capability of the sows can be fundamentally regulated, so that the problem of sow foot cracking is solved; the effect is much better than that of the zinc supplementation and antibiotic use. The irregular metabolism of the sows with crack feet can be regulated to the normal state by using the health care type premixing material utilizing the technical scheme; the reoccurrence cannot easily occur in the later period.

The invention provides a cordyceps sinensis host hepialus armoricanus larva generation cyclic breeding method. The method includes the steps of natural growing pupa excavating introduction, larva forming, copulation, spawning, incubation, larva breeding, pupa introduction, larva forming, copulation, spawning and larva breeding generation circulation. Soil of a larva pupa chamber is prepared from,by weight, 40% of hepialus armoricanus origin place frozen earth, 20% of vegetable garden soil, 26% of high mountain humus, 10% of decayed grass roots, 3% of lime and 1% of fungus medicine, the pH value of the soil ranges from 5.5 to 6, and the water content is 40%. According to the cordyceps sinensis host hepialus armoricanus larva generation cyclic breeding method, natural wild pupae and moths are adopted as a first generation of pupae and moths for generation cyclic breeding, following next generations can be cyclically transformed with artificially bred larvae, pupa or moths do not need tobe caught in fields, and people can directly breed larvae for achieving generation cyclic breeding. The fungus medicine for resisting viruses and killing bacteria, fungi and pests is added into the soil of a pupa chamber and the larva pupa chamber, so that harm caused by the viruses, the fungi and pollution is reduced, and the yield is increased.

The invention discloses a wall body coating composition and relates to the technical field of coatings. The wall body coating composition consists of the following raw materials: a styrene-acrylic emulsion, a vinyl-vinyl acetate copolymer, plasma-modified carbon fibers, niobium and yttrium ore powder, porous basalt, chlorite, expanded graphite, Wudalianchi volcanic gray matters, ITO powder, acetyltrioctyl citrate, diacetone acrylamide, cyclohexanol, magnetized water, a dispersing agent, a foaming agent, a surface film forming agent, a cross-linking agent and a coupling agent. The wall body coating composition disclosed by the invention is simple to prepare, green and environmentally-friendly, has excellent durability and functionality and solves the problem of environmental pollution caused by electromagnetic wave energy transfer and radiation to a certain extent, thereby greatly reducing the interference damage of electromagnetic waves to surrounding equipment and a human body.

The invention discloses a composite buffering agent for acidification in oil exploitation of a low-permeability oilfield. The buffering agent comprises a plant corrosion inhibitor component A, a plant corrosion inhibitor component B, a modified Mannich base corrosion inhibitor, a corrosion inhibitor synergist and an organic solvent; the raw materials of the plant buffering agent component A are fresh tea seed shells and walnut green husks; the raw material of the plant buffering agent component B is bagasse; the extraction of the plant buffering agent component B comprise S1, bagasse lignin extraction, S2, diethyl ether purification and grading bagasse alkali lignin extraction, S3, methanol purification and grading bagasse alkali lignin extraction, and S4, amination modified bagasse alkali lignin extraction. The composite buffer agent has an excellent corrosion inhibition effect, and the extract of natural green plants is used as one of main components of a slow release agent, so that the components of harmful chemicals in the corrosion inhibitor are reduced, and the corrosion inhibitor is more efficient, has smaller environmental pollution and has certain application value and development potential.

The invention discloses a method for preparing coal mine residual mining area filling paste from red mud. The method includes the steps that on the basis of testing the water content, particle diameter, permeability coefficient and expansion coefficient of the red mud, superfine powder for preparing the coal mine residual mining area filling paste is obtained through ball milling, coal gangue is broken and screened, and crude aggregate and fine aggregate for preparing the coal mine residual mining area filling paste are obtained; finally, the superfine powder solution is neutralized and matched with water, a water reducer, an early strength agent, an expanding agent and a retarder, the materials are mixed to be uniform, and the coal mine residual mining area filling paste is prepared. The problem that the source range of residual mining area paste filling materials is narrow is solved, occurrence of dynamic disasters of a residual mining area can be scientifically prevented and controlled, sustainable development is guaranteed, the widely-accumulated red mud is reasonably and efficiently utilized, and the pollution hazard to the surrounding is relieved.