25results about How to "Avoid environmental risks" patented technology

This invention provides a method for recovering and utilizing distillation residue after solvent removal from homohydric anhydride, relating to the field of fine chemical technology. The method includes anhydride treatment, vaporization and sublimation, dissolution and recrystallization, distillation, and water washing. In this invention, the distillation residue is anhydride-treated under high temperature and negative pressure, followed by vaporization and sublimation under vacuum to separate mechanical impurities and high-boiling substances. Then, through dissolution and recrystallization, the difference in solubility between homohydric anhydride and metahydric anhydride in polar solvents is utilized to preferentially crystallize out the homohydric anhydride. The mother liquor is distilled to remove the solvent, and then colored impurities are removed by hot water washing and activated carbon adsorption. Finally, it is cooled and crystallized to obtain trimellitic acid. The homohydric anhydride obtained by this invention has a purity ≥95% and a yield of 84-89%, and the trimellitic acid has a purity ≥97% and a yield of 81-86%. This method achieves effective recovery of high-value-added components from distillation residue, demonstrating significant economic and environmental benefits and promising application prospects.

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

The application discloses a heat pump all-in-one machine and system convenient to disassemble and assemble, relates to the technical field of heat pump hot water equipment, and comprises a whole machine frame, a water storage tank, a main machine frame which is detachably connected with the whole machine frame, and a heat pump main machine which is installed in the main machine frame. The application sets the detachable main machine frame in the whole machine frame, integrally installs the complete heat pump main machine (containing a compressor, a heat exchanger and all heat conversion components such as related pipelines) on the main machine frame, and makes the heat pump main machine and the water storage tank form a module which is relatively independent in space and structure. When the equipment needs to be overhauled, maintained or replaced, the main machine frame can be integrally drawn out together with the heat pump main machine, so that the disassembly and assembly difficulty is remarkably reduced; meanwhile, the heat pump main machine pipeline has completed pre-assembly and sealing inside the main machine frame, is connected with the water storage tank only through a small amount of water pipe interfaces, can keep the refrigerant circuit intact after being disconnected, and avoids energy efficiency loss and environmental protection risks caused by on-site discharge and re-charging of refrigerant.

The utility model provides a full -automatic cotton seed sulfuric acid de -cotton acid -matching device, include: raw material storage unit, mixed dilution unit, finished product standby unit and waste acid treatment unit. The utility model provides a full -automatic cotton seed sulfuric acid de -cotton acid -matching device, through raw material temporary storage measures the conveying mixes dilution finished product standby waste acid treatment five big links cooperation, the core is through accurate control material proportion and mixing process, realizes safe, efficient concentrated sulfuric acid dilution, and this system whole presents concentrated sulfuric acid from storage, measurement, dilution to finished product conveying and waste acid treatment closed -loop process, the core lies in accurate proportioning, safe mixing, environmental protection treatment, through PLC or DCS control system linkage pump, valve and instrument, can realize automatic operation, ensure the dual goal of production efficiency and safety environmental protection, the actual operation emphatically controls dilution temperature, material flow and waste acid index, avoids safety accident and environmental risk.

This invention relates to a method and system for precise ammonia injection control in a circulating fluidized bed boiler, comprising the following steps: S1, acquiring the flue gas temperature, flue gas velocity, and NOx concentration at each measuring point at the cyclone outlet, and calculating the average NOx concentration, average flue gas velocity, and average flue gas temperature; S2, based on the calculation results of S1, calculating the total amount of ammonia injected as a reducing agent, forming pre-feedback, and adjusting the total amount of reducing agent passing through the ammonia injection main valve; S3, acquiring the NOx concentration, flue gas temperature, and flue gas velocity at each spray gun, calculating the reducing agent dosage at each measuring point, forming post-feedback, and adjusting the reducing agent dosage passing through the ammonia injection branch valve on the branch where the spray gun is located at each measuring point; this method, by measuring the flue gas temperature, flue gas velocity, and NOx concentration at each measuring point at the cyclone outlet and at each spray gun, calculates the total amount of ammonia injected as a reducing agent and the amount of reducing agent used in each branch in real time, thereby adjusting the reducing agent dosage of the ammonia injection main valve and the ammonia injection branch valves of each branch, and achieving precise ammonia injection adjustment in real time.

The application relates to the technical field of sodium hypochlorite production and preparation, and particularly discloses a device for continuously preparing high-purity sodium hypochlorite, which comprises a first reaction kettle, a first water inlet pipe is connected with a water inlet of the first reaction kettle, and a first conveying pump is arranged on the first water inlet pipe; a first back pressure valve is arranged on the first water inlet pipe between the first conveying pump and the first reaction kettle; a first jacketed heat exchanger is sleeved on the outer circumferential surface of the first reaction kettle, a first jacketed heat exchanger inlet and a first jacketed heat exchanger outlet are arranged on the first jacketed heat exchanger, the first jacketed heat exchanger inlet is connected with a drain outlet of the first reaction kettle through a pipeline, the first jacketed heat exchanger inlet is connected with cooling water through a pipeline, and a second back pressure valve is arranged on the pipeline between the cooling water and the first jacketed heat exchanger inlet. The application has the characteristics of being capable of reducing by-products, improving the effective content and reducing the waste of raw material chlorine.

The invention discloses a method for preparing sodium fluoride by recycling overhaul slag, and belongs to the technical field of dangerous solid waste recycling. The method for preparing the sodium fluoride by recycling the overhaul slag comprises the following steps: (1) crushing the overhaul slag, grinding and roasting the overhaul slag and calcium carbonate, then leaching by using a first leaching solution, and carrying out suction filtration to obtain a first filtrate and a first filter residue; (2) leaching the first filter residue with a second leachate, carrying out suction filtration, and taking a second filter residue; (3) leaching the second filter residue with a third leachate, and carrying out suction filtration to obtain a second filtrate; (4) combining the first filtrate and the second filtrate, and adding an impurity removal agent to remove impurities, so as to obtain a purified sodium fluoride solution; (5) concentrating the purified sodium fluoride solution, and inducing crystallization to obtain a sodium fluoride crude product; (6) purifying the sodium fluoride crude product with hot pure water to obtain purified sodium fluoride crystals; and (7) drying the purified sodium fluoride crystal to obtain sodium fluoride.

The invention provides an electric power equipment intelligent green recovery method and system based on material attribute characteristics, and the method comprises the steps: carrying out the preprocessing of the attribute characteristics of to-be-recovered electric power equipment, so as to correct the distortion characteristics under the environment interference, and complement the characteristic parameters of the lack of novel materials; distributing a dynamic weight for each attribute index in the attribute index system through a dynamic weight distribution algorithm, and calculating a comprehensive score of the power equipment through a weighted summation calculation mode; determining an initial recommendation recovery scheme according to the comprehensive score; and calculating a green recovery index of the power equipment, evaluating whether the power equipment meets a green recovery requirement through the green recovery index, and adjusting the initial recommended recovery scheme according to an evaluation result. According to the method, accurate classification of high-difficulty recovery materials and adaptive recovery scheme recommendation are realized through multi-stage operation processing of attribute feature preprocessing, feature weighted fusion and green evaluation.

The invention discloses an oil sludge pyrolysis catalyst and a preparation method thereof, and belongs to the technical field of oily sludge treatment. The preparation method comprises the following steps: (1) pretreating coal coke to obtain modified coal coke; the pretreatment comprises the following steps: firstly, treating the coal coke by using organic acid, and then treating the coal coke treated by the organic acid by using alkali liquor; and (2) mixing the modified coal coke with ferric salt, and then sequentially carrying out solid-liquid separation, drying, calcining and reduction treatment to obtain the oil sludge pyrolysis catalyst. The coal coke is modified in an acid-base sequence, pore channels are opened and functional groups are increased through organic acid treatment, the pore channels are widened and heavy metal impurities are removed through alkali treatment, and the pore structure of the carrier is synergistically improved; then an iron active component is loaded, and the catalytic activity is improved through calcination and hydrogen reduction activation. When the prepared catalyst is used for oil sludge pyrolysis, the oil recovery rate can reach 94% or above, the preparation process is environmentally friendly, and resource utilization of oil sludge is achieved.

The invention relates to the technical field of BHET recycling, and discloses a method for preparing antimony-free cation dyeable polyester fibers by adopting recycled BHET, and the method comprises the following steps: S1, adding a titanium catalyst and titanium dioxide ethylene glycol mixed slurry into the recycled BHET, and carrying out pre-polycondensation reaction to prepare a mixture I; s2, adding a branched chain agent, a stabilizer and sulfonate into the other part of recovered BHET, and carrying out pre-polycondensation reaction to prepare a mixture II; and S3, mixing the mixture I and the mixture II, carrying out two-stage polycondensation reaction, and carrying out melt spinning to obtain the polyester fiber. Through combination of a parallel pre-polycondensation production process and an antimony-free catalytic system, the problem of polymerization instability caused by purity fluctuation of recovered BHET and impurity residues is solved, efficient compatibility of recovered raw materials and a CDP functional system is realized, and the industrialization process of regenerated extinction CDP is promoted.

The invention relates to the technical field of auxiliary materials for optical cables, and discloses green and environment-friendly optical cable filling paste for optical cables and a preparation method of the green and environment-friendly optical cable filling paste. The filling paste is prepared by compounding plant base oil compounded by flaxseed oil and castor oil as base oil with environment-friendly components such as modified organic bentonite, environment-friendly polyolefin wax and modified nano silicon dioxide according to a specific proportion; the preparation method comprises the steps of organic bentonite modification, base oil pretreatment, segmented temperature control premixing, functional component reaction, homogeneous degassing post-treatment and the like. The filling paste disclosed by the invention is environment-friendly, non-toxic and high in biodegradation rate, and has excellent water resistance, moisture resistance, stability and thixotropy; the preparation process adapts to the characteristics of plant-based raw materials, can ensure that all the components are fully fused, improves the comprehensive performance of the filling paste, is simple and easy to industrialize, solves the problems of poor environmental protection property and insufficient stability of the existing optical cable filling paste, and has important popularization and application values.

The invention relates to the technical field of hazardous waste water treatment, in particular to a treatment system and method for medical hazardous waste incineration fly ash landfill leachate. The treatment system for the medical hazardous waste incineration fly ash landfill leachate comprises an integrated softening microfiltration unit, an anti-pollution high-recovery-rate membrane concentration unit, a submerged combustion evaporative crystallization unit based on an in-plant combustible gas source and an in-plant material co-treatment unit which are connected in sequence. The method comprises the following steps: synchronously removing hardness and heavy metals through intelligent dosing softening and microfiltration; a two-stage DTRO membrane is used for realizing deep desalination of the high-salinity wastewater and enrichment of pollutants; carrying out efficient evaporation and crystallization on the concentrated solution by adopting an immersion combustion evaporation technology; and finally, generated sludge, crystalline salt and residues are returned to the incinerator for co-treatment, and condensate water is recycled. Aiming at the characteristics of high salinity, high hardness, high toxicity and low biodegradability of the percolate, the invention provides a set of complete near-zero emission solution, and efficient removal and recycling of pollutants are realized.

The embodiment of the present application relates to the technical field of soil remediation, in particular to a soil remediation system based on desulfurization gypsum and microorganisms, comprising: a desulfurization gypsum treatment assembly, which is used for preparing desulfurization gypsum powder and desulfurization gypsum slurry by taking desulfurization gypsum generated by a coal-fired power plant as raw material; a mineralization bacteria preparation assembly, which is used for obtaining desulfurization gypsum source functional mineralization bacteria liquid by taking desulfurization gypsum powder as an initial bacteria source; a soil plowing assembly, which is used for plowing the soil to be remediated after a spraying assembly applies desulfurization gypsum slurry to the soil to be remediated, so that the soil to be remediated is uniformly mixed with the desulfurization gypsum slurry to obtain pre-improved soil; and the pre-improved soil to which a remediation reaction liquid is applied is plowed to precipitate target heavy metal ions in the pre-improved soil. The technical scheme of the present application can improve the remediation effect of saline-alkali and heavy metal contaminated soil, and avoid the environmental risk caused by the storage of desulfurization gypsum.

The embodiment of the invention relates to the technical field of soil remediation, in particular to a soil remediation method based on synergy of desulfurized gypsum and microorganisms, which comprises the following steps: respectively preparing desulfurized gypsum powder and desulfurized gypsum slurry by taking desulfurized gypsum generated by a coal-fired power plant as a raw material; the method comprises the following steps: inoculating desulfurized gypsum powder as an initial bacterium source into an enrichment culture medium for enrichment culture and passage domestication to obtain a desulfurized gypsum source functional mineralized bacterium solution, and taking urea as a nitrogen source in the enrichment culture medium; applying the desulfurized gypsum slurry to soil to be remediated, uniformly mixing, and standing for a preset time period to obtain pre-improved soil; and mixing the desulfurized gypsum source functional mineralized bacteria solution with a urea solution to obtain a remediation reaction solution, and applying the remediation reaction solution to the pre-improved soil to precipitate target heavy metal ions in the pre-improved soil so as to realize remediation of the pre-improved soil. According to the technical scheme, the remediation effect of the salinized and heavy metal contaminated soil can be improved, and the environmental risk caused by stockpiling of desulfurized gypsum is avoided.

The application belongs to the technical field of high polymer materials, and discloses a fluorine-free high and low temperature resistant organic silicon modified polyurethane elastomer as well as a preparation method and application thereof. The elastomer is prepared from an organic silicon modified polyurethane base and a peroxide compound solution, the mass of the peroxide compound solution is 1-5% of the mass of the organic silicon modified polyurethane base; the preparation raw materials of the organic silicon modified polyurethane base include 4,4'-dicyclohexyl methane diisocyanate, hydroxyl-terminated polybutadiene, monohydroxy polydimethylsiloxane, N1-(3-aminopropyl)-N1-dodecylpropane-1,3-diamine and 3-glycidyl ether oxypropyl triethoxysilane; the peroxide compound solution is prepared by dissolving benzoyl peroxide and dicumyl peroxide with a mass ratio of 1:0.5-1:2 in an organic solvent, stirring at room temperature until completely dissolved, and then preparing a homogeneous peroxide solution with a mass fraction of 5-20%.

The utility model discloses a kind of methanol washing device waste heat recovery systems, including methanol water washing tower, separation tower cooler, separation column reflux tank, first reboiler, hot regenerator, hot regenerator cooler, hot regenerator column reflux tank, second reboiler, heat exchanger and water washing tower;The top outlet of methanol water washing tower is also communicated with the liquid inlet of hot regenerator by pipeline;The gas phase outlet of hot regenerator column reflux tank is communicated with the heat medium inlet of heat exchanger by pipeline, the heat medium outlet of heat exchanger is communicated with the bottom air inlet of water washing tower by pipeline, and the top exhaust port of water washing tower is communicated with the air inlet of flare by pipeline.The advantage is that: the efficient compact waste heat recovery system proposed in the utility model, by optimizing heat medium circulation, realize the step-by-step utilization of low-temperature heat energy, finally reduce steam consumption, provide key technical support for industry green low-carbon transformation.

The present application relates to the technical field of waste lithium battery recycling, and discloses a method for preparing high-purity black powder from waste lithium batteries through low-temperature disassembly and a waste gas treatment process, wherein aluminum, organic matter and black powder are separated through step-by-step treatment to obtain high-purity battery black powder; fluorine and phosphorus are preferentially removed at low temperature, strong alkali is not used to avoid the competitive reaction of hydroxyl ions with carbonates and carbon dioxide, and subsequent equipment corrosion is prevented. First-stage water washing simultaneously realizes water-soluble organic matter absorption, phosphorus pentafluoride decomposition, phosphoric acid absorption and pH reduction to inhibit hydrogen fluoride absorption, and no aluminum ions are generated to form aluminum phosphate precipitates, so that a packed tower can be used; second-stage aluminum salt solution absorbs hydrogen fluoride under acidic conditions to form a dissolved fluorine-aluminum complex, which is not affected by carbon dioxide, and a packed tower can be used. The fluorine-aluminum complex solution can be processed into cryolite to realize fluorine resource recycling and avoid environmental risks.

The invention discloses a zinc-based flow battery electrolyte and application thereof, and belongs to the technical field of electrochemical energy storage. The electrolyte is an aqueous solution containing a zinc salt and an additive, and the additive comprises a calcium salt and a magnesium salt; the additive also comprises one or more of lithium salt, sodium salt and strontium salt. Wherein Ca < 2 + > and Mg < 2 + > can strongly interact with water molecules, and a hydrogen bond network in the electrolyte is effectively weakened, so that the freezing point is remarkably reduced; and a small amount of other added metal cations generate a synergistic effect with Ca < 2 + > and Mg < 2 + >, so that the electrolyte still keeps excellent electrochemical properties such as high ionic conductivity and the like while obtaining an ultra-low freezing point. On the basis, the electrolyte successfully realizes stable circulation of the zinc-iodine flow battery in an extremely low-temperature environment. The electrolyte is low in cost, safe and environment-friendly, and a reliable technical scheme is provided for widening the application scene of the zinc-based flow battery to the extreme low-temperature field.

The application provides a methanol control method for a marine methanol engine. The method predicts the risk of methanol leakage by analyzing the methanol escape route and gives a prediction control scheme to solve the leakage safety problem of the methanol engine in the actual working process, ensure the stable and reliable work of the methanol engine at the best, and improve the thermal efficiency. The method comprises the following steps: obtaining engine state information, methanol injection amount change trend state, engine speed difference information and engine torque difference information; comprehensively determining the engine state information, the methanol injection amount change trend state, the engine speed difference information and the engine torque difference information, and outputting the engine methanol supply state; the engine methanol supply state comprises methanol no escape, methanol imminent escape and methanol serious escape; and the methanol injection amount is subjected to feedforward control according to the engine methanol supply state.

The application discloses a kind of nanometer spray plating process of motorcycle hub, comprising the following steps: S1 substrate pretreatment: to aluminum alloy motorcycle hub is sequentially carried out oil removal cleaning, mechanical polishing, phosphating, remove surface dirt, oxide layer and impurities, obtain clean pretreatment hub;S2 primer spraying and solidification: on the surface of pretreatment hub, spray epoxy modified acrylic primer, control primer dry film thickness is 15-30 μm, after spraying, solidification treatment is carried out, obtain primer solidification hub;S3 sensitization and activation treatment: to primer solidification hub is sequentially carried out sensitization treatment, activation treatment, after treatment, using ultrapure water flush clean, obtain activated hub;S4 nanometer mirror surface spray plating: using double-end spray gun, A agent metal salt solution and B agent reducing agent solution are synchronously sprayed, A agent metal salt solution and B agent reducing agent solution are mixed at 15-25 cm from the surface of hub, and metal crystal layer is deposited on the surface of hub.

This invention discloses a method for activating persulfate to degrade organic pollutants using an iron / smarium co-modified porous nitrogen-doped carbon Fenton catalyst. The method uses the iron / smarium co-modified porous nitrogen-doped carbon Fenton catalyst as an activator to activate persulfate and degrade organic pollutants. The iron / smarium co-modified porous nitrogen-doped carbon Fenton catalyst comprises a porous nitrogen-doped carbon framework, with iron and samarium elements modified internally and on its surface. Iron and samarium elements coexist in the form of single-atom sites, diatomic sites, atomic clusters, and nanoparticles. The iron / smarium co-modified porous nitrogen-doped carbon Fenton catalyst used in this invention has the characteristics of high reactivity, wide applicability, and strong anti-interference ability. It is a catalyst with excellent Fenton-like catalytic performance and can be widely used to treat organic pollutants in water bodies. It can quickly and thoroughly remove organic pollutants, has high application value, and good application prospects.

The application discloses a tunnel gushing wastewater resourceization irrigation method and system based on water and fertilizer integration, relates to the field of ecological irrigation, and enters water and fertilizer requirement parameters of corresponding vegetation according to adaptive vegetation types, calculates fertilizer supplement amount in combination with fertilizer content data of purified gushing water, uniformly mixes water-soluble fertilizer and the purified gushing water by an intelligent fertilizer distribution system, and forms a water and fertilizer mixture; for different vegetation type regions, corresponding irrigation modes are deployed; an ecological restoration region adopts drip irrigation combined with infiltration irrigation, an agricultural region adopts drip irrigation under a film, an economic forest region adopts micro-sprinkling irrigation, and the water and fertilizer mixture is delivered according to a set irrigation frequency and dosage. The application achieves the irrigation water quality standard of the tunnel gushing wastewater through sand setting, coagulation sedimentation, targeted heavy metal removal and salt reduction treatment, replaces traditional underground water or surface water irrigation, relieves water resource pressure in drought and water shortage regions, and avoids environmental risks of direct discharge of gushing water.

This invention discloses a method for preparing a cobalt-free black glaze for heat-resistant cookware and its decorative product. The method includes the following steps: First, raw materials are weighed according to the following mass percentages: cuprous oxide 21-39%, alumina 13-29%, silicon dioxide 32-65%, iron oxide 0.6-3.0%, and manganese oxide 0.3-2.0%. After being mixed evenly, the mixture is placed in a crucible and melted at high temperature. The melt is then water-quenched to obtain a black glass frit. Next, the black glass frit is dried, pulverized, and sieved to obtain black glass powder. Then, the black glass powder is mixed with water at a mass percentage of 100%:50-65%, and kaolin and a suspending agent or dispersant are added. The mixture is ball-milled evenly to prepare the glaze. The glaze obtained in step three is applied to the surface of a bisque-fired spodumene-based heat-resistant cookware blank. After drying, it is fired at 1210-1260℃ for 0.5-3 hours to obtain a black glaze layer. This invention has a simple process, low cost, and can be mass-produced, with broad application prospects.

The invention relates to a coal mine bio-based steel wire rope core flame-retardant conveyor belt and a manufacturing method thereof, and belongs to the technical field of conveyor belts, a core matrix adopts a blending system of bio-based polyamide elastomer and bio-based chlorosulfonated polyethylene, is derived from renewable resources, significantly reduces the carbon footprint of a product, and adopts a halogen-free flame-retardant system, so that the production cost is reduced. The environment and health risks of a halogen flame retardant are avoided, the high hydrogen bond density of the bio-based polyamide elastomer and the high polarity of the bio-based chlorosulfonated polyethylene form a synergy, and a special bonding formula of the m-methylene white system and the cobalt salt bonding accelerant is matched, so that the initial bonding strength and the bonding strength after thermal aging of the steel wire rope are enhanced, and the service life of the steel wire rope is prolonged. The problems that a steel wire rope is easily pulled out and layered in the later period of a traditional conveying belt are solved, the mechanical properties such as tensile strength and elongation at break of the covering rubber layer are superior to those of standard requirements, and heavy load impact and repeated flexing under the working conditions of long distance, large transportation volume and high speed of a coal mine can be borne.