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

The application provides a photoresist waste liquid recycling device and process, by adding hydrochloric acid to the photoresist waste liquid in the acidification precipitation tank in the pretreatment module to adjust the pH value, the linear phenolic resin precipitation rate reaches more than 95%, and the linear phenolic resin can be used again to the production stage of the photoresist after centrifugal separation, a compound coagulant containing sulfide and polyaluminum chloride is added to the heavy metal capture tank in the pretreatment module, and the removal rate of heavy metal ions reaches 99.5%; then the photoresist fragments are separated by using an ultrafiltration device, and the diatomite modified by NaOH and polyetherimide is used for adsorption and decolorization, then two-stage vacuum distillation process is used to realize the recovery of high-purity solvents in the photoresist waste liquid, finally, the remaining residue is polymerized and cured by ultraviolet radiation, and the solid fuel with high heat value can also be prepared, so that the 'zero emission' and resource full recovery of the photoresist waste liquid are realized, and the treatment cost and environmental risk are significantly reduced.

This invention discloses a resource recovery system for dredged sediment treatment based on ultrasonic extraction and flotation synergy, comprising: a pretreatment unit, a first-stage ultrasonic extraction reaction unit, a second-stage solid-phase adsorption reaction unit, a third-stage flotation separation unit, a dewatering unit, a residual water treatment unit, and a nitrogen and phosphorus recovery unit. It also discloses a resource recovery method for dredged sediment treatment based on ultrasonic extraction and flotation synergy. This invention solves the problems of low pollutant removal rate, high risk of secondary pollution of dredged soil, and limited resource recovery in traditional dredged sediment treatment. Through the synergistic effect of multiple units including "ultrasonic-liquid-solid-phase adsorption-micro-nano bubble flotation," it achieves efficient release of nitrogen and phosphorus, simultaneous removal of microplastics, rapid separation of clean sediment from polluted phases, and recovery of nitrogen and phosphorus for fertilizer production and resource recovery of clean sediment. The entire process is green and low-consumption, suitable for compact layout on water or near shore, and can simultaneously meet the requirements of sediment reduction, harmlessness, and resource recovery.

The present application relates to a kind of steel enterprises gas-solid pollutant discharge integrated management system and method, belong to steel enterprises environmental management technical field.The system includes four modules of environmental protection digital map module, wisdom dispatching and path optimization module, risk early warning module and account management module.The method first establishes the information database of whole plant waste gas treatment, carries out unified coding naming and identity electronic tag transformation to the waste gas treatment facilities and its associated solid waste of each production unit, secondly, sorts out the solid waste utilization way, carries out information transformation to solid waste transport vehicle, metering system, then again access inspection system data, transfer warehouse inventory information and solid waste treatment unit's inventory information.The present application can realize the efficient management and control of whole process of atmospheric treatment and solid waste circulation by the treatment, management and control integration of gas-solid pollutant, improve the accuracy, timeliness and standardization of management.

A gas supply device for the feed heater and thermal oil furnace of a naphtha hydrogenation unit is characterized by: a valve assembly installed on the inlet pipeline of the fuel gas separator; the inlet pipeline of the valve assembly is divided into two lines, one for natural gas and the other for the main fuel gas pipeline; the outlet pipeline of the fuel gas separator is also divided into two lines, one connected to the feed heater and the other connected to the thermal oil furnace. This invention, by adding a natural gas pipeline, switches the gas supply to the feed heater and thermal oil furnace to natural gas when flue gas indicators are abnormal, avoiding abnormal flue gas from the heater due to changes in fuel gas composition. This ensures stable operation of the unit and compliant flue gas emissions, meeting environmental protection requirements and reducing environmental risks for enterprises. It largely maintains the original structure of existing equipment, requiring no major modifications, and features low modification costs and high economic benefits.

The application discloses a method for recovering tin, gold and silver from high-gold-silver-tin-containing materials, and belongs to the technical field of non-ferrous metal smelting methods.The method adopts a hydrochloric acid-hydrogen peroxide system for leaching, so that tin, gold and silver enter a solution and are separated from insoluble residues; sulfur dioxide is introduced into the acid leaching solution to selectively reduce and precipitate sponge gold; after the gold is precipitated, silver chloride is precipitated by diluting the solution, and high-purity silver powder is obtained by dissolving the silver chloride in ammonia water and reducing the silver chloride by hydrazine hydrate, and the silver powder is cast into an ingot; the tin-containing solution can be recycled or neutralized to precipitate and recover tin.The method has a short process, realizes efficient separation of gold, silver and tin by selectively reducing gold by SO2 and precipitating silver by dilution, has high metal recovery rate (tin > 98.5%, gold > 99.5%, and silver > 99.5%), most of the solution is recycled, is environmentally friendly, has remarkable economic benefits, and the like.

This invention discloses a method for the comprehensive utilization of sulfide tailings, relating to the field of sulfide tailings treatment technology. This method uses lead-zinc tailings as raw material and innovatively employs a combined "two-stage acid leaching-gravity separation-flotation" process. First, two stages of acid leaching selectively leach calcite associated with barite in the tailings, reducing the influence of muddy calcite while activating pyrite. Subsequently, the acid leaching residue undergoes gravity separation to further separate undissolved calcite, quartz, and other silica-containing gangue minerals. The gravity concentrate is then subjected to flotation to achieve the separation of barite and pyrite, ultimately obtaining high-purity barite and pyrite products respectively. This invention features a reasonable process route and simple operation, effectively solving the separation problem of fine-grained, high-viscosity lead-zinc tailings, achieving full-component purification and utilization of lead-zinc tailings, significantly enhancing the economic value of tailings resources, and reducing the environmental pressure caused by tailings stockpiling, thus demonstrating good economic, environmental, and social benefits.

The application discloses a kind of low-carbon cementing material by waste incineration fly ash excited ore powder and preparation method thereof, by weight percentage, including the following components: modified waste incineration fly ash 8~12%, ion complex component 1~3%, composite shrinkage component 2~6%, ore powder 55~65%, water 23~28%.Preparation method includes the following steps: S1, preparation modified waste incineration fly ash, ion complex component, composite shrinkage component;S2, modified waste incineration fly ash, ion complex component, composite shrinkage component, ore powder, mixing water, fully mixed and stirred evenly, can obtain the low-carbon cementing material by waste incineration fly ash excited ore powder described in the application.In the aspect of component design, the application is environmentally friendly, low cost, in the performance aspect, the flow rate can be adjusted, the mechanical properties are excellent, the volume shrinkage is small.

This invention discloses a resource recovery method for low-phosphorus ferric phosphate production wastewater, belonging to the technical field of ferric phosphate wastewater treatment and resource recovery. The method includes the following steps: reacting the low-phosphorus ferric phosphate production wastewater with an iron source solution in a first precipitation reaction to obtain hydroxyferric phosphate precipitate and a first filtrate; the pH of the first precipitation reaction is 0.8~1.8; reacting the first filtrate with a catalytic oxidant in a second precipitation reaction to obtain manganese dioxide precipitate and a second filtrate; the pH of the second precipitation reaction is 6.0~9.5, and the redox potential is -50 to 250 mV; subjecting the second filtrate to membrane concentration treatment to separate desalinated water and concentrated water; subjecting the concentrated water to a first evaporation crystallization to obtain evaporation crystallization mother liquor and ammonium sulfate crystals; and subjecting the evaporation crystallization mother liquor to cooling crystallization to obtain magnesium ammonium sulfate crystals and cooling crystallization mother liquor. This invention achieves efficient recovery of phosphorus, manganese, monophosphate, and magnesium from low-phosphorus ferric phosphate production wastewater, with high product purity.

This invention discloses a method for preparing and applying a coumaric acid-modified MOF nanopesticide loaded with chlorantraniliprole, belonging to the field of pesticide formulation technology. The nanopesticide comprises: an iron-based metal-organic framework carrier MIL-101(Fe); chlorantraniliprole loaded within the pores of the carrier; and coumaric acid modified on the surface of the carrier through electrostatic interactions. The preparation method includes three steps: MIL-101(Fe) carrier synthesis, chlorantraniliprole loading, and coumaric acid surface modification. The process is simple and the conditions are mild. This invention utilizes the alkaline environment of the fall armyworm's gut to trigger carrier degradation, achieving targeted and controlled release of active molecules. Simultaneously, the released MIL-101(Fe) is reduced under the action of GSH in the gut, generating reactive oxygen species through the Fenton reaction, forming a synergistic insecticidal effect with coumaric acid. Experiments have shown that this nanopesticide exhibits far superior insecticidal activity against fall armyworm compared to single agents or carriers, possessing excellent insecticidal activity and environmental compatibility, making it suitable for green agricultural production.

This invention relates to the field of vapor phase corrosion inhibitors and discloses a green and environmentally friendly vapor phase corrosion inhibitor and its preparation method, which is composed of the following raw materials in the indicated mass percentages: phytic acid 30%-38%, citric acid 8%-12%, diethanolamine 32%-40%, morpholine 4%-8%, water 10%-15%, ethanol 4%-6%, benzotriazole 1.5%-2.5%, and alanine ternary complex 0.5%-3.0%. Phytic acid, extracted from rice bran processing byproducts, and citric acid, derived from citrus fruits, are used as the core organic acid components. The polyphosphate groups of these two components form a synergistic chelate system with the carboxyl groups. Combined with other green components, this eliminates dependence on non-renewable petrochemical products from the source of raw materials, truly realizing the green properties of the corrosion inhibitor, and exhibiting excellent biocompatibility. The alanine ternary complex, through the multi-coordination site structure formed by L-alanine, phosphoric acid, and dibutylamine, synergistically works with the heterocyclic structure of benzotriazole to fill the defects in the protective film formed by the adsorption of single benzotriazole, enhancing its adsorption and compatibility with different metal surfaces.

The application discloses a method for preparing semi-hydrated calcium sulfate whiskers by directional conversion of calcium-based components of waste incineration fly ash, and relates to the field of solid waste treatment. The application aims at the industry pain point of harmless disposal of waste incineration fly ash, and the core defect that the existing fly ash-based calcium sulfate whisker preparation technology cannot stably prepare high-purity high-aspect-ratio single-phase semi-hydrated calcium sulfate whiskers. Through a controllable process of "acid leaching calcium-precursor generation-ultrasonic assistance-hydrothermal conversion", the synergistic effect of harmless disposal and high-value utilization of waste incineration fly ash is realized, and the method has remarkable environmental benefits, economic benefits and industrial application value.

The application discloses a movable pry-mounted non-powered mine tunnel antimony-containing water gushing treatment system and method, the system comprises a plurality of warehouse bodies arranged side by side, and the warehouse bodies are sequentially a buffer homogenizing warehouse, a sedimentation warehouse, an adsorption treatment warehouse and a clean water buffer warehouse; the warehouse bodies are relatively arranged in an up-down sliding mode and are fixedly connected through a connecting rod located at the top; the method comprises the following steps: S1, preparation work; S2, hoisting and positioning; and S3, continuous water treatment; the system is integrally arranged in a standard container pry-mounted module, can be quickly deployed to any water gushing point accessible by road through road transportation, is driven by gravity generated by natural terrain difference throughout the journey, does not need external power supply and is perfectly suitable for mine areas without power supply.

This invention discloses a composite flocculant for wastewater from tea filter paper production and its preparation method. The composite flocculant comprises a prepolymerized titanium salt coagulant and a boric acid-functionalized lignin-based polymer. The prepolymerized titanium salt coagulant is prepared by controlling the alkalinity, and the boric acid-functionalized lignin-based polymer uses lignin as a backbone, grafted with cationic monomers and C... 14 -C 18 This composite flocculant comprises long-chain alkyl hydrophobic monomers and monomers containing arylboronic acid groups. Through a unique coupling mechanism, it utilizes the coagulation and charge neutralization effects of titanium salts and the adsorption bridging effects of lignin polymers, combined with the reversible cross-linking of boric acid groups and vicinal diols in polysaccharides, to achieve highly efficient and synergistic removal of fine fibers, colloidal particles, and dissolved organic matter from white water used in tea filter paper production. At dosages of 15-45 mg / L, it exhibits excellent performance in turbidity removal, COD removal, and suspended solids removal, making it particularly suitable for treating wastewater from tea filter paper production.

The application discloses a method for rapidly converting sludge into nutrient soil and the prepared nutrient soil, and belongs to the fields of sludge treatment and agronomy technology. Steps of the method for rapidly converting sludge into nutrient soil include: stirring and mixing hydrogen peroxide solution and ammonium sulfate, filtering after stirring and reacting under an acidic condition, washing, and drying to obtain ammonium persulfate; mixing calcium hydroxide and citric acid gypsum and then placing the mixture in a tube furnace to perform pyrolysis, so as to obtain a composite catalyst; adding the composite catalyst and the ammonium persulfate solution into sludge, stirring and reacting, and then the nutrient soil can be obtained. The macromolecules in the sludge are converted into small-molecule structures such as fulvic acid by the advanced oxidation technology, and the heavy metals in the sludge are passivated, so that the value of the nutrient soil is improved.

The application discloses a kind of multilayer biomass cellulose adsorption materials and its preparation method and application, belong to biomass material and sewage treatment technical field.The application first obtains PEI-cellulose by polyethyleneimine modification to biomass cellulose;Then PEI-cellulose and chitosan are crosslinked to prepare surface layer adsorption liquid;While unmodified biomass cellulose and polyvinyl alcohol are mixed to prepare middle layer adsorption liquid;Finally, by layer liquid nitrogen freeze forming, freeze drying and alkali washing treatment, obtain the biomass cellulose adsorption material with sandwich multilayer structure.The multilayer adsorption material prepared by the application has positive electricity on outer layer, can be efficiently adsorbed by electrostatic effect in water with negative electricity micro / nano plastic;Middle layer is neutral, can be used to adsorb organic pollutants carried by micro / nano plastic.The material of the application is low in cost, simple in preparation process, fast in adsorption rate, high in removal rate and reusable, and has good application prospect in water treatment field.

The application discloses a kind of based on ultrasonic extraction floatation cooperation's dredged sediment treatment resource system, comprising: pretreatment unit, first stage ultrasonic extraction reaction unit, second stage solid-phase adsorption reaction unit, third stage floatation separation unit, dehydration treatment unit, residual water treatment unit and nitrogen and phosphorus recovery unit.It also discloses a kind of based on ultrasonic extraction floatation cooperation's dredged sediment treatment resource method.The application solves the problems of low pollutant removal rate, high risk of secondary pollution of dredged soil and limited resource utilization in traditional dredged sediment treatment.Through the cooperation of "ultrasonic-liquid extraction-solid-phase adsorption-micro-nano bubble floatation" multi-unit, efficient release of nitrogen and phosphorus, simultaneous removal of microplastics, rapid separation of clean silt and pollution, and recycling of nitrogen and phosphorus for fertilizer production, the application realizes the resource utilization of clean silt.The whole process is green and low in consumption, suitable for compact arrangement on water or near shore, and can simultaneously meet the needs of sediment reduction, harmless and resource utilization.

This utility model discloses a manganese-containing tailings recovery system for electrolytic manganese, including a manganese recovery system, an ammonia recovery system, and a composite recovery system. The manganese recovery system includes a water washing sedimentation tank; the ammonia recovery system includes a roasting furnace and a first gas collection pipe connected to the roasting furnace, as well as a condensation pipe and an ammonia storage tank; the composite recovery system includes a steel mold press, the discharge pipe of which is divided into two paths, one connected to a calcining furnace; a second gas collection pipe is connected to the calcining furnace, the end of which is connected to a heating oxidation tank, and a packed tower is also provided below the heating oxidation tank; the other path is connected to a crushing and screening machine, which is also connected to a microwave reactor, and the microwave reactor is connected to an ultrasonic generator. This design utilizes the high-temperature calcination of manganese-containing tailings from electrolytic manganese and red mud, employing solid waste co-resource utilization technology, to recycle the manganese-containing tailings from electrolytic manganese as building materials, improving the solidification rate of heavy metals and the decomposition rate of ammonia nitrogen.

This invention belongs to the field of reaction vessel technology and relates to a chlorination reaction vessel. It includes a support frame to which a jacketed reaction vessel is fixedly connected. The jacketed reaction vessel contains a chlorine injection module and a stirring module for agitating the solution. A fixed shell is fixedly connected inside the jacketed reaction vessel, with a through hole in its center. A water ring distributor is fixedly connected to the top of the jacketed reaction vessel. This invention achieves in-situ interception and secondary absorption of chlorine through the cooperation of the fixed shell and the water ring distributor in the chlorine discharge channel. This significantly improves the utilization rate of chlorine, capturing the escaping chlorine and returning it to the main reaction zone for further reaction. Simultaneously, the water ring physically blocks the chlorine escape path, greatly reducing the instantaneous load and processing pressure of the downstream alkaline scrubbing tower and minimizing the environmental risks caused by chlorine impact.

The present application relates to the field of medicinal plant tissue culture, and particularly relates to a Nitraria sibirica culture medium and a culture method and application thereof. The method comprises the following steps: S1. Sterile seedlings are obtained by sequentially treating Nitraria sibirica seeds with concentrated sulfuric acid and chlorine fumigation; S2. Hypocotyls of the sterile seedlings obtained in S1 are cut and inoculated on a callus induction culture medium; the callus induction culture medium mainly comprises: MS culture medium + 17-23 g / L sucrose + 1.5-2.5 mg / L 6-BA + 0.1-0.4 mg / L NAA; S3. The callus obtained in S2 is inoculated on a callus proliferation culture medium; the callus proliferation culture medium mainly comprises: MS culture medium + 17-23 g / L sucrose + 0.3-3.5 mg / L 6-BA + 0.5-3.5 mg / L NAA. The quality and survival rate of the tissue culture seedlings can be improved, and the production cost and environmental risk can be significantly reduced.

This invention discloses a pesticide reduction and enhancement adjuvant and its preparation method, belonging to the field of pesticide technology. The adjuvant is composed of 7-9 parts potassium oleate, 1-2 parts dipotassium hydrogen phosphate, and 1-2 parts 2-ethylidene-5-phenylvaleric acid. The preparation method involves stirring and mixing the components at room temperature to form a homogeneous solution. When used in combination with chemical pesticides such as triadimefon, carbendazim, and pyraclostrobin, this adjuvant can significantly enhance pesticide efficacy. Even with a 50%-80% reduction in chemical pesticide usage, the control efficacy remains above 90%, effectively reducing pesticide residues and environmental risks. This invention has the advantages of simple composition, low cost, and environmentally friendly process, and is suitable for reducing pesticide use and increasing efficiency in agricultural production.

The application discloses a preparation method and application of manganese gypsum, and the method is characterized by the following steps: uniformly mixing manganese sulfate residue, red mud, desulfurization ash and water, stirring into slurry, and aging for a period of time to obtain the product manganese gypsum which can be used as a cement retarder. In the application, the alkaline solid waste red mud and desulfurization ash are added to the manganese residue, and the calcium sulfite in the desulfurization ash is oxidized in the mixing process, thereby modifying the manganese residue and improving the sulfur content in the manganese gypsum and the retarding effect. The preparation method is simple, the manganese residue disposal amount is large, the manganese residue is innovatively prepared into the retarder required by cement production, and the preparation method does not need high-temperature treatment and does not consume electric energy, so that the energy consumption is reduced. Finally, the difficult-to-handle manganese residue, red mud and desulfurization ash are solidified and treated to prepare the retarder required by cement production, the manganese residue is converted into a resource which can be directly used in the building material industry, the resource utilization of the waste is realized, the application is simple and practical, and the purpose of reducing cost and increasing efficiency is achieved.

This invention provides a modified limestone-derived carbon dioxide adsorbent from coal-fired solid waste and its preparation method. The preparation method includes: dry mixing limestone with coal-fired solid waste to obtain limestone-derived powder; and / or calcining limestone, mixing it with water, and then drying it to obtain slaked lime; dry mixing the slaked lime with coal-fired solid waste to obtain limestone-derived powder; mixing the limestone-derived powder with microcrystalline cellulose, and then mixing it with water to obtain a wet mixture; extruding and spheroidizing the wet mixture, and then drying and sieving it to obtain the modified limestone-derived carbon dioxide adsorbent from coal-fired solid waste. The modified limestone-derived carbon dioxide adsorbent from coal-fired solid waste of this invention is prepared by this method. This invention utilizes fly ash and desulfurization gypsum, the main solid waste generated from coal combustion, to prepare a modified limestone-derived CO2 adsorbent from coal-fired solid waste, making it more suitable for CaL systems while simultaneously absorbing the main solid waste from coal-fired power plants.

The application discloses a method for predicting and controlling formation rupture in a fracturing process, comprising the following steps: S1, arranging a three-component acoustic wave receiver array to continuously receive acoustic emission signals from a formation under a pile shoe; S2, enhancing the acoustic emission signals and converting the acoustic emission signals into digital signals through signal conversion; S3, predicting a rupture state and a rupture point position of a formation at the bottom of the pile shoe according to the digital signals; and S4, adopting a packer, a sealing insert pipe and other tools at the rupture point position to realize water injection in a part of a fracturing fracture and oil extraction in another part of the fracturing fracture. The method and system for predicting and controlling formation rupture in the fracturing process provided by the application can improve prediction accuracy, realize real-time monitoring and automatic adjustment, optimize resource utilization, reduce environmental and operation risks, improve work efficiency and cost benefits, enhance adaptability and sustainability, and bring about a significant technical progress.

The application belongs to the technical field of water treatment, and particularly relates to an ultrasonic-assisted micro-nano bubble dispersion and dissolution system for water treatment, which comprises an ozone generation unit, an ultrasonic generation unit, a micro-nano bubble generation unit, a circulating fluidized bed reaction unit and a temperature and pressure control unit. The ozone generation unit comprises an ozone generator, an ozone concentration detector and an ozone conveying pipeline, and the ozone concentration detector is arranged on the ozone conveying pipeline and used for monitoring the ozone concentration conveyed to the micro-nano bubble generation unit in real time. The application integrates the functions of ultrasonic-assisted micro-nano bubble generation, an efficient catalyst system, a circulating fluidized bed reaction and precise temperature and pressure control, realizes efficient dispersion and dissolution of ozone, strengthens the synergistic effect of adsorption and catalytic oxidation, significantly improves the removal efficiency of refractory organic pollutants in water, realizes cyclic utilization of ozone resources, and reduces operation cost and environmental risk.

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.