110results about How to "Realize resources" patented technology

The invention discloses a method for harmlessly treating lithium slag and preparing a water-stable material from the treated lithium slag. The method comprises the following steps: crushing the lithium slag; mixing a sulfuric acid-containing material with the crushed lithium slag to obtain a pulpified mixture; roasting, and carrying out chemical modification to obtain roasted slag; adding a material containing activated aluminum oxide into the roasting slag to obtain a mixed material; the mixed material is subjected to water leaching and filtering, and leaching residues and leaching liquid are obtained; and drying the leaching slag, adding an exciting agent, and grinding to finally obtain the detoxified lithium slag. And preparing the water-stable material from the detoxified lithium slag. Under the condition of effectively improving the quality of the cement-stabilized layer, the lithium slag resource is effectively utilized, the resource utilization rate is improved, and the mechanical strength and corrosion resistance of the cement-stabilized layer concrete can be effectively improved by matching with the exciting agent and the curing agent.

The invention provides a comprehensive energy system optimization scheduling method and device considering diversified application of wind, light and green power, electronic equipment and a storage medium, and relates to the technical field of new energy technology and power system integration optimization. According to the method, a comprehensive energy system mathematical model integrating wind, light, green electricity, a hydrogen and ammonia production process, thermal power ammonia-doped combustion and thermal power oxygen-enriched combustion is constructed; combining the comprehensive energy system mathematical model to construct a comprehensive energy system scheduling model considering cost effectiveness, new energy utilization rate and environmental protection; and selecting a target solution algorithm from the plurality of solution algorithms, constructing an operation scene, and performing simulation solution on the integrated energy system scheduling model to obtain an integrated energy system optimization scheduling result. According to the embodiment of the invention, wind-solar-green-electricity hydrogen production ammonia synthesis and thermal-electricity ammonia-doped combustion and oxygen-enriched combustion technologies are effectively integrated, an ecological system for efficient cyclic utilization of energy and resources is created, and green transformation and industrial upgrading of an energy structure are promoted.

The invention relates to the technical field of membrane separation and resource recovery, and discloses a bipolar membrane electrodialysis device for synchronously capturing carbon dioxide, extracting lithium and producing lithium carbonate. The device utilizes a selective bipolar membrane electrodialysis system to extract lithium ions from liquid resources such as spodumene leachate, brine, oil and gas field wastewater, seawater and the like, and converts the lithium ions into lithium hydroxide. And meanwhile, introducing flue gas containing carbon dioxide into the generated lithium hydroxide solution by using a gas disperser to generate lithium carbonate. Therefore, mineralization capture of carbon dioxide in the flue gas, extraction of lithium ions in liquid resources such as spodumene leachate, brine, oil and gas field wastewater and seawater and production of lithium carbonate are synchronously realized, waste is treated by waste, and the method has the advantages of simple process, high lithium ion yield, short period, environmental friendliness, no pollution, continuous production and the like, and is suitable for industrial production. The method has important significance on carbon dioxide capture, lithium resource recovery and development of the new energy industry.

The invention provides a cement stabilized macadam mixture based on large-dosage lithium slag and a preparation method of the cement stabilized macadam mixture, and relates to the technical field of preparation of cement stabilized macadam layers.The preparation method comprises the steps that aggregate, cement, fly ash, lithium slag powder and a second exciting agent are mixed and stirred to be uniform, and the cement stabilized macadam mixture is obtained; and uniformly stirring the cement stabilized macadam mixture and water, and carrying out compression molding to obtain the cement stabilized macadam mixture based on the high-doping-amount lithium slag. According to the application, the lithium slag is subjected to activation, curing granulation and other processes to replace a part of cementing materials and graded broken stones in a cement stabilized broken stone layer, so that recycling, large-scale energy utilization and high-performance utilization of the lithium slag are realized; the lithium slag, the lithium slag powder and the active and non-active tailing smelting slag are prepared into the autoclaved artificial aggregate, and the autoclaved artificial aggregate is prepared into the cement stabilized macadam mixture, so that large-scale utilization of the lithium slag is realized, and the cost is reduced; the industrial waste and the lepidolite lithium slag are utilized, so that the environmental pollution is reduced, and the resource utilization of the waste is realized.

The invention provides a method for synergistically recovering valuable elements from waste ternary lithium battery black powder and a spent automobile catalyst, and belongs to the technical field of solid waste recycling. The method comprises the following steps: mixing waste ternary lithium battery black powder, a spent automobile catalyst, coke and a slag former, and sequentially pelletizing and smelting to obtain lithium oxide-containing dust, PGMs-nickel cobalt manganese and smelting slag; carrying out magnetic separation on the smelting slag, and merging the secondarily enriched PGMs-nickel-cobalt-manganese alloy into the PGMs-nickel-cobalt-manganese alloy in the step (1); the PGMs-nickel cobalt manganese alloy, a hydrochloric acid solution and a sodium chlorate solution are mixed and then subjected to acidolysis, the obtained mixed solution is subjected to extraction, reverse extraction and precipitation, and recovery of platinum group metal, lithium and nickel cobalt manganese is achieved. The collaborative recovery method is adopted, the recovery rate of the platinum group metal is larger than or equal to 98%, the recovery rate of lithium is larger than 92%, the recovery rate of nickel-cobalt-manganese resources is larger than or equal to 90%, a new trapping agent does not need to be added in the platinum group metal trapping process, and valuable elements are fully applied.

The invention provides a method for removing sulfur ions in water by coupling a piezoelectric catalytic fuel cell with oxygen oxidation, and belongs to the technical field of wastewater treatment. The method is characterized in that a Fe-coated MoS2 / CFC piezoelectric catalytic electrode is prepared by a one-step hydrothermal method, and a piezoelectric catalytic fuel cell enhanced air oxidation system is constructed based on the electrode. The method has the advantages that 91% (-14.7 mg) of sulfur ions (S < 2->) can be removed within 1.5 h by utilizing the piezoelectric catalytic fuel cell and only aerating, and the system has excellent piezoelectric catalytic activity, has the characteristics of high efficiency and greenness in sulfur ion removal, and has a good application prospect in the fields of catalytic fuel cells and advanced oxidation treatment of wastewater.

The invention discloses a method for preparing ferric trichloride and / or phosphoric acid from residues obtained after lithium extraction of failed lithium iron phosphate, which comprises the following steps: S1, taking the residues obtained after lithium extraction, and adding a leaching agent for leaching to obtain a leachate 1 and residues 1; s2, an extraction agent is added into the leachate 1 for extraction, the pH of an oil-water mixed homogeneous phase is controlled to be 0.2-1.0, and phosphorus-containing extraction raffinate 1 and an organic phase containing ferric trichloride are obtained; then the organic phase containing ferric trichloride is subjected to reverse extraction, and a ferric trichloride solution is obtained; the leaching agent in S1 is a hydrochloric acid solution, and the extracting agent in S2 is a tributyl phosphate solution. By the adoption of the method, iron and phosphorus in the slag obtained after lithium extraction are extracted respectively, ferric trichloride and wet-process phosphoric acid can be used for water treatment and chemical production respectively, and recycling of the slag obtained after lithium extraction is achieved.

The invention provides a process system and a process method for recycling a hexafluoropropylene oxide byproduct high-boiling residue, and relates to the field of fine fluorine chemical industry. The process system comprises a heat exchange device, a tubular pyrolysis reaction device, a carbonyl fluoride-trifluoroacetyl fluoride separation tower, a tubular cracking reaction device, a water washing device and an alkali washing device. According to the method disclosed by the invention, the industrial-grade carbonyl fluoride and trifluoroacetyl fluoride are prepared by catalytically pyrolyzing the hexafluoropropylene oxide by-product high-boiling residue; furthermore, a byproduct high-boiling residue of hexafluoropropylene oxide is subjected to complete catalytic cracking to obtain carbonyl fluoride, and a byproduct industrial hydrofluoric acid can be obtained. According to the process system and the process method, the hexafluoropropylene oxide byproduct is recycled into carbonyl fluoride, trifluoroacetyl fluoride and industrial hydrofluoric acid with high added values, harmlessness and recycling of the hexafluoropropylene oxide byproduct high-boiling residues are achieved, the utilization rate of fluorine atoms is 100%, and the process method is mild in reaction condition, economical and environmentally friendly.

The invention belongs to the technical field of backfill materials, and particularly discloses a road shallow wet and soft foundation backfill material and a preparation method thereof. The road shallow wet and soft foundation backfill material is prepared from the following raw materials in parts by weight: 40 to 50 parts of building residue soil, 10 to 15 parts of modified diatomite, 15 to 20 parts of cement, 7 to 10 parts of modified chitosan, 60 to 70 parts of water and 5 to 9 parts of sodium carbonate. The road shallow wet and soft foundation backfill material prepared in the invention has relatively good strength, crack resistance and tensile strength, so that the bonding force between the building residue soil and other components is relatively good, and the structural strength and stability of the backfill material are improved.

The invention discloses a method for generating calcium carbonate through microorganism mineralization by exciting gypsum solid waste, and belongs to the field of solid waste recycling. The method comprises the following steps: pretreating the gypsum solid waste; exciting the gypsum solid waste; preparing a microbial bacterial liquid; and mixing the microbial liquid with the excited calcium source. According to the method, the gypsum solid waste is used as a calcium source substitute for generating calcium carbonate through microbial mineralization, so that the problems of singleness and high price of a calcium source in a microbial mineralization technology are solved, and meanwhile, the gypsum solid waste can be greatly and reasonably recycled. Meanwhile, a new solution is provided for large-scale application of a microbial mineralization technology. Besides, the utilization of the gypsum solid waste can further reduce the cost of the technology, the pure-phase calcium carbonate can be generated through one-time microbial mineralization, CO2 gas does not need to be introduced, various chemical reagents do not need to be used, the process is simple, and the equipment requirement is low.

The invention provides a lithium slag-based composite admixture and a preparation method thereof, and in the preparation method of the lithium slag-based composite admixture, lithium slag is subjected to sulfur reduction, alkali treatment and grinding treatment, so that the sulfur content in the lithium slag is reduced, later hydration is promoted, and the doping amount of the lithium slag during preparation of the composite admixture is increased. According to the application, before the sulfur removal agent is added, the gypsum in the ammonium salt is utilized to react to generate SO4 < 2->, so that sulfur, which is originally insoluble in water, in the gypsum exists in a form which is easier to treat, and the sulfur reduction effect is improved. And the sulfur-reduced lithium slag and carbonate are subjected to a heating reaction, so that feldspar minerals in the lithium slag are subjected to bond breaking-dissociation, and a product beneficial to hydration of a cementing material is generated. And the pretreated lithium slag is cooperated with one or more industrial solid wastes to prepare the composite admixture, so that the recycling, high-performance and harmless utilization of the lithium slag is realized.

The production line comprises a crushing and grinding device, a liquid preparation system, an electrolysis system, a post-treatment system and a manganese residue treatment system, and the liquid preparation system comprises a slurrying barrel, a chemical combination barrel, a first filter press, a vulcanization pool, a second filter press, a purification tank, a third filter press and an elevated tank. The crushing and grinding device is communicated with the slurrying barrel, an outlet of the slurrying barrel is communicated with the chemical combination barrel, the chemical combination barrel is communicated with the first filter press, the first filter press is communicated with the vulcanization pool, the vulcanization pool is communicated with the second filter press, the second filter press is communicated with the purification tank, the purification tank is communicated with the third filter press, the third filter press is communicated with the head tank, and the head tank is communicated with the electrolysis system. The anolyte storage tank is respectively communicated with the slurrying barrel and the chemical combination barrel, and the first filter press, the second filter press and the third filter press are connected with a manganese slag treatment system. According to the production line, the leaching rate and the impurity removal rate can be increased, manganese slag recycling is achieved, and generation and emission of pollutants in the production process are reduced.

The invention belongs to the technical field of biomass pyrolysis and carbonization, and particularly relates to a biomass continuous pyrolysis and carbonization system and a biomass carbonization method. Comprising a pyrolysis unit used for pyrolyzing biomass to generate biochar and conveying biomass pyrolysis gas generated by pyrolysis to a dust removal unit; the bio-oil collecting unit comprises a heat exchanger and a bio-oil collector, gradient heat exchange is carried out through the heat exchanger, and condensed bio-oil and deoiled biomass pyrolysis gas are obtained; the CO2 removal and gas collection unit comprises a CO2 remover and a gas collection tank and is used for removing CO2 in the deoiled biomass pyrolysis gas and collecting combustible gas in the deoiled biomass pyrolysis gas; and the combustor is used for combusting the combustible gas to generate heat energy and conveying the heat energy to the pyrolysis unit. The biomass continuous pyrolysis carbonization system is formed by the pyrolysis unit, the bio-oil collection unit, the CO2 removal and gas collection unit and the combustor, and waste heat recycling and bio-oil recycling are achieved.

The invention discloses a two-stage process for preparing powdery quality-improving fuel through biomass baking, which comprises the following steps: S1, a drying procedure: carrying out coarse crushing on biomass to form biomass particles, and screening and drying the biomass particles; s2, a low-temperature baking and powdering process: baking the dried biomass particles, and performing multi-stage fine crushing and grinding on the biomass particles in the baking process to form biomass powder; and S3, cyclic utilization of the baking gas: circularly inputting one part of the baking gas generated in the biomass particle baking process in the step S2 into the step S2 to provide heat for the baking process, and returning the other part of the baking gas to the step 1 to provide heat for the drying process. According to the technology for preparing the powdery upgrading fuel through two-section type biomass baking, powder preparation is completed while baking is conducted through the stirring unit, the baking powder preparation time is greatly saved, and compared with three-section type baking powder preparation, the production efficiency is greatly improved, and the baking efficiency is greatly improved.

The invention relates to the technical field of flood control dispatching, and discloses a reservoir flood control water level dynamic control and flood recycling method and system, and the method comprises the steps: obtaining a surface rainfall forecast value of a reservoir basin based on real-time rainwater condition data and numerical weather forecast; a hydrodynamics and hydrology coupled drainage basin runoff model is driven, and an in-reservoir flood hydrograph in a predicted period is generated; judging the flood scale and grade based on the hydrograph, and when the flood is medium and small flood, calculating the dynamic flood control storage capacity of a downstream flood control object by adopting an equivalent flood control effect algorithm taking into account the pre-discharge scheduling capability; according to the dynamic flood control storage capacity, a dynamic flood control water level control value is obtained through backstepping of a water level-storage capacity relation curve of the reservoir; and finally, generating and executing a reservoir dispatching instruction based on the control value, and storing the water level of the reservoir to not exceed the dynamic value. The problems that a fixed flood control water level method is low in water resource utilization rate and inflexible in dispatching are solved, and flood resource efficient utilization on the premise of flood control safety is achieved.

The invention discloses an environment-friendly hazardous waste treatment and intelligent collection system, which comprises a resource utilization module, which is used for accurately classifying hazardous wastes through a classification and identification technology, screening out wastes with utilization values, and comprehensively utilizing the wastes through a physical, chemical or biological method to realize maximum recovery of resources; the harmful substance curing module is used for effectively curing harmful substances in the hazardous wastes by adopting an efficient curing technology so as to ensure that secondary pollution to the environment cannot be caused in the subsequent treatment process; the method has the beneficial effects that recycling, reduction and innocent treatment of hazardous wastes are realized, and the development of circular economy is promoted; the intelligent level of hazardous waste treatment is improved, the collection, transportation and management process is optimized, and the cost is reduced; environment monitoring and data connection are enhanced, and the safety and compliance of the processing process are ensured; comprehensive cost control and decision support are provided, and economic benefits and social benefits of enterprises are improved.

The invention relates to the technical field of agricultural cultivation, in particular to a fine grain tailing-based rice seedling substrate and a preparation method thereof. The fine grain tailing-based rice seedling raising substrate comprises the following components: fine grain tailings, fresh animal waste powder, a modifier A and diatomite. The fine grain tailing rice seedling raising substrate has excellent water and fertilizer retention performance, can effectively improve the soil structure and physicochemical properties, improves the air permeability and water retention of the substrate, promotes plant growth, and reduces dependence on soil resources and influences on the environment. The fine grain tailing-based rice seedling substrate prepared by the invention is wide in material source and simple in preparation process, has the advantages of promoting healthy and strong growth of seedlings, enabling seedlings to emerge neatly, being developed in root system, multiple and long in root system, strong in root system coiling force, high in seedling rate, high in comprehensive quality of the seedlings and the like, and has a relatively wide application prospect.

The invention belongs to the field of gas technical purification, and particularly relates to a honeycomb-shaped high-concentration NO2 adsorption trapping material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing adsorbent slurry by taking high-silicon molecular sieve raw powder as a raw material; (2) putting a honeycomb carrier into the adsorbent slurry for dipping and coating; and (3) naturally airing, drying and roasting the impregnated carrier to obtain the integral honeycomb-shaped high-concentration NO2 adsorbing and trapping material. On the basis of the honeycomb-shaped high-concentration NO2 adsorption trapping material (the molecular sieve silica-alumina ratio is 1000-5000), NO2 is efficiently trapped through a pressure swing adsorption technology, meanwhile, the adsorbent subjected to adsorption saturation is reversibly regenerated, high-concentration NO2 desorbed gas is obtained, NO2 recycling is achieved, NOx tail gas of a nuclear industry post-treatment plant is recycled, and the purpose of recycling the NOx tail gas of the nuclear industry post-treatment plant is achieved. A stable NO2 gas source is provided for a spent fuel post-treatment main process, the dual requirements of NO2 raw material preparation and tail gas denitration of a post-treatment plant are met, and purification and recycling of NO2 are achieved.

The invention relates to a sludge treatment process and device based on flash evaporation, and the device comprises a first-stage flash evaporation system, and also comprises any one of a hydrolysis tank and a second-stage flash evaporation system. According to the method, the sludge is subjected to resourceful treatment in a flash evaporation and pyrohydrolysis and / or secondary flash evaporation mode, cell walls in the sludge can be fully and effectively broken under the low-temperature condition through the flash evaporation technology, moisture and solutes in cells are released, the dewatering performance of the sludge is improved, and the sludge can be recycled. The wall-broken sludge is conveyed to the hydrolysis tank for hydrolysis and / or the second flash evaporation tank for flash evaporation and drying, and the wall-broken sludge is more easily hydrolyzed and / or dried. The problems of high energy consumption, large heat loss and long treatment time in the sludge drying process are solved, and the productivity is greatly improved.

The invention relates to the technical field of sewage multi-stage treatment, in particular to a high-efficiency aquaculture tail water treatment system and equipment, which comprises a sedimentation tank, a water inlet pipe, a water outlet pipe, a pre-filtering tank, an anti-blocking structure and a collecting structure, the water inlet pipe and the water outlet pipe are communicated with the sedimentation tank, and the pre-filtering tank is arranged on one side of the water inlet pipe; the pre-filtering box is arranged in the settling pond and used for pre-filtering tail water entering the settling pond, the anti-blocking structure is arranged in the pre-filtering box and used for cleaning the interior of the pre-filtering box, and the collecting structure is arranged on one side of the pre-filtering box and used for collecting and cleaning impurities in a centralized mode. Therefore, most impurities in the tail water can be collected in advance, the treatment burden of the sedimentation tank is reduced, and the working efficiency is improved.

This invention belongs to the field of recycling and purification technology, specifically relating to a method for recovering the β isomer from a CME solution containing both β and α isomers. The method includes the following steps: concentrating the CME solution containing both β and α isomers and dissolving it in methanol with trichloroacetic acid to form a salt, followed by cooling and crystallization and filtration to obtain the trichloroacetic acid salt of the CME β isomer; then, ionizing the trichloroacetic acid salt of the CME β isomer in methanol with ammonia to obtain the CME β isomer. By reacting trichloroacetic acid with the α and β isomers of CME to form a salt, the different solubilities of the trichloroacetic acid salts of the α and β isomers are utilized to separate the trichloroacetic acid salt of the CME β isomer, and then ionizing the trichloroacetic acid salt of the CME β isomer with ammonia, the CME β isomer is recovered.

The application discloses a carbon dioxide adsorption material for electronic waste regeneration and a preparation method thereof. The carbon dioxide adsorption material is prepared from electronic waste nonmetal powder as raw material. On one hand, the electronic waste is pretreated to ensure that the electronic waste can be used in a high value mode; on the other hand, the electronic waste is converted into a high-performance adsorbent which is directly used for capturing carbon dioxide in industrial waste gas, so that one kind of waste is used to treat another environmental pollutant from the source. Not only is the difficulty in processing the nonmetal components of the electronic waste and the heavy pollution solved, but also a low-cost material is provided for carbon dioxide emission reduction, the production cost of the adsorbent is reduced, the unity of environmental benefits and economic benefits is realized, and the application is a typical practice of the circular economy concept.

The invention discloses a zinc-containing wastewater recycling device which comprises an oil-water mixed phase separation mechanism and an activated carbon adsorption separation mechanism, the device is used for performing oil-water separation on the zinc-containing wastewater in three stages: in the first-stage separation, a large amount of oil phase and solid impurities are removed under the action of an oil scraper and a settling slope, and in the second-stage separation, the oil phase mixed in the water phase rises to the liquid level along with bubbles to be separated under the action of a compressed air pipe; in the third-stage separation, activated carbon powder is used for adsorbing a residual oil phase in an overflow water phase, a filter press is used for filter pressing, zinc-containing waste water which is relatively clean in oil removal is obtained, oil-water separation of the zinc-containing waste liquid is achieved, and the zinc-containing waste water after oil removal is recycled to a production system. Compared with a chemical method and a high-temperature decomposition method, addition of impurity elements and energy consumption can be effectively avoided, the input amount of activated carbon can be effectively reduced in the carbon powder adsorption process, and the workload of a filter press is reduced, so that the production cost is effectively controlled, and the production efficiency is improved.

The present application relates to a kind of methods and devices for preparing anhydrous hydrogen fluoride and sulfuric acid.The method comprises the following steps: removing impurities from industrial waste fluorosulfuric acid, mixing it with concentrated sulfuric acid to form a pretreated mixture; using microwave heating to rapidly heat the reactor, a static bed is arranged in the reactor; the pretreated mixture is passed into the upper surface of the static bed in the preheated reactor, the pretreated mixture is heated by microwave, and hydrogen fluoride and sulfur trioxide gas are generated by the decomposition of the pretreated mixture; hydrogen fluoride and sulfur trioxide are mixed and passed into low-temperature concentrated sulfuric acid to absorb sulfur trioxide gas; then passed into low-temperature condensing equipment, and liquid hydrogen fluoride is collected; the liquid hydrogen fluoride is purified by rectification; and the concentrated sulfuric acid that absorbs sulfur trioxide is evaporated and concentrated.The advantages are: using a "static bed + material" double-wave absorption system, achieving more uniform and stable temperature field distribution in the liquid layer of industrial waste fluorosulfuric acid, making the pyrolysis of industrial waste fluorosulfuric acid more efficient and stable.

The invention belongs to the field of sludge resource utilization, and particularly relates to a high-speed train excrement collector wastewater sludge reduction and resource utilization device, system and method. The device comprises a septic tank and a sludge fermentation tank which are sequentially connected, the interior of the septic tank is of a grid structure, a water inlet pipe and a water outlet pipe are arranged on the upper portion of the side wall of the septic tank, and a water ejector used for collecting sludge in different grids of the septic tank is further arranged above the septic tank; the bottom of the sludge fermentation tank is provided with an inclined bottom wall and a fermentation tank inner spray head used for spraying sludge upwards, the sludge fermentation tank is internally provided with a division baffle used for limiting the sludge from flowing along a turn-back type flowing path, and a sludge flowing and settling channel is formed between the division baffle and the inclined bottom wall. According to the method, resource utilization of the excrement collection type wastewater sludge is realized, the treatment cost of the sludge is saved, the potential risk of the sludge to the environment is reduced, sludge reduction and resource utilization are realized, the number of equipment is reduced, the operation cost is low, the operation is simple, and the raw materials are cheap.

The invention relates to a method for preparing calcium fluoride from household garbage incineration fly ash and application, a three-stage countercurrent washing device is utilized, and the method comprises the following steps that S1, the fly ash is collected for pulping; s2, the fly ash obtained after pulping is put into a third-stage countercurrent washing device to be sequentially subjected to first-stage washing, second-stage washing and third-stage washing, third-stage washing liquid generated after third-stage washing is used for second-stage washing, and second-stage washing liquid generated after second-stage washing is used for first-stage washing; s3, primary water washing liquid generated after primary water washing enters a water treatment system, acid is added to adjust the PH, then a capturing agent is added for a reaction, and first wastewater is formed; s4, adding sodium fluoride into the first wastewater, and precipitating to generate calcium chloride and calcium fluoride; and S5, calcium fluoride is washed with water to remove impurities, second wastewater and calcium fluoride are formed, and the calcium fluoride is applied to the additive for electrolytic aluminum. The calcium salt in the fly ash is separated to produce calcium fluoride with high added value, waste acid can be cooperatively treated, and the product calcium fluoride is used as an electrolytic aluminum additive.

The invention relates to the technical field of road stone preparation, and discloses a phosphogypsum-based all-solid waste environment-friendly road stone preparation process, which comprises: 1, carrying out a dehydration treatment on phosphogypsum to reduce the free water content to less than 1.5%; step 2, carrying out high-temperature calcination on the dehydrated phosphogypsum in a temperature range of 650 DEG C to 750 DEG C to form alpha-semi-hydrated gypsum; 3, adding a sodium silicate solution into the calcined ardealite for chemical modification to generate calcium silicate gel, so as to improve the water resistance and shrinkage resistance of the calcium silicate gel; and step 4, adding solid waste materials such as the building waste, the fly ash, the slag and the waste glass powder into the phosphogypsum according to a given proportion, crushing and uniformly mixing. The ardealite and the solid waste material are compounded, and an optimized process of a green bio-based binder and a nano material is adopted, so that the mechanical property, the water resistance, the toughness and the weather resistance of the road stone are remarkably improved, and the road stone has the advantages of high efficiency, environment friendliness, long service life, economy and applicability.

The invention discloses a system and a method for hydrogen production by SOEC electrolysis of oilfield sewage, and belongs to the technical field of sewage environmental protection. According to the system disclosed by the invention, the SOEC electrolytic tank is arranged, so that electrolytic products of SOEC are fully utilized, products obtained in the treatment process are useful resources such as hydrogen and oxygen, high-purity oxygen can be used for oxidation treatment of oilfield sewage, and hydrogen can be used as a clean and efficient energy source, so that recycling of oilfield sewage is realized; and meanwhile, the high-temperature characteristic of SOEC electrolysis is utilized, the generated high-temperature gas is subjected to heat regeneration utilization through the waste heat utilization module, the energy utilization rate is greatly increased, and input energy needed by the system is reduced.

The invention belongs to the technical field of solid waste recycling. The invention discloses a method for realizing high-value recycling of secondary aluminum ash and synchronous deep defluorination and dechlorination by utilizing hydrothermal synthesis. The method comprises the following steps: firstly, pretreating secondary aluminum ash, then preparing the pretreated secondary aluminum ash and water into slurry, and adding a specific defluorinating agent and a dechlorinating agent into the slurry to construct a synchronous reaction system; the system is subjected to hydrothermal reaction under high-temperature and high-pressure conditions, so that fluorine and chlorine elements are respectively fixed and converted into stable compounds. Solid-liquid separation is carried out after the reaction is completed, an obtained solid product can be used as a raw material for preparing a zeolite molecular sieve or an aluminum-based material, and salt is recovered from a liquid part through evaporative crystallization. According to the method, deep removal of harmful elements and a high-value recycling process of beneficial components are coupled to a single hydrothermal system, and efficient harmless and high-value recycling utilization of the secondary aluminum ash is achieved.

The invention discloses a surface quasi-class II drinking water source water replenishment and regeneration treatment system and method, comprising an aerated grit chamber, a biological treatment section, an MBR tank, an ozone oxidation section, a sludge concentration and decomposition tank, a disinfection section and an artificial wetland section; the biological treatment section comprises a pre-anoxic zone, an anaerobic zone, a primary aerobic zone, a primary anoxic zone, a secondary aerobic zone and a secondary anoxic zone; the water outlet of the aerated grit chamber is respectively connected with the water inlets of the pre-anoxic zone, the anaerobic zone, the primary anoxic zone and the secondary anoxic zone; the water outlet of the secondary aerobic zone is connected with the water inlet of the pre-anoxic zone; the sludge outlet of the MBR tank is connected with the sludge inlet of the primary aerobic zone; the sludge outlet of the MBR is connected with the sludge inlet of the sludge concentration and decomposition tank, the sludge lysate outlet of the sludge concentration and decomposition tank is connected with the pre-anoxic zone, and the residual sludge of the sludge concentration and decomposition tank is processed into a mud cake and enters the artificial wetland. The surface quasi-class II drinking water source water replenishment and regeneration treatment system of the invention has the advantages of good treatment effect and low operation cost.