23 results about "High phosphorus" patented technology

The application discloses a high-phosphorus anti-gas-explosion vortex incinerator, which comprises a screening box, a pulverizer is fixedly connected to the outer wall of the screening box, three inverted hoppers are formed in the inner side of the screening box, a screening assembly is arranged in the inner side of the screening box, a screening plate is arranged at the screening end of the screening assembly, through holes are simultaneously formed in the inner side of the screening box, a dust filtering and cleaning assembly is arranged in the through hole, second auger blades are arranged at the cleaning end of the dust filtering and cleaning assembly, an auger conveying assembly is arranged at the bottom end of the inverted hopper, and an incinerator assembly is arranged at the discharging end of the auger conveying assembly.

The application provides a kind of low carbon high phosphorus weathering cold upsetting steel satisfying cold upsetting large deformation and preparation method, belongs to steel preparation field.The chemical composition of the cold upsetting steel includes:C:0.15%~0.25%, Si:0.20%~0.30%, Mn:0.30%~0.40%, Cu:0.20%~0.60%, P:0.08%~0.14%, S≤0.01%, Ni:0.10%~0.15%, Cr:0.20%~0.50%, Al T :0.025%~0.06%; wherein, C and P satisfy the following relationship: [P]*[C]≤0.035.Rationally design the chemical composition of cold upsetting steel, inhibit pitting by proper high phosphorus content and Cu, Ni element cooperation, form passivation film, satisfy the corrosion performance of the atmospheric environment characteristics of strong radiation, high SO2 concentration.At the same time, control C and P satisfy the relationship, avoid the problem of phosphorus segregation, grain boundary embrittlement, so as to satisfy the requirement of cold upsetting one-time forming limit quantity>80%.

This invention relates to a lanthanum-based composite phosphorus removal material and its preparation and removal methods, belonging to the field of water treatment. It solves at least one of the following problems existing in lanthanum-based phosphorus removal materials: the difficulty in balancing high adsorption capacity and structural stability, the difficulty in balancing excellent adsorption performance and simple preparation processes, and the difficulty in synergistically achieving high phosphorus removal efficiency and easy material recycling and regeneration. A method for preparing a lanthanum-based composite phosphorus removal material, using lanthanum nitrate hexahydrate and citric acid as the lanthanum source and carbon source respectively, includes the following steps: co-dissolving lanthanum nitrate hexahydrate and citric acid in water; stirring and mixing under heating conditions until a viscous liquid is formed; calcining the viscous liquid; and grinding the calcined product. This invention achieves high adsorption capacity, high selectivity, and rapid adsorption of phosphates in water, with stable structure, reduced production costs and process complexity, and excellent recycling and regeneration capabilities.

The invention discloses an integral phosphorus removal adsorbent based on a fibrous inorganic mineral material, a preparation method of the integral phosphorus removal adsorbent and application of the integral phosphorus removal adsorbent to removal of phosphorus in an aqueous solution. According to the invention, a fibrous inorganic mineral material with the size of more than centimeter level is used as a carrier, a non-noble metal salt is used as a precursor, non-noble metal hydroxide is formed through in-situ deposition, and the non-noble metal hydroxide is uniformly attached to the surface of the fibrous inorganic mineral material, so that the integral phosphorus removal adsorbent is directly obtained without further molding. The preparation process is simple, the material source is wide, the cost is low, and large-scale preparation is easy. The obtained adsorbing material can effectively remove trace phosphorus in water, has high phosphorus removal capacity and rapid adsorption kinetics, can realize an excellent treatment effect in a wide concentration and pH range, and can be recycled.

The present application relates to sewage treatment technical field, disclose a kind of MBR process with high membrane flux and high-efficiency phosphorus removal, the MBR process is between aerobic zone and MBR membrane pool Setting flow guide area and sedimentation area;Flow guide area and aerobic zone between being equipped with flow guide wall flow guide wall being equipped with flow guide hole, flow guide area and sedimentation area between being equipped with partition wall, water inlet being opened in the upper portion of partition wall, the sewage of flow guide area is buffered to the aerobic zone into sedimentation area;Sedimentation area and MBR membrane pool between being equipped with triangular weir plate, the sewage before entering MBR membrane pool is treated by sedimentation in sedimentation area, to reduce the membrane pollution speed, extend the service life of membrane group device.The MBR process with high membrane flux and high-efficiency phosphorus removal is mainly to the postpositioned anoxic section of biochemical reaction tank is reformed, without new building, by increasing some equipment and to postpositioned anoxic section local reformation can be realized, save operating cost, reduce the membrane pollution speed, extend the service life of membrane group device.

The application belongs to the technical field of metallurgy, and particularly relates to a flash treatment system and method for high-phosphorus oolitic hematite ore; wherein the flash treatment system for high-phosphorus oolitic hematite ore comprises a feeding device, a reaction chamber, a collecting device and a magnetic separation device; the inner wall of the core reduction zone of the reaction chamber is provided with a composite ceramic working layer, which is prepared through a sectional hot-pressing sintering process and has high density, high hardness and excellent thermal shock resistance; in the treatment process, the high-phosphorus oolitic hematite ore and a dephosphorization aid are jointly ball milled and dried, then sprayed into a carrier gas, and flash reduction is carried out in the core reduction zone with hydrogen as a reducing agent; the reduced product is separated by magnetic separation to obtain metallic iron powder and tailings, realizing efficient dephosphorization and rapid reduction of the high-phosphorus oolitic hematite ore, and having the advantages of short process flow, short reduction time, high dephosphorization rate and clean environment.

The present application relates to a kind of processes for thickening nickel plating of high phosphorus without burr, specifically comprising metal substrate pretreatment, plating solution preparation, plating solution post-treatment and electroless nickel plating steps. The plating solution composed of sodium phosphate dibasic, nickel sulfate, sodium hypophosphite, sodium fluoride, sodium citrate, propionic acid, bismuth nitrate, chelidamic acid, copper sulfate and sodium dodecyl sulfate is used for electroless nickel plating after compounding with composite stabilizer C. Composite stabilizer C is compounded by stabilizer A and stabilizer B according to a volume ratio of 2:1, wherein stabilizer A is composed of sodium thiosulfate and potassium iodate, and stabilizer B is composed of sodium dodecyl sulfate and ammonium molybdate. The present application overcomes the generation of burr while ensuring the thickening of the coating, and the coating is uniform, low cost, environmentally friendly and durable. The utilization rate of nickel in the plating solution is high, and the service life of the plated part is long.

The invention belongs to the technical field of red mud solid waste utilization, and particularly discloses a method for preparing a magnetic targeted phosphorus removal material through red mud in-situ crystallization and application of the magnetic targeted phosphorus removal material. The phosphorus removal material provided by the invention is prepared from the following raw materials in parts by mass: 85 to 95 parts of red mud, 10 to 20 parts of water and 1 to 4 parts of glucose. The phosphorus removal material has a composite structure of Fe3O4 magnetic core + Al (OH) 3 adsorption layer + SiO2 skeleton, has high phosphorus removal capacity and high magnetic saturation intensity, can still obtain better phosphorus removal performance after adsorption saturation through simple regeneration treatment, can be repeatedly used for 5-8 times at most, and greatly reduces the operation cost. The invention also provides a preparation method and application of the phosphorus removal material, the preparation process does not need high-temperature roasting, does not need additional addition of a magnetic reagent and an acid-base modifier, only utilizes the strong basicity of the red mud and iron and aluminum components, and takes glucose as a mild reducing agent to generate a composite structure of a magnetic core and a phosphorus removal adsorption layer in situ.

The application discloses a kind of denitrification biological high-efficiency phosphorus removal methods applied to sewage treatment, comprising the following steps: S1: sewage pretreatment;S2: anaerobic denitrification phosphorus removal;S3: enhanced denitrification phosphorus removal;S4: aerobic treatment;S5: sedimentation separation.The application combines biological treatment with electrolytic technology to form a new mechanism of physical-chemical-biological synergistic phosphorus removal, the iron ions generated by electrolysis and the biological phosphorus removal process promote each other, not only improves the phosphorus removal efficiency, but also reduces the use of chemical agents, reduces the risk of secondary pollution, fully plays the characteristics of denitrifying phosphorus accumulating organisms, realizes the efficient removal of phosphorus pollutants, overcomes the problems of high phosphorus removal cost, easy secondary pollution, greatly affected by water quality and quantity in the prior art, realizes efficient, low-cost, stable phosphorus removal effect.

The application belongs to the technical field of metallurgy, and particularly relates to a flash treatment system and method for high-phosphorus oolitic hematite ore; wherein the flash treatment system for high-phosphorus oolitic hematite ore comprises a feeding device, a reaction chamber, a collecting device and a magnetic separation device; the inner wall of the core reduction zone of the reaction chamber is provided with a composite ceramic working layer, which is prepared through a sectional hot-pressing sintering process and has high density, high hardness and excellent thermal shock resistance; in the treatment process, the high-phosphorus oolitic hematite ore and a dephosphorization aid are jointly ball milled and dried, then sprayed into a carrier gas, and flash reduction is carried out in the core reduction zone with hydrogen as a reducing agent; the reduced product is separated by magnetic separation to obtain metallic iron powder and tailings, realizing efficient dephosphorization and rapid reduction of the high-phosphorus oolitic hematite ore, and having the advantages of short process flow, short reduction time, high dephosphorization rate and clean environment.

The invention relates to a preparation method of a flue gas dephosphorizing agent. The preparation method comprises the following steps: (a) mixing an alkaline compound and magnesium salt according to the molar ratio of carbonate to magnesium ions of 1: 0.85-1: 0.95; (b) stirring and reacting the mixed material obtained in the step (a) through a coprecipitation method at normal temperature and pH of 7.5-9; (c) heating the slurry obtained in the step (b) to 90 DEG C in a hydrothermal kettle, stirring for 15 hours, and filtering; (d) curing the solid obtained in the step (c) in steam of an isopropanol aqueous solution for 2-24 hours, drying, and roasting; (e) respectively adding calcium hydroxide, plant ash, dihydrate gypsum and sodium hypophosphite into the product obtained in the step (d), uniformly mixing and kneading, and then carrying out extrusion molding; and (f) irradiating the product obtained in the step (e) under ultraviolet light for 2-36 hours, and drying at 120 DEG C for 2 hours to obtain the flue gas dephosphorizing agent. The dephosphorizing agent prepared by the method disclosed by the invention has relatively high phosphorus capacity and strength.

The invention provides a method for enhancing sludge pyrolytic phosphorus conversion through cooperation of an oxidizing agent and persistent free radicals, which comprises the following steps: (1) directly and mechanically dehydrating sludge, or adding persulfate for hydrothermal reaction, or adding a compound conditioner of ferrous sulfate and hydrogen peroxide for reaction, and dehydrating to obtain sludge with the water content of less than 60%; (2) the dehydrated sludge is mixed with an oxidizing agent, the adding amount of the oxidizing agent is 2-25 mmol / g dry sludge, a pyrolytic reaction is conducted under the anoxic condition, and after the pyrolytic reaction is finished, phosphorus-rich biochar generated through pyrolysis is collected; and (3) oscillating and soaking the collected phosphorus-rich biochar with an oxalic acid solution, carrying out solid-liquid separation to obtain a phosphorus-rich solution, adjusting the pH value of the phosphorus-rich solution to 4.5-5, and separating out phosphate crystals. The method has the remarkable advantages of being short in treatment process, high in organic phosphorus conversion rate, high in phosphorus product utilization rate and the like, and has important significance on rapid reduction and resource utilization of the municipal sludge.

The application discloses a method for removing COD and recycling resources from high-phosphorus and high-COD production wastewater in a new energy industry, and comprises the following steps: extracting wastewater to obtain an aqueous phase; adjusting the aqueous phase to be acidic and aerating under heating; adjusting the acid-base degree of the wastewater after aeration by using an alkaline substance, and performing reverse osmosis; and obtaining concentrated phosphorus-rich liquid and recycling the obtained fresh water. The application has the advantages of good COD removal effect, a removal rate of more than 98%, high phosphorus recovery rate, hydrolysis of polyphosphate in the wastewater into orthophosphate in the process of acidification, heating and aeration, and recovery of more than 80% of the phosphorus by using reverse osmosis concentration to obtain the concentrated phosphorus-rich liquid, thereby greatly improving the phosphorus recovery rate. The treatment process is simple, the treatment cost is greatly reduced, the phosphorus is directly recycled into the concentrated liquid, the treatment cost of a large amount of solid waste generated by the precipitation method and the cost of an additional precipitant are avoided, and the cost of wastewater treatment is greatly reduced.

The present application belongs to the field of steelmaking continuous casting, and relates to a method for preventing slag from falling during secondary tapping, reducing the temperature of the slag, changing the liquid slag into semi-molten slag, and effectively avoiding the slag from being rolled into the tapping hole and entering the ladle during secondary tapping. The present application reduces the high phosphorus content of the slag caused by secondary tapping, reduces the influence of the slag on the alloy yield caused by secondary tapping, eliminates the negative influence of secondary tapping when the molten steel is not completely tapped due to operation errors or other reasons, saves the composition out-of-specification caused by the incomplete tapping of the molten steel, and eliminates the influence of the incomplete tapping of the molten steel on the slag splashing and furnace protection.

This invention discloses a method for preparing phosphorus removal packing material for wastewater treatment and its application, relating to the field of wastewater treatment technology. The method includes the following steps: preparing a quaternary ammonium salt-lanthanum hybrid organosilane modifier; preparing an activated porous biochar; and grafting the quaternary ammonium salt-lanthanum hybrid organosilane modifier onto the activated porous biochar to obtain the wastewater treatment phosphorus removal packing material. The packing material prepared by this invention has high phosphorus removal efficiency and strong selectivity, and possesses excellent bactericidal and anti-bioclogging capabilities. Its active components are firmly grafted through covalent bonds, exhibiting good stability and allowing for multiple regenerations, effectively avoiding secondary pollution.

The application relates to a high-phosphorus-removal magnetic biochar as well as a preparation method and application thereof. The preparation method of the magnetic biochar comprises the following steps: mixing biomass and a FeCl3 solution to obtain a biomass-FeCl3 mixed solution, dehydrating the biomass-FeCl3 mixed solution to a water content of 68-78%, then adding calcium oxide to mix and expand, pressing, calcining, and crushing to obtain the magnetic biochar. The present inventors accidentally find, through a large number of experiments, that the prepared magnetic biochar, which is obtained by baking a mixed solution of a ferric chloride solution and biomass to a specific water content, then adding calcium oxide to mix and expand, not only improves the adsorption capacity of the biochar, but also enhances the phosphorus adsorption capacity of the magnetic biochar in neutral and weak alkaline sewage, effectively solving the problem that the phosphorus removal effect of the magnetic biochar in weak alkaline sewage is poor.

The invention relates to a method for efficiently recovering phosphorus from waste activated sludge, which comprises the following steps: S1, carrying out centrifugal dewatering on sludge, and carrying out ultrasonic treatment at normal temperature to obtain pretreated sludge, S2, mixing the pretreated sludge with a natural deep eutectic solvent, carrying out stirring reaction, dissolving out phosphorus, and carrying out centrifugal separation on a liquid phase and a solid phase to obtain the phosphorus. S3, adding a coagulant into the liquid phase, keeping the molar ratio of Fe / P at 1.5, adjusting the pH to 7.0, reacting for 1 hour under an anaerobic condition at a stirring rate of 200rpm, then standing the mixture for 2 hours, and performing reduced pressure distillation or water addition on the liquid phase to regenerate the natural deep eutectic solvent in the liquid phase, thereby obtaining a phosphorus-containing liquid phase and the natural deep eutectic solvent after separation; the method has the advantages of high phosphorus recovery rate and no secondary pollution.

The invention discloses a preparation method and application of an adsorbent for removing phosphorus from oily solid waste pyrolysis ash, and belongs to the technical field of solid waste resource utilization and polluted water treatment in environmental protection. According to the method, the oil-containing solid waste pyrolysis ash, anhydrous calcium chloride and sodium hydroxide are used as main materials, and the phosphorus removal adsorbent for the oil-containing solid waste pyrolysis ash is obtained through an alkali fusion method and a precipitation method. The dephosphorization adsorbent prepared by the method has good adsorption selectivity and trace processing performance on high-concentration phosphate, and has relatively large adsorption capacity. The prepared dephosphorization adsorbent for the oily solid waste pyrolysis ash has the advantages of large specific surface area and the like, and provides technical reference for adsorption and removal of anions in wastewater. According to the invention, the selected raw material is the oil-containing solid waste, and the oil-containing solid waste is utilized to prepare the environment-friendly efficient phosphorus adsorption material, particularly, the material has specific adsorption on a solution with high phosphorus concentration, and the potential application range of the pyrolysis ash containing the solid waste is expanded.

A method and system for selectively recovering hydroxyapatite from sludge incineration ash, comprising the following steps: by setting the concentration of hydrochloric acid solution, the phosphorus in the sludge incineration ash is extracted into the sludge leaching solution, and the mixture is separated into the sludge leaching solution and the acid leaching residue by a solid-liquid separation process; the sludge leaching solution is used for subsequent phosphorus extraction solution, and the acid leaching residue is used as a carrier to prepare a Zr adsorbent by coprecipitation with a Zr reagent; the concentration of phosphorus elements in the desorption solution is used as a basis for adding a calcium source, and hydroxyapatite products are generated in the desorption solution. It has the advantages of simple operation, high phosphorus recovery efficiency and low cost. The prepared adsorbent utilizes solid waste (acid leaching residue), and the prepared adsorbent has good stability, can selectively adsorb phosphorus elements directly from strong acid sludge leaching solution, and has good selective adsorption effect on phosphorus in the sludge leaching solution.

The application provides a modified polyaluminum chloride with high phosphorus removal performance and a preparation method and application thereof, and belongs to the technical field of modified polyaluminum chloride. First, aluminum chloride, zirconium oxychloride and an alkaline adjusting agent are reacted in an aqueous phase to prepare an aluminum-zirconium complex mother liquor, then a polyhexamethylene biguanide solution is added to the aluminum-zirconium complex mother liquor, and through electrostatic, coordination and hydrogen bond effects, effective compounding of organic long-chain molecules and inorganic complexes is realized. Finally, a polyol stabilizer, mannitol, is introduced into the organic-inorganic compounding system, and through the chelation effect on the metal center and the steric hindrance effect of the molecule, premature polymerization and precipitation of the product are inhibited. Through the complexation of zirconium ions and the strong electro neutrality of polyhexamethylene biguanide, the removal efficiency of phosphate is improved, the formed flocculating body is more compact, the settling speed is fast, and the application range of the product under complex water quality conditions is widened.

The invention relates to the field of wetland fillers, in particular to a preparation method of a constructed wetland filler, which is used for solving the problems of slow and limited phosphorus removal effect of the existing constructed wetland filler. According to the filler, ammonium bicarbonate is attached to biomass, pores are generated in the filler after pyrolysis, a high specific surface area and rich anchoring points are provided for functional components, iron oxide is promoted to be dispersed and deeply reduced into zero-valent iron, sodium salt is added to further promote generation of the zero-valent iron, S generated by decomposition of sodium hydrosulfite and the zero-valent iron form an iron sulfide shell, and the iron sulfide shell is separated from the iron sulfide shell. The preparation method comprises the following steps: modifying charcoal obtained by carbonizing reeds by adopting magnesium chloride, fixing thalli in gaps of the modified reed carbon, and spraying the modified reed carbon to the surface of the functional filler. The constructed wetland filler has the advantages of high phosphorus removal capacity, high speed and multiple ways through the synergism of phosphate adsorption sites, precipitation reaction sites and cold-resistant phosphorus-accumulating bacteria in the surface / pores, and can keep high efficiency at low temperature.

The application discloses a plating solution system for an ultrahigh-phosphorus chemical nickel plating layer, which comprises A agent, B agent and C agent, wherein the A agent comprises the following components: 250-350 g / L of nickel sulfate, 30-60 g / L of a complexing agent, 10-25 g / L of a buffer, 0.1-2 mg / L of a stabilizer, and the rest is deionized water; the B agent comprises the following components: 200-300 g / L of sodium hypophosphite, 5-15 g / L of an accelerator, 0.5-2 g / L of ammonia water, and the rest is deionized water; the C agent comprises the following components: 400-600 g / L of sodium hypophosphite, 10-25 g / L of an accelerator, 0.5-2 g / L of ammonia water, and the rest is deionized water; the A agent and the B agent are mixed at a volume ratio of 1:4-5, and then diluted by 3 times to form a working plating solution. During immersion plating, the aluminum alloy base material is first treated, then immersed into the working plating solution, and a chemical nickel plating reaction is carried out at 82-87 DEG C; and the A agent and the C agent are dynamically added during the nickel plating process; after the reaction is completed, the finished product is obtained through water washing and drying. Through the above manner, the content of phosphorus elements in the plating layer can be stably provided to be more than 12%, so that the use requirements of special working conditions are met.