17 results about "Lime sulfur" patented technology

The invention discloses a heavy metal emission reduction and sludge reduction treatment process method for circuit board wastewater. The invention provides a layered precipitation strategy of'first acid, second alkali and second sulfur '. The method comprises the following steps: performing acid precipitation on alkaline organic wastewater by using acidic wastewater, and recovering printing ink residues; carrying out air stripping treatment on the copper ammonia wastewater by utilizing an alkaline condition, and precipitating high-purity copper hydroxide; and finally, carrying out deep precipitation on residual complexing heavy metals by utilizing excessive sulfides in the pretreatment stage, and further recovering copper resources in the comprehensive water tank through coprecipitation of copper hydroxide and copper sulfide. Sludge generated in each process is classified and treated; printing ink slag, biochemical residual sludge and copper / nickel sulfide sludge are subjected to synergistic pyrogenic process treatment; copper hydroxide sludge is selectively subjected to acid dissolution to prepare copper sulfate. Lime, ferrous sulfate and polyaluminum are not used in the whole process. According to the method, the medicament is utilized to the maximum extent, the sludge is reduced by 50% or above, and the resource value of valuable metal is increased by 3-5 times.

The invention discloses a process for removing sulfur dioxide in lepidolite sintering flue gas, and belongs to the technical field of modified nano materials. According to the process, sodium bicarbonate (40-65%), slaked lime (15-30%), lithium sulfate (5-12%) and modified polyvinylidene chloride fiber (10-30%) are compounded into an adsorbent, the adsorbent is injected into an electrostatic agglomerator at 120-160 DEG C through high-pressure injection (0.5-1.0 MPa), and the adsorbent and fly ash particles are co-agglomerated under an electric field of 30-40 kV to adsorb SO2. Methyl acrylate / glycidyl methacrylate graft modified nanofibers are innovatively adopted, and a three-section temperature control regeneration technology is combined, so that the adsorbent can be recycled for more than 20 times. The process integrates a dual adsorption mechanism of electrostatic agglomeration and bag filtration, the desulfurization efficiency exceeds 95% in a 10-20% humidity environment, meanwhile, the problems of equipment corrosion of a traditional wet method and low efficiency of a dry method are solved, and the operation cost is reduced by 65% compared with that of a conventional process.

The invention belongs to the technical field of sewage denitrification, and provides a preparation method of a high-temperature-sintering-free sulfur-iron compound autotrophic denitrification filler, which comprises the following steps: mixing pyrite, sulfur powder, limestone, cement, quicklime, calcium sulfate and dry sludge as raw materials according to a mass ratio of 50: 30: 6: 8: 2: 3: 1, granulating to obtain particles of 5-8 mm, drying at room temperature for 12-24 hours, and crushing to obtain the high-temperature-sintering-free sulfur-iron compound autotrophic denitrification filler. Spraying clear water under a ventilation condition every day, and curing for 48 hours to obtain a finished product, wherein high-temperature sintering is not needed in the whole preparation process; preferably, the mass ratio of the pyrite to the sulfur is 1: 1-2: 1. The obtained filler has stable mechanical properties and adaptive bulk density, and realizes autotrophic denitrification nitrogen removal under the condition of no additional organic carbon source. The method is simple in process, low in energy consumption and material cost, and suitable for upgrading and reconstruction scenes of upflow anaerobic biofilters and constructed wetlands.

The invention provides a special compound fertilizer for rice planting and a preparation method thereof, and belongs to the technical field of fertilizers. The compound fertilizer is prepared from the following raw materials: animal waste, plant straw, sawdust, quick lime, sulfur coated urea, diammonium phosphate, potassium sulfate, compound zymophyte, cellulase, calcium hydrophosphate, zinc sulfate, borax, bentonite and a compound microbial agent. The animal waste is firstly fermented and then mixed with the inorganic components for granulation, finally, the complex microbial inoculant is sprayed at normal temperature, meanwhile, the variety and content of the inorganic components are adjusted, and only a small amount of inorganic fertilizer is added into the prepared compound fertilizer, so that the compound fertilizer can be suitable for rice planting, and the yield of rice is increased.

The application provides a composite hardness removal agent suitable for a high-hardness aqueous system and a use method thereof, and the composite hardness removal agent comprises lime, sodium sulfate, sodium sulfite and sodium carbonate. The composite hardness removal agent is suitable for a high-hardness aqueous system of a fracturing flowback fluid in an oil and gas field, can effectively avoid the risk of calcium sulfate scaling while significantly reducing the cost of the agent, realizes deep hardness removal, and can simultaneously remove dissolved oxygen, so as to solve multiple challenges such as cost, scaling, effect and system corrosion in one station.

The application discloses a lime-sulfur solution for enhancing the effect of sulfur autotrophic denitrification and phosphorus removal and application thereof, and is characterized in that sulfur and lime are mixed according to a mass ratio of 1-2:1, then the mixture is mixed with a calcium chloride-sulfide solution with a proper concentration and heated to make the sulfur basically dissolved, so as to obtain an alkaline lime-sulfur solution; the lime-sulfur solution is added into influent of a denitrification filter according to the demand of denitrification and phosphorus removal, dissolved reduced sulfur is used as an electron donor of autotrophic denitrification, and calcium ions are used as a precipitant for phosphorus removal. In the lime-sulfur solution prepared by the application, the dissolved sulfur added into wastewater promotes the electron transfer between sulfur and microorganisms, the alkalinity of the lime-sulfur solution helps to neutralize the sulfur autotrophic acid production and stabilize the pH value at 8-9, and promotes the growth of hydroxyapatite and the removal of phosphorus.

The present application belongs to the field of metallurgy, and particularly relates to a method for improving the vanadium leaching rate of vanadium-titanium iron concentrate acid leaching. The vanadium-titanium iron concentrate and hematite powder are pretreated by high-pressure roller grinding, mixed with slaked lime and calcium sulfate, and then pretreated by wet grinding and balling. The vanadium-titanium iron concentrate alkaline pellets are prepared by preheating and roasting. The pellets are subjected to dilute acid leaching to obtain a vanadium-containing mother liquor for vanadium recovery. The addition amount of hematite powder is 4.5-11% of the mass of the vanadium-titanium iron concentrate, the addition amount of slaked lime is 1-5% of the mass of the vanadium-titanium iron concentrate, and the addition amount of calcium sulfate is 0.5-3.0% of the mass of the vanadium-titanium iron concentrate. The present application avoids the use of bentonite in the pellet preparation process, and simultaneously strengthens the oxidation of vanadium oxides in the calcification roasting process, optimizes the pellet porosity, and thus significantly improves the vanadium leaching rate of the vanadium-titanium iron concentrate roasted pellets. The present application is simple and controllable, has a high vanadium leaching rate and a low other impurity leaching rate, and is convenient for industrial application.

The invention provides a composite hardness removing agent suitable for a high-hardness water-based system and a use method of the composite hardness removing agent. The composite hardness removing agent comprises lime, sodium sulfate, sodium sulfite and sodium carbonate. The composite hardness removal agent is suitable for a high-hardness water-based system of oil and gas field fracturing flow-back fluid, can effectively avoid the risk of calcium sulfate scaling while remarkably reducing the agent cost, realizes deep hardness removal, and can synchronously remove dissolved oxygen, so that multiple challenges such as cost, scaling, effect and system corrosion are solved in a one-stop manner.

The invention belongs to the technical field of pesticides, and particularly relates to the technical field of pesticide compounding, in particular to a synergistic acaricidal composition. The synergistic acaricidal composition comprises an active compound (A), a compound shown in a formula Ia (formula Ia) and at least one active compound (B), and the active compound (B) is selected from the group consisting of chlorfenapyr, phoxim, dimethoate, pyridazinofos, carbosulfan, amitraz, lambda-cyhalothrin, lime sulfur, sulfur, chlorpyrifos, profenofos, lambda-cyhalothrin, triflumizone, Sulfiflumin, Spirobudifen, Mivorisaner, Modoplaner, Tigolaner, Umifoxolaner and Flupentifenox. The weight ratio of the active compound (A) to the active compound (B) is (1: 100)-(100: 1). The synergistic acaricidal composition can effectively improve the prevention and control effect on pest mites, has a remarkable synergistic effect compared with a single agent, and can effectively reduce the use amount, reduce the use cost and reduce the influence on the environment.

The invention discloses a preparation method of a lime-sulfur mixture, and relates to the technical field of preparation of lime-sulfur mixers.The preparation method comprises the steps that S1, high-purity calcium hydroxide, sulfur powder and a compound additive composed of sea salt, loess and phyllite are prepared; s2, mixing the high-purity calcium hydroxide, sulfur powder and a compound additive in water, carrying out catalytic reaction, and stirring to react for 2.5-4 hours under the conditions that the temperature is 115-125 DEG C and the pressure is not greater than 1.5 atmospheric pressure; and S3, after the reaction is finished, cooling and filtering the reaction liquid to obtain the lime-sulfur mixture, the calcium-sulfur-mineral ternary reaction system is constructed by adopting the synergistic effect of high-purity calcium hydroxide and a composite additive with specific composition, and efficient and stable catalytic reaction is realized under mild temperature and pressure conditions, so that the generation of toxic gas is effectively inhibited, the generation of solid residues (sludge) is greatly reduced, and the environmental pollution is reduced. The problems of environmental pollution, potential safety hazards, incomplete reaction and the like in the traditional process are solved.

The invention discloses a titanium dioxide dilute sulphuric acid concentration system which comprises a first-stage concentration unit, a second-stage concentration unit and a third-stage concentration unit, the first-stage concentration unit is communicated with a first clear liquid tank, the first clear liquid tank is communicated with the second-stage concentration unit, the second-stage concentration unit is communicated with a first heat exchanger, and the third-stage concentration unit is communicated with a second heat exchanger. The first heat exchanger is communicated with the third-stage concentration unit, and the first clear liquid tank is connected with a cooling separation system. The method of the system comprises the following steps: S1, primary separation and concentration treatment; s2, primary evaporation and concentration treatment; s3, secondary evaporation and concentration treatment. According to the concentration process of the system and the process mode disclosed by the invention, material recovery of multiple products can be realized; according to the system and the process mode, dilute sulphuric acid does not need to be neutralized, and lime consumption and titanium gypsum generation are avoided; while the economic cost is saved, the site requirement of a production area can be reduced, and the pressure of surrounding markets on treating titanium gypsum according to the consumption capacity of lime, sulfuric acid and steam is reduced.

The present application belongs to the field of environmental functional materials and sewage treatment technology, and particularly relates to a semi-permanent filamentous sulfur autotrophic filler for microplastic end treatment and a preparation method and application thereof. The present application provides a semi-permanent filamentous sulfur autotrophic filler, and the preparation raw materials thereof include sodium sulfide, humic acid, silicate cement, slaked lime, pyrite, municipal sewage plant sludge, chitosan, aluminum powder and water. The semi-permanent filamentous sulfur autotrophic filler has the characteristics of light weight while retaining sufficient strength, overcoming the problem of insufficient strength of the existing filler. In addition, the semi-permanent filamentous sulfur autotrophic filler can also accelerate the domestication speed and enrichment speed of sludge, promote the rapid growth of filamentous sulfur autotrophic bacteria, thereby improving the interception capacity of filamentous sulfur autotrophic bacteria on microplastics, and further improving the denitrification capacity of microorganisms, which can effectively remove a large amount of fine microplastics remaining in the municipal sewage plant, and has a wide application prospect.

The present invention discloses a composite biomass carbon source and sulfur source denitrifying agent, as well as its preparation and application. The denitrifying agent comprises a biomass carbon source composed of crude glycerol and growth factors with a COD of 1.1 million to 1.2 million mg / L, and calcium polysulfide, prepared by boiling quicklime, sulfur, and water in a mass ratio of 1:(2-4):(10-12) and a COD of 600,000 to 700,000 mg / L. This denitrifying agent couples heterotrophic denitrification with autotrophic denitrification, combining their respective advantages to achieve efficient denitrification in water pollution control. Under a COD / TN ratio of 1, both the nitrate reduction rate and total nitrogen removal efficiency can reach over 90%. Furthermore, no ammonium nitrogen and nitrite accumulation is observed in the treated water, and sulfate generation is approximately 70 mg / L, both meeting national surface water discharge standards. The composite biomass carbon source and sulfur source denitrifying agent of the present invention is a biodenitrifying material that is non-secondary-pollution, environmentally friendly, low-cost, and easy to prepare.

This invention discloses an integrated pest management method for wolfberry diseases and pests. Based on the life cycle, damage cycle, and survival characteristics of major local wolfberry pests, this method implements a seven-step integrated control approach according to seasonal sequence: mid-February pruning and cleaning of materials for harmless disposal; early March and late October orchard cleanup followed by spraying lime sulfur to control overwintering pest populations; and targeted spraying of compound pesticide solutions in March, May, June, and August, simultaneously addressing pest and disease control, enhancing plant resistance, and providing nutritional supplementation. Furthermore, the method optimizes pesticide formulation and application, achieving a closed-loop control system. This invention innovatively proposes the addition of plant growth regulators to pesticides to induce increased pest resistance in wolfberry, and the addition of nutrient solutions to enhance pest resistance. This invention is highly targeted, uses less pesticide, effectively improves the overall pest and disease control effect of wolfberry, ensures wolfberry quality meets zero pesticide residue standards, and is suitable for wolfberry cultivation in Jiuquan and similar climatic regions, providing technical support for the high-quality development of the wolfberry industry.

This invention provides a flotation method for high-sulfur, muddy copper ore. First, the ore to be processed is pre-screened and classified. Then, only the larger particles are ground to reduce mud formation during grinding. Next, a copper-preferential process is performed. A pyrite composite depressant is obtained by compounding lime, sodium thiosulfate, sodium dimethyl dithiocarbamate, sodium hydroxide, and citric acid in a specific ratio. Utilizing the bonding between inorganic and organic matter and the synergistic effect of the substances in the pyrite composite depressant, pyrite is suppressed to the greatest extent, achieving efficient separation of copper and pyrite. Simultaneously, middlings are mixed and regrinded instead of being directly returned to the previous process. This middlings mixing and regrinding, combined with the use of the pyrite composite depressant, enhances the efficient separation of copper and pyrite. Finally, under the action of an activator, a pyrite collector, and a frother, efficient sulfur separation is achieved, ultimately yielding two qualified products: copper concentrate and sulfur concentrate.

The invention discloses a tree trunk whitening agent with rat and rabbit damage prevention effects. The tree trunk whitening agent comprises the following components in parts by weight: 3-6 parts of lime sulfur, 3-6 parts of table salt, 1-3 parts of vegetable oil, 1-3 parts of soybean milk, 0.3-0.7 part of chili powder, 20-40 parts of quick lime and the balance of water. The trunk whitening agent has a corrosion effect on various germs, worm eggs and overwintering insect pests, and can effectively prevent animals such as rats and rabbits from biting trunks.

The invention discloses a fluorine and chlorine containing flue gas treatment method, and relates to the technical field of resource recycling. Flue gas containing fluorine and chlorine is sequentially subjected to semi-dry method defluorination, washing tower washing dechlorination and desulfurization tower desulfurization, and fluorine, chlorine and sulfur are removed step by step. The treatment process of washing tower wastewater generated by washing tower water-washing dechlorination is optimized, the procedures of neutralization and impurity removal, calcium precipitation with sodium sulfate, hardness and softening with sodium carbonate, deamination, evaporative crystallization and mother liquor drying are sequentially performed, and required chemicals such as lime and sodium sulfate can be added in a solid manner, so that a large amount of clear water is prevented from being brought in, and the evaporation load and the wastewater treatment cost are reduced. By optimizing pretreatment, designing a functional separation material and constructing a multi-section separation system, fluorine and chlorine are accurately separated and are respectively converted into industrial-grade products, and meanwhile it is ensured that purified flue gas reaches the standard to be discharged.