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53results about How to "Fully enriched" patented technology

Comprehensive recycling method for high-arsenic soot

The invention discloses a comprehensive recycling method for high-arsenic soot. The method specifically comprises the following steps that two-stage leaching is conducted on the high-arsenic soot; two-stage leaching liquid enters a cyclone electrolytic system for extracting copper, and a copper product is obtained through two-stage deep decoppering; then arsenic removal is conducted, and copper-arsenic slag and a zinc sulfate solution are obtained; the copper-arsenic slag is subjected to alkaline leaching, oxidization-crystallization, prereduction and the cyclone electrolytic technology, and simple substance arsenic is produced; lead and silver in high-pressure leaching residuals are subjected to lead conversion through ammonium bicarbonate and ammonium hydroxide, the lead is made to enter feed liquid, and a lead-containing solution is obtained after solid-liquid separation to recycle the lead; and the leaching residuals are leached through thiourea, a silver-containing solution is obtained, and silver powder is obtained through replacement. According to the comprehensive recycling method, various valuable metals in the high-arsenic soot are recycled through different techniques; and meanwhile, the techniques are combined organically, basically no waste slag or waste water or waste gas or other matter is generated from the whole system, the recycling degree is high, the techniques are advanced, the recycling rate is high, the recycling cost is low, and the comprehensive recycling method has quite remarkable environment protection significance.
Owner:浙江科菲科技股份有限公司

Biological selenium-rich fertilizer and whole course dynamic gradient method for selenium-rich purple wheat

ActiveCN102795908AAvoid toxic effectsSolve the safety problems caused by inorganic selenium residuesFertilising methodsFertilizer mixturesWheat productCrop cultivation
The invention relates to a method for producing a selenium-rich purple wheat by using a biological selenium-rich fertilizer and a whole course dynamic gradient selenium-rich method, which belongs to the crops cultivation technical field. The method is characterized in that the biological selenium-rich fertilizer is produced, and is used to prepare a selenium-rich fertilizer mother liquor, and then the selenium-rich fertilizer mother liquor is diluted to a selenium-containing fertilizer liquid with different selenium concentrations, and is affected on soil, purple wheat seeds and whole purple wheat at different growth periods. The wheat seeds enable full enrichment on the selenium element, according to the growth characteristics of the purple wheat, the selenium-containing fertilizer liquid with different gradients is used for fitting with the purple wheat growth rules during the whole growth process of the purple wheat, thereby the exogenous inorganic selenium can be conversed to plant endogenous organic selenium with high efficiency. By detecting, the selenium content of the purple wheat product provided in the invention is 0.18-0.28mg / kg, wherein the organic selenium content is 0.16-0.25mg / kg, compared with the purple wheat product which is sprayed by a single selenium-containing fertilizer liquid c in the whole process, the selenium content multiple can reach 5-7 times.
Owner:JIANGSU ACAD OF AGRI SCI

Continuous two-stage biomass nitrogen-rich pyrolytic reaction device

ActiveCN104099118ARealize continuous nitrogen-enriched pyrolysisReasonable control of pyrolysis reaction parametersProductsReagentsSupercapacitorNitrogen
The invention discloses a continuous two-stage biomass nitrogen-rich pyrolytic reaction device. The continuous two-stage biomass nitrogen-rich pyrolytic reaction device comprises an auger pre-pyrolysis reactor and a rotary type turbulence pyrolytic reactor, wherein the auger pre-pyrolysis reactor comprises a pre-pyrolysis reaction cylinder, an auger and a feed pipe, and biomass enters the pre-pyrolysis reaction cylinder through a feed pipe, utilizes the pumped-in powdery exogenous nitrogen to achieve pre-pyrolysis under the pushing action of the auger and can be output through a discharge opening at the other end of the pre-pyrolysis reaction cylinder; the rotary type turbulence pyrolytic reactor comprises a pyrolytic reaction cylinder and a turbulence rotor capable of rotating relative to the pyrolytic reaction cylinder, as well as a gaseous exogenous nitrogen lead-in pipe and a high-temperature oxygen-free heat-carrying gas lead-in pipe, and under the atmosphere of the gaseous exogenous nitrogen and the high-temperature oxygen-free heat-carrying gas, counterrotation of the turbulence rotor and the pyrolytic reaction cylinder is utilized to enable full pyrolytic reaction between pre-pyrolysis biomass raw materials and nitrogenous gas so as to realize two-stage pyrolysis to produce multi-phase products. According to the invention, two-stage introduction of the exogenous nitrogen is utilized to manufacture nitrogen-rich oil and nitrogen-rich coke which can be respectively used for synthesizing high-quality chemicals and preparing high-performance super capacitors.
Owner:HUAZHONG UNIV OF SCI & TECH +1

Denitrification technology for printing and dyeing wastewater

The invention discloses a denitrification technology for printing and dyeing wastewater. The technology comprises steps as follows: step 1, a denitrification system for the printing and dyeing wastewater is established and comprises an anaerobic hydrolysis tank, a low-oxygen tank, an aerobic tank and a denitrification filter which communicate with one another sequentially; step 2, the to-be-degraded printing and dyeing wastewater enters the anaerobic hydrolysis tank from a water inlet of the anaerobic hydrolysis tank, 5%-10% of sewage after hydrolysis directly enters the denitrification filter, and residual sewage flows into the low-oxygen tank; step 3, the sewage flows into the aerobic tank for denitrification treatment via the low-oxygen tank, residual sludge produced by the aerobic tank and a nitrification liquid flow back to the anaerobic hydrolysis tank in the ratio being 25%-35%, and the residual nitrification liquid flows into the denitrification filter; step 4, a sludge and water mixture obtained through backwashing by the denitrification filter also flows back to the anaerobic hydrolysis tank in the ratio being 15%-25%, and residual sewage is discharged out of the system after denitrification filtration. The technology has the advantages of good treatment effect, low sludge yield, small occupied area of the system and low operation cost.
Owner:HOHAI UNIV

Method for extracting selenium and tellurium from pyrometallurgy smelting soot

The invention relates to a method for extracting selenium and tellurium from pyrometallurgy smelting soot, and relates to a method for extracting selenium and tellurium from pyrometallurgy smelting soot collected by a dust collection system in the pyrometallurgy treatment process of copper anode slime. The method is characterized by comprising the following steps: (1) adding water to the pyrometallurgy smelting soot for slurrying and dissolution, filtering to obtain a seleninic acid solution, and extracting crude selenium through direct reduction; (2) adding a sodium hydroxide solution to filter residues to leach selenium and tellurium, and filtering again; (3) adding sulfuric acid to a filtrate, regulating the pH value to obtain a selenium-containing filtrate to extract crude selenium through reduction, and extracting tellurium by using tellurium-rich filter residues as a raw material. According to the method provided by the invention, the direct recovery rates of extracting selenium and tellurium from the soot are 95% and 80% respectively, and the crude selenium contains more than 93% selenium, and the tellurium-rich residues contain more than 50% of tellurium after reduction. In addition, the soot from which selenium and tellurium are recovered is fully enriched in precious metal elements, the grade reaches about 15%, and the soot can be mixed with the copper anode slime to be dried and then treated by pyrometallurgy.
Owner:JINCHUAN GROUP LIMITED

Technology for extracting and purifying naphthalene from coal tar

The invention relates to a deep processing technology for coal tar, and specifically relates to a technology for extracting and purifying naphthalene from the coal tar. The technology solves the technical problems of utilizing efficiency of the coal tar and purifying and deep processing of the naphthalene, so the technology for extracting and purifying the naphthalene from the coal tar is provided. The technology comprises an alkali washing step, dephenolizing the naphthalene distillation oil through the alkali washing step, and a dehydrating step, heating the material to a temperature between 210-215 DEG C and inputting the material into a primary distillation tower, preliminarily separating the raw material in the primary distillation tower, letting phenol oil to overflow from the top of the primary distillation tower and to enter a condenser for cooling followed by entering an oil-water separator for separating of the water, obtaining the phenol oil and inputting the phenol oil to the primary distillation tower again, letting the naphthalene oil and wash oil fraction distillated from the primary distillation tower to flow to a storage tank at the bottom of the primary distillation tower, and inputting a portion of the oil to a tube heating furnace of the primary distillation tower for heating and returning back to the bottom of the primary distillation tower after the oil is heated; inputting the rest of the oil into a rectifying tower, circulatingly heating the oil in the rectifying tower and a tube heating furnace of the rectifying tower to keep the oil at a temperature of 215-220 DEG C, letting gas naphthalene to overflow from the top of the rectifying tower and to pass through a heat exchanger and a condenser to become a liquid state naphthalene oil, and filling the oil into a collecting groove and sending the oil to a crystallization technology section for processing.
Owner:段伦虎

Biological selenium-rich fertilizer and whole course dynamic gradient method for selenium-rich purple wheat

ActiveCN102795908BAvoid toxic effectsSolve the safety problems caused by inorganic selenium residuesFertilising methodsFertilizer mixturesWheat productCrop cultivation
The invention relates to a method for producing a selenium-rich purple wheat by using a biological selenium-rich fertilizer and a whole course dynamic gradient selenium-rich method, which belongs to the crops cultivation technical field. The method is characterized in that the biological selenium-rich fertilizer is produced, and is used to prepare a selenium-rich fertilizer mother liquor, and then the selenium-rich fertilizer mother liquor is diluted to a selenium-containing fertilizer liquid with different selenium concentrations, and is affected on soil, purple wheat seeds and whole purple wheat at different growth periods. The wheat seeds enable full enrichment on the selenium element, according to the growth characteristics of the purple wheat, the selenium-containing fertilizer liquid with different gradients is used for fitting with the purple wheat growth rules during the whole growth process of the purple wheat, thereby the exogenous inorganic selenium can be conversed to plant endogenous organic selenium with high efficiency. By detecting, the selenium content of the purple wheat product provided in the invention is 0.18-0.28mg / kg, wherein the organic selenium content is 0.16-0.25mg / kg, compared with the purple wheat product which is sprayed by a single selenium-containing fertilizer liquid c in the whole process, the selenium content multiple can reach 5-7 times.
Owner:JIANGSU ACAD OF AGRI SCI

Phenol-containing wastewater treatment method

The invention relates to a phenol-containing wastewater treatment method, which adopts liquid membrane extraction to treat phenol-containing wastewater, and comprises the following steps: 1, measuring the phenol content in the phenol-containing wastewater, adding a liquid membrane extract according to the measured phenol content, and fully mixing the liquid membrane extract and the phenol-containing wastewater at a stirring speed of 60r/min, reacting phenol in the phenol-containing wastewater with sodium hydroxide in the liquid membrane extraction liquid for 10 min; 2, performing standing for 10 min after the reaction is completed, layering a water phase and an emulsion phase, and separating the water phase from the emulsion phase to obtain an emulsion containing sodium phenate; and 3, stirring the emulsion containing sodium phenate obtained in the step 2 at a stirring speed of 1500r/min for 3-10min for demulsification, performing standing for 20min after demulsification is completed, layering a water phase and an oil phase, separating the oil phase from the phase, and continuing to use the oil phase as a preparation raw material of the liquid membrane extraction liquid. According to the method, phenolic compounds in the wastewater can be effectively enriched into the emulsion, the extraction liquid can be repeatedly used, the extraction efficiency is high, the energy consumption is low, and resources can be effectively saved while wastewater treatment reaches the standard.
Owner:禹城京都新材料科技有限公司

Method for extracting phosphorus element from sewage sludge

ActiveCN112678790ASolve technical problems with low recovery ratesGood for pickling and leachingPhosphorus compoundsSludgeDivalent metal ions
The invention relates to the field of sewage sludge recycling, in particular to a method for extracting phosphorus from sewage sludge. The method sequentially comprises the following steps of: S1, a dehydration step: obtaining a mud-water mixture with the water content of 75-95%; S2, an aluminum salt treatment step: adding an aluminum salt into the mud-water mixture to obtain a reaction system; S3, a hydrothermal reaction step: carrying out hydrothermal reaction on the reaction system, and then carrying out solid-liquid separation to obtain a solid component; S4, an acid pickling step: performing dilute acid pickling on the solid component and collecting leachate; and S5, a phosphorus element recovery step: adding divalent metal ions into the leachate to obtain a phosphorus-containing solid substance. With the method provided by the technical schemes of the invention, the technical problem that the recovery rate of the phosphorus element is not high can be solved; the recovery rate of the phosphorus element can reach 90% or above through the extraction method; the method has a wide application prospect; the problem that phosphorus resources face an exhaustion crisis in the world can be solved; and the method caters to the current advocated sustainable development strategy.
Owner:CHONGQING TECH & BUSINESS UNIV
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