58results about How to "Has recycling value" patented technology

The invention discloses a deep treatment method for cyanide-containing waste water of a tailings pond in the gold industry. The process adopts an ozone oxidation method, a catalytic oxidation method and a biological treatment method to collectively deeply treat the cyanide-containing waste water of the tailings pond in the gold industry. Through the combination of the three methods, a good treatment effect on the cyanide, thiocyanate, arsenic and heavy metals is good, the content of the cyanide after being treated is less than or equal to 0.05mg/L, the content of ammonia and nitrogen after being treated is less than 1mg/L, and other pollutants after being treated can meet the requirement of the ground surface water grade-B water quality standard. The method is used for treating the cyanide-containing waste water of the tailings pond in the gold industry, the treatment effect on the cyanide, the COD, As and heavy metals is good, the heavy metals such as the gold and silver as well as other metal resource can be recovered, and the secondary pollution caused by the ammonia and nitrogen can be avoided. By adopting the deep treatment method for the cyanide-containing waste water of the tailings pond, a good environment, a good economic benefit and a good social benefit can be achieved.

The invention relates to a heavy metal recycling method based on municipal solid waste incineration (MSWI) fly ash in the technical field of treatment for environmental protection. After an alkali solution and hydrazine substances are added to the MSWI fly ash and heated, and a water-soluble aluminum salt solution is further dripped; finally, after solid and liquid separation is conducted, heat treatment is carried out on an obtained solid phase to obtain a zeolite-active alumina compound absorbant; and the absorbant is put into sewage full of heavy metal to absorb and recycle the heavy metal. In the preparation process of the absorbant provided by the invention, dioxin in the MSWI fly ash is decomposed and removed; the MSWI fly ash is recycled as resources, and the heavy metal in the MSWI fly ash and the heavy metal in the sewage are recycled as the resources; and because the dioxin is decomposed and removed and the heavy metal is also extracted, the recycling method provided by the invention is safer and more reliable compared with the traditional treatment manner.

The invention relates to the field of wastewater treatment in environment protection, in particular to a treatment method and system for solid-containing oil-containing low-concentration heavy metal wastewater. The method comprises the steps that firstly, a separator with a deep filtering boiling bed is used for removing soil particles in the wastewater; then, a fiber coalescence filter is used for controlling and removing soil in the wastewater and oil wrapped by a micro emulsion state; finally, a heavy metal ion adsorption tower is used for deeply removing an ion-state heavy metal pollutant in the wastewater, so that water discharging reaches the related emission standard. The whole treatment system only discharges the wastewater which reaches the standard, and no other waste liquid is discharged. According to the method, the heavy metal pollutant in the solid-containing oil-containing wastewater of the industries such as oil refining, power plants and electroplating can be deeply removed, and the water quality of the discharged wastewater reaches the related emission standard.

Disclosed is a chemical nickel waste liquid integrated processing system. The chemical nickel waste liquid integrated processing system is characterized in that solid-liquid separation can be performed on chemical nickel waste liquid, and the system comprises an evaporation device, a cooling tower, a conduction oil circulating device, an electric control cabinet and an automatic control unit; the evaporation device comprises a steam-liquid separator, a feeding electric valve, an emptying valve, a heating chamber, a condenser, a water storage tank and a vacuum pump; the water storage tank is composed of a first tank body and a second tank body. The chemical nickel waste liquid integrated processing system is high in integration degree, small in occupied area and capable of safely, stably and effectively removing phosphorus, nickel and COD in chemical nickel waste liquid, no secondary pollution is generated, and the processed chemical nickel concentrated solution has the recycling value.

The invention discloses a refractory iron ore on-line closed-loop shaft furnace roasting, dry grinding and dry separation technology which comprises the following steps that oxidized refractory iron ore with the size fraction being +15 mm to -100 mm is subjected to magnetizing roasting through a shaft furnace, and the roasted ore is cooled to the normal temperature; the roasted ore is subjected to dry-type pre-separation and discarded through magnetic pulleys; after discarding is finished, the roasted ore is subjected to dry grinding and dry separation, specifically, dry grinding is conducted till the ore with the size fraction being -0.074mm accounts for 70-80%; a panel wind magnetism combination dry separator is adopted for three-stage dry-type concentration; after two-stage and three-stage tailings are enriched by a spiral dry-type magnetic separator, the enriched tailings, one-stage concentration tailings and discarded waste ore are discharged by qualified tailings, and the grade is controlled to be 10% or below; the enriched concentrate is returned to a newly-built granulating rotary kiln roasting system for closed-loop magnetizing roasting; and concentrate after three-stage concentration is final qualified concentrate, and the grade reaches 60% or above. According to the refractory iron ore on-line closed-loop shaft furnace roasting dry grinding and dry separation technology, aiming at solving the problem of the high grade of shaft furnace magnetizing roasting ore magnetic separation tailings of refractory iron ore with different size fraction ranges, iron resources in the tailings are recovered in an on-line closed-loop mode, and the resource utilization rate is increased.

The invention discloses a technology for removing mercury in contaminated acid wastewater. The method specifically comprises the following steps of pumping contaminated acid wastewater produced in a sulfuric acid dynamic wave scrubbing process into a reaction tank, adding a strong oxidant KMnO4, then adding lime milk for reaction, and then adding sodium sulphide for reaction; adding a flocculating agent, namely polyacrylamide into ore pulp after mercury removal, pumping the liquid into a plate and frame filter after the reaction to obtain filter liquor and filter residues, wherein the content of Hg in the obtained filter liquor is detected to be less than 0.03mg/L, and the content of the mercury in the filter residues is 0.264 to 20.33 percent, and collecting the filter residues. By adopting the technology provided by the invention to treat contaminated acid produced in the sulfuric acid dynamic wave scrubbing process of the lead and zinc smelting industry to remove the Hg, the wastewater discharging reaches the standard, the operation is simple and reliable, and a production field test result shows that the novel technology is feasible technically. By using the technology in production practice for two years, the problem that the Hg in the contaminated acid produced by lead and zinc smelting does not reach the standard is thoroughly solved. By adopting the technology provided by the invention to remove the mercury, the fact that the Hg of discharge water is less than or equal to 0.03mg/L is guaranteed, and a method through which the discharge reaches the standard is realized.

The invention relates to a method for treating wastewater containing polyvinyl alcohol. The method comprises the following steps: adding Fe<2+> and Fe <3+> into the wastewater containing the polyvinylalcohol, and evenly stirring, wherein the molar ratio of the Fe<2+> to the Fe <3+> is 1 to 2; then, adjusting the pH value of mixed liquid, and carrying out solid-liquid separation after a reaction is finished. Compared with the traditional polyvinyl alcohol wastewater treatment method, the method, provided by the invention, for treating the wastewater containing the polyvinyl alcohol has the advantages of high removal efficiency, short needed time and simpleness in operation, and enables final precipitate to be easily recycled.

The invention relates to an advanced treatment system and method for leather wastewater containing heavy metals, dyes and short wool fibers. The method comprises the following steps: firstly, deeply removing the short wool fibers and other impurity solid particles in the leather wastewater by using a particle bed separator; then adding a decolorizing agent to decompose dye molecules in the wastewater; then, removing solid particles generated by a decoloration reaction by using a deep interception filtering tower; and finally, carrying out in-depth removal of heavy metal chromium ions, dye molecules and fragments thereof in the wastewater by using a dual-functional adsorption tower so as to allow effluent to meet reuse requirements or related discharge standards and greatly reduce the discharge amount of chromium-containing hazardous wastes. The treatment method and system can realize synchronous deep removal of heavy metals, dyes and fibers in wastewater produced in the industries of leather, textile, printing and dyeing, papermaking and the like, effluent quality meets reuse requirements, and the effluent reaches relevant national and local discharge standards in China.

The invention belongs to the field of waste liquid recycling, and provides a method for recycling a zinc ferrite solution. According to the method, hydrogen peroxide or ozone is added into the zinc ferrite solution, so that the hydrogen peroxide or ozone and metal in the zinc ferrite liquid form Fenton and a Fenton-like reaction to generate OH., and low-valent iron ions in the zinc ferrite solution are oxidized into ferric ions while various organic matters in the zinc ferrite liquid are oxidized. The ammonia water is added to adjust the pH value, ferric ions are made to generate ferric hydroxide, and finally iron mud is obtained through precipitation. The steps of stirring and washing are carried out on the iron mud by adopting a hydrochloric acid solution, zinc ions are washed, and the iron mud is purified, so that the iron mud has a certain recovery value, and meanwhile, zinc lost due to mud-water separation is reduced. The recycled water composed of a supernatant and the washing liquid meets the requirement for matching and recycling of the plating assistant agent, and discharging is not needed. Therefore, according to the method for recycling the zinc ferrite solution, zinc recycling is achieved, iron mud is recycled, and two purposes are achieved at a time.

The invention provides a construction method of replacing a sealing-tape machine concrete gallery in a gravel system with a corrugated pipe. The construction method comprises the following steps of construction preparation, ditch excavation, foundation treatment, corrugated pipe assembly, pipeline linear laying, backfill, reinforcement of a discharging opening and a pneumatic segment gate, backfill of pipe body top and load test and completion test. The construction method has enough strength and tenacity, so that certain material accumulation load and foundation settlement deformation can be borne; the assembly construction period is short; the construction method is not limited by climate conditions; prefabricated semi-products produced by factories are assembled on site, so that construction site occupation is small; backfill can be rapidly performed after assembly to form a material bin platform; the construction method is not limited by the coagulation period of concrete; a site can be provided for other operation in advance; operation personnel are fewer; used transfer materials are fewer; construction cost is low; and after construction is finished, the metal corrugated pipe can be recycled for repeated utilization, so that a certain recycle value is provided.

The invention discloses a resin glass fiber formulation and a flowerpot made thereby. The resin glass fiber formulation comprises the following components in part by weight: 80-95 parts of resin glass fiber powder and 5-20 parts of epoxide resin, wherein the resin glass fiber powder has the copper content of smaller than 5%. The resin glass fiber flowerpot is made from the following components in part by weight: 80-95 parts of resin glass fiber powder and 5-20 parts of epoxide resin, wherein the resin glass fiber powder has the copper content of smaller than 5%. Due to characteristics of the resin glass fiber powder, the flowerpot made from the resin glass fiber powder as a raw material has the characteristics of water resistance, corrosion resistance, moth resistance, acid and alkali resistance, aging resistance, light weight (compared with a clay flowerpot), low probability of breakage and the like; and a small amount of heavy metal exists in the resin glass fiber powder, so that during slow release of the heavy metal, the color and luster of a flower can be more bright and beautiful and the flowering phase can be prolonged.

The invention discloses a hydrothermal treatment device and method for waste plastics. The hydrothermal treatment device comprises a hydrothermal oxidation system, a high-pressure hydrolysis system, awaste plastic smashing system, a mixture pumping system and an oxidizing agent pumping system, wherein the hydrothermal oxidation system is used for performing partial oxidation reaction on the wasteplastics; the high-pressure hydrolysis system is used for further hydrolyzing a product obtained after the oxidation reaction performed by the hydrothermal oxidation system; the waste plastic smashing system is used for smashing the waste plastics and conveying the smashed waste plastics to the hydrothermal oxidation system; the mixture pumping system is used for pumping a water and mother liquormixture to a first preheating system from a first high-pressure pumping system and conveying the preheated mixture to the hydrothermal oxidation system; the oxidizing agent pumping system is used forpumping an oxidizing agent to a second preheating system from a second high-pressure pumping system and conveying the preheated oxidizing agent to the hydrothermal oxidation system. According to thedevice and the method for adopting water as a degradation agent to perform partial oxidation and hydrolysis treatment sequentially under high temperature and high pressure conditions, the waste plastics can be degraded in the relatively simple hydrothermal system.

The invention relates to a method and a device for recovering ammonia nitrogen from oxidative dehydration catalyst preparation wastewater. The method comprises the following steps: high-concentration wastewater produced in oxidative dehydration catalyst preparation is treated with gaseous carbon dioxide, such that zinc ions form a precipitate, zinc ammonia complex ion-form ammonia nitrogen is converted into ammonium ion ammonia nitrogen, and metal ion impurities are removed; the precipitate is dissolved with nitric acid, and the solution is used as a catalyst preparation raw material; when the weight concentration of the original ammonium nitrate ammonia nitrogen of the high-concentration wastewater and the newly formed ammonium ion ammonia nitrogen reaches 2-6%, alkali is added, such that ammonium salt is converted into ammonia water; with a distillation method, ammonia water is recovered from the top of a distillation tower; the ammonia water with mass concentration higher than 10% is recycled in the catalyst preparation process; in the wastewater obtained at the bottom of the distillation tower, the ammonia nitrogen content is no higher than 50mg/L, and the mass concentration of sodium nitrate is higher than 5%, such that recycling is convenient. With the method provided by the invention, zinc ions can be precipitated, and ammonia nitrogen existing in a form of zinc ammonia complex ion can be converted into ammonium ion ammonia nitrogen. Therefore, a problem of incomplete precipitation caused by that zinc ion precipitation is influenced by zinc ammonia complex ion balance when sodium carbonate is adopted as a precipitation agent is solved.

The invention discloses a treatment method of dyestuff wastewater containing heavy metals. The method comprises under a stirring condition, adding Fe<2+> into to-be-processed dyestuff wastewater which contains heavy metals and adjusting the pH value to a range of 4-10, performing a reaction for 1-15 min, and performing solid-liquid separation. The method provided by the invention requires an extremely short time for treating the dyestuff wastewater, and can rapidly reach a goal of removal. The method uses a ferrite method for metallic oxide generation, and can effectively remove dyestuffs and the heavy metals in the wastewater at the same time. The generated metallic oxides have a certain recovery value, so that costs can be recovered and resource recovery and reuse can be realized. The purity requirement of Fe<2+> used by the method is not high, and heavy metal wastewater which is rich in Fe<2+> can be used to replace added ferrous salts to realize using waste to treat waste, so that treatment cost is reduced greatly. The method has a very simple reaction condition, can be performed at normal temperature under a common pressure, and has a simple and convenient operation.

The invention belongs to the technical field of lithium batteries and provides a simple, convenient and efficient boron oxide coated high-nickel ternary positive electrode material and a preparation method thereof. In a preparation process, liquid pentaborane is added; and the liquid pentaborane is easy to directly and fully mix with a material, the problem that a solvent needs to be treated in wet coating is not required to be considered; the pentaborane can be quickly hydrolyzed to release heat when meeting water on the surface of the material, so that an oxide coating layer can be formed inan extremely short time; long-term sintering is not needed, and therefore, production efficiency is improved; the surface temperature of the material can be increased to meet a coating requirement when the boron oxide coating layer is formed, and therefore, a user does not to worry about insecure coating caused by insufficient temperature; and in addition, the boiling point of the pentaborane isonly 60 DEG C, the pentaborane which does not participate in a reaction is in a gaseous state when the reaction is finished, and therefore, the pentaborane is very easy to separate and recover from the material, and reaction byproduct hydrogen also has a recovery value.

The invention discloses an ultraviolet-resistance Song brocade fabric and a preparation process thereof. The fabric comprises a surface layer and an inner layer, the surface layer is formed by the weft-and-warp interweaving of natural mulberry silk yarns, the inner layer is formed by the weft-and-warp interweaving of ultraviolet-resistance polyester staple fiber yarns, and the ultraviolet-resistance polyester staple fiber yarns are formed by the spinning of ceramic fine powder doping with polyester polymer, wherein the surface layer and the inner layer are connected by connecting weft yarns through uniformly arranged interweaving points. The ultraviolet-resistance Song brocade fabric has higher ultraviolet shielding rate.

The invention belongs to the technical field of heating equipment, and relates to a plasma hot-blast stove and a gas recycling device based on the plasma hot-blast stove. The plasma hot-blast stove comprises a stove body and plasma generators arranged on a stove body shell; the plasma generators communicate with an inner cavity of the stove body, and a temperature-adjusting gas source inlet and a hot air outlet are formed in the stove body; starting gas source inlets communicating with the inner cavity of the stove body are formed in the plasma generators; and the starting gas source inlets communicate with a starting gas source pipeline. The gas recycling device based on the plasma hot-blast stove comprises the plasma hot-blast stove and an industrial kiln. The industrial kiln is connected with the hot air outlet and is connected with the temperature-adjusting gas source inlet and the starting gas source inlets through a cooling and purifying device. The equipment is high in thermal power, high in output temperature and wide in gas source selection range, and the production cost is reduced; a production system is high in gas content and has recovery value; and the heat source temperature is controllable, gas is recycled, and resources are saved.

The invention provides a fully-automatic and continuous chemical nickel liquid waste treatment system. The fully-automatic and continuous chemical nickel liquid waste treatment system is characterized in that the chemical nickel liquid waste treatment system can conduct solid-liquid separation on chemical nickel liquid waste and comprises evaporation equipment, a cooling tower, heat conduction oil circulation equipment and an automated control unit; the evaporation equipment comprises a vapor-liquid separator, a feeding electric valve, an emptying valve, a first heating chamber, a second heating chamber, concentrated liquid discharge valves, a condenser, a water storage tank and a vacuum pump; in the work state, the first heating chamber and the second heating chamber work by turns and do not work simultaneously; the water storage tank is composed of a first tank body and a second tank body; the heat conduction oil circulation equipment comprises a heating groove and a heat conduction oil circulation pump; the automated control unit comprises a heat conduction oil heating control module, a temperature sensor, a feeding control module, a first sensor, a condensate water discharging control module and a second sensor. By means of the chemical nickel liquid waste treatment system, phosphorus, nickel and COD in chemical nickel liquid waste can be effectively removed.

The invention discloses a regenerated garbage bag prepared from waste plastics and a preparation method thereof. The garbage bag is prepared from the following materials in parts by mass: 30-70 parts of regenerated high-density polyethylene; 0-40 parts of high density polyethylene; 0-20 parts of regenerated low density polyethylene; 0-20 parts of low density polyethylene; 10 -30 parts of linear low density polyethylene; 0-8 parts of color master batch; and 1-5 parts of an opening master batch. The regenerated garbage bag is prepared from the waste plastics in the household garbage, so that the recycling of waste plastic resources is realized, the problems of plastic pollution and plastic resource consumption can be solved to a certain extent, and certain environmental friendliness is realized; and meanwhile, the waste plastic raw materials are wide in source and low in price, so that the cost is low and the waste plastic raw materials are easily accepted by the market when used for preparing regenerated garbage bags.

The invention discloses an in-situ remediation system and method for groundwater polluted by perfluorinated compounds, the system comprises a plurality of groundwater wells and an overground remediation device, and a plurality of water inlets are formed in the well walls of the groundwater wells located in the area below the groundwater level; a chemical injection pipe, an aeration pipe and a foam extractor which are connected with the overground repairing device are further arranged in the underground water well, the lower portion of the aeration pipe is inserted below the underground water level, and the foam extractor is arranged on the underground water surface in a floating mode and conveys collected foam into the overground repairing device; the method comprises the following steps: quantitatively injecting a surfactant with high affinity with a perfluorinated compound into each underground water well; aeration is conducted on underground water through the aeration pipe, and foam is formed at the water level of the underground water well; foam is collected by the floating foam extractor and pumped into the overground repairing device to be processed into liquid, a large amount of underground water does not need to be pumped, disturbance to the environment is small, energy consumption is small, a large amount of auxiliary facilities and processing materials are omitted, and cost is greatly reduced.

The invention discloses a waste gas treatment system for VOCs recovery. An adsorption technology, a membrane separation technology and a condensation combination technology are applied; a membrane separation technology is innovatively applied to treat desorbed gas of adsorption equipment; by exerting the concentration effect of membrane separation on VOCs components, not only is the recovery of VOCs by a condensation process enhanced, but also the VOCs concentration of residual gas is lower than the VOCs concentration of discharged raw material gas and is mixed with the discharged raw materialgas to enter adsorption equipment, so that the tail gas emission of the adsorption equipment more easily meets the environmental protection requirement. The adsorption equipment is double-tank type adsorbable/desorbable regeneration equipment, a vacuum desorption regeneration process replaces a traditional steam desorption regeneration process, and the problem that water-soluble VOCs are recovered into a solution and then separated is solved.