88results about How to "Compliance with emission requirements" patented technology

The invention relates to a method for continuously producing large-particle spherical cobalt carbonate. The method comprises the following steps: manufacturing a turbid liquid containing small-particle-size cobalt carbonate seed crystal and manufacturing a turbid liquid containing large-particle spherical cobalt carbonate, stirring the turbid liquid containing the small-particle-size cobalt carbonate seed crystal and the turbid liquid containing large-particle-size cobalt carbonate to form a mixed liquid, carrying out solid-liquid separation, washing and filter pressing to obtain a filter cake as a large-particle cobalt carbonate filter cake, drying the filter cake, and repeatedly operating to obtain the large-particle cobalt carbonate powder. According to the method disclosed by the invention, the small-particle-size cobalt carbonate seed crystal is adopted to control the particle size of the large-particle cobalt carbonate in reaction mother liquor, so that the degree of sphericity of cobalt carbonate produced by continuous production can be ensured to be high, the particle size can be stably controlled within the range of 15+/-0.5 microns, and the consistency and the stability of the particle size of the large-particle spherical cobalt carbonate through large-scale continuous production can be realized; the method is simple in process, easy to operate and low in cost, and can provide the high-quality raw material for producing high-end lithium cobalt oxide; the carbonate is used as a precipitant, so that the environment can be optimized; the production efficiency can be improved, and the wide application prospect can be achieved.

The invention relates to a wastewater treatment method, in particular to a high-concentration organic salt-containing wastewater treatment method adopting the steam recompression technology. The high-concentration organic salt-containing wastewater treatment method is characterized by comprising the steps of pretreatment, evaporation concentration, evaporation crystallization, crystallization separation and the like, wherein the evaporation concentration step is implemented according to the steam recompression technology: conveying wastewater into a mechanical recompression evaporator and concentrating the wastewater into a saline saturated or over-saturated solution through steam heating. According to the method, live steam is only fed into the mechanical recompression evaporator at the initial use, and the mechanical recompression evaporator can be used for recompressing secondary steam produced by wastewater evaporation, so that enough heat sources can be supplied to concentration of the subsequent fed wastewater, and the live steam is not required to be fed at the subsequent use; therefore, the energy can be greatly saved, and the treatment cost can be reduced.

The invention discloses a coal-fired flue gas denitration and desulfurization method combined with the urea wet method. The method comprises the following steps: spraying 50wt% of hydrogen peroxide at the coal-fired flue gas inlet of a absorption tower while keeping the molar ratio of H2O2 to NO to be 2-3, so as to oxidize NO in the coal-fired flue gas to NO2 and increase the oxidization degree of NOX; and perform denitration and desulfurization simultaneously by using the urea aqueous solution in the absorption tower. The method of the invention increases the denitration rate of the coal-fired flue gas denitration and desulfurization combination technology by increasing the oxidization degree of NOX and the temperature of the absorption solution. The method has simple technology, convenient operation and management, no secondary pollution and good environmental and economic benefits.

The invention discloses a gas turbine engine dry-type low-NOx combustion adjustment method. According to the analysis of the combustion situation, the method is used for adjusting the D5, PM1, PM4 of a DLN-2+ combustion system as well as a purge air control value in real time through the adjustment of control constant until the combustion dynamic pressure monitoring result and the NOx and CO emission both have appropriate values. According to the invention, the combustion of a modern gas turbine engine adopting a premixed combustion technique is optimized and adjusted; the running state of the modern gas turbine engine is improved; the running stability of the modern gas turbine engine is enhanced; the damage to the heat parts of the gas turbine engine is relieved; influences of heat value variation and environment temperature variation on the operation of the gas turbine engine are prevented.

The invention discloses a process for treating and recycling mine acid heavy metal wastewater. The process comprises the steps of collecting the mine acid heavy metal wastewater and then introducing the mine acid heavy metal wastewater into an integrated reactive precipitation system, and completing the processes of feeding chemicals, stirring, reacting, flocculating and precipitating; treating a supernatant in a reaction tank with activated carbon and then recycling as cleaning water; and concentrating sludge slurry at the lower part of the reaction tank and then forming the concentrated sludge into mud cakes for outward transportation and treatment. The mine acid heavy metal wastewater can be recycled after being treated through the process, and as a result, discharge of pollution is reduced, and the usage amount of water resources is also reduced.

The invention discloses a process for treating and recycling alkaline wastewater containing zinc and chromium ions. The process comprises the steps: introducing wastewater to an integrated sequencing batch reaction tank; then, finishing dosing, stirring, reacting, flocculating and settling processes; treating a supernatant liquid in the reaction tank by using activated carbon, and then, recycling the supernatant liquid as cleaning water; and concentrating the sludge slurry at the lower part of the reaction tank, and then, preparing the sludge slurry into mud cakes to be outwards transported and treated. The alkaline wastewater containing the zinc and chromium ions can be recycled as water after being treated by using the process provided by the invention. The process has the advantages of high efficiency, simplicity, convenience, economy, practicability and the like and can be used for simultaneously realizing economic, societal and environmental benefits.

The invention discloses a multiple-effect composite refining flux for removing impurities in aluminum and aluminum alloy melt. Raw materials of the multiple-effect composite refining flux comprise, by weight, 50%-70% of aluminum fluoride AlF3, 15%-25% of magnesium chloride MgCl2, 2%-10% of sodium borate Na2B4O7 and 1%-15% of potassium chloride KCl2. All the raw materials are dried industrial grade powder products, and the purities of all the raw materials reach 99.5% or above. After the matched raw materials are added into a ball mill for ball milling for 10-15 min, the raw materials are screened through a screen with the meshes being 100-325, and the powder mixture grain size distribution requirements are that 35%-50% of powder with the grain size being 90-125 [mu]m, 20%-25% of powder with the grain size being 60-90 [mu]m, 8%-10% of powder with the grain size being 40-60 [mu]m, and 35%-50% of powder with the grain size being smaller than or equal to 40 [mu]m. The prepared flux is packaged in a sealed mode for standby application after inspection. The multiple-effect composite refining flux provided by the invention has the good capacity for removing the metal impurities and oxide inclusion, the problem that metal impurities in the aluminum and aluminum alloy melt are over standard is solved, and the flux has the better impurity and slag inclusion removing capacity, and has the multiple effects and the multiple purposes.

The invention discloses a pretreatment technology of hot-galvanizing wastewater. The pretreatment technology comprises the following steps: introducing the wastewater into a continuous reaction precipitation system, dosing, stirring, reacting, flocculating and precipitating; and carrying out further biochemical treatment on supernatant in a reaction tank, so that after meeting discharge standards, the supernatant is discharged, and concentrating sludge slurry at the lower part of the reaction tank so as to prepare sludge cakes, externally transporting the sludge cakes and treating. After the hot-galvanizing wastewater is treated by the pretreatment technology, zinc ions and phosphate radical ions meet the discharge standards, the COD (Chemical Oxygen Demand) value is substantially reduced, and the pressure of an organic load of a follow-up biochemical treatment system is greatly reduced; the pretreatment technology of the hot-galvanizing wastewater is high-efficiency, reliable, economic and practical.

The invention discloses a phenol water treatment technology of gas furnace and device in waste water disposal domain, which is characterized by the following: proceeding heat exchange with air and lower branch gas; touching with atomized phenol water; evaporating the phenol in the phenol water; burning the phenol; making the device comprise two-section coal-gas producer and phenol water pool; equipping with cyclone saturation tower, shell-and-tube heat exchanger, air pump and phenol water pump. This craft and device possess the advantages of energy-saving and environment protection, which can diminish the pollution for environment.

Besides magnesium chloride 15-30%, potassium chloride 15-30%, calcium fluoride 10-20%, barium chloride 8-12% and magnesium fluoride 10-25% etc. the chemical constituent of fusing agent has titanium compound 10-20% and carbonate 1-10% being added. Magnesium chloride and potassium chloride etc. is added into the warmed up crucible. With the magnesium chloride etc. being melted, calcium fluoride andmagnesium fluoride is added to the crucible. The fusing agent is made through procedures of heating up, stirring and pouring in bulk, then the procedures of crushing, milling and sifting out as well as with titanium compound and carbonate being added. The invented magnesium alloy provides the advantages of remarkable effect of removal of silica and excellent deslagging performance as well as improving mechanical property and corrosion-resisting properties.

The invention discloses a horizontal enameling machine drying oven with a superwide furnace which comprises furnace and heat irradiation equipment arranged in the furnace, wherein, the upper part of the furnace is provided with a catalytic combustor and a catalytic post suction and discharge room which are communicated. Two ends of the catalytic combustor are provided with an air inlet and an air outlet, a heat exchange room is arranged on the periphery of the catalytic post suction and discharge room, and the furnace is separated from a solvent suction and discharge area in the middle. The horizontal enameling machine drying oven is characterized in that more than two air inlets are arranged in the solvent suction and discharge area and the air inlet of the catalytic combustor is respectively communicated with the air inlets at the ends of the furnace and in the solvent suction and discharge area. A multi-channel air-flow distribution device is arranged in the catalytic post suction and discharge room and comprises a solvent distillation channel, the left and right sides and the back end of the channel are all provided with stream inlets, and the middle part thereof is provided with an air flow demarcation strip; and a pump line provided with an exhaust fan is arranged on the periphery of the air flow demarcation strip and communicated with the solvent distillation channel. The horizontal enameling machine drying oven has reasonable structure, uniform airflow direction and temperature, energy conservation and environmental protection, and good popularization value.

The invention belongs to the technical field of water treatment and discloses an ozone oxidation water treatment method with high-specific-area hydroxyl iron oxide as a catalyst. The method includes:(1) continuously feeding ozone into sewage; (2) feeding the sewage treated in the step (1) into a fixed bed reactor filled with hydroxyl iron oxide. The method for water treatment through ozone oxidation catalyzed by hydroxyl iron oxide has advantages that by feeding the sewage continuously fed with ozone into the fixed bed reactor filled with hydroxyl iron oxide, organic pollutant components andozone in water can be completely contacted with the catalyst while a step of catalyst separation is saved, so that COD (chemical oxygen demand) removal efficiency can be improved while treatment procedures are simplified, and large-scale continuous water treatment requirements can be met.

The invention provides a treatment method of cotton pulp wastewater. The treatment method comprises the following steps of: a) providing flocculated cotton pulp; and b) mixing the cotton pulp obtained in step a) with chlorine dioxide for decolorizing treatment. According to the treatment method, a decolorizing agent adopted in the decolorizing treatment is chlorine dioxide which has great discoloring effect on the cotton pulp wastewater, is fast to react, and has relatively high sterilizing effect so that the discharged water which is subjected to discolored by chlorine dioxide has good purification effect on the water quality in the downstream, and has environment-friendly effect; in addition, during discoloring, the chlorine dioxide also can reduce the COD (Chemical Oxygen Demand) of the wastewater, and reduces the comprehensive treatment cost. The chlorine dioxide is fast in discoloring speed and great in discoloring effect, so that a Fenton reactor and a reaction tank are not need to be added in the discoloring process, and as a result, the cost of facility instrument is greatly decreased.

The invention provides water-based transparent polyurethane, water-based UV curing gloss oil, water-based UV curing ink and a preparation method thereof. The water-based transparent polyurethane is prepared from the following raw materials in parts by weight: 30-50 parts of isophorone or diisopropylketone, 5-20 parts of diisocyanate, 80-120 parts of polyester polyol, 1-3 parts of 2, 2-dimethylolpropionic acid, 10-30 parts of neopentyl glycol and 5-30 parts of C7-C22 alkanediol. Isophorone and diisopropylketone not only can be used as reaction monomers, but also can be used as solvents, have high dissolvability to diisocyanate, and are miscible with water, so that the generated prepolymer can form a uniform dispersion in water. 2, 2-dimethylolpropionic acid not only can be used as a chain extender, but also can enable polyurethane to obtain a self-emulsifying property, so that the self-emulsifying water-based polyurethane with excellent stability can be prepared in an internal emulsification manner. Under the action of isophorone, diisopropylketone, neopentyl glycol and alkanediol, a polyurethane aqueous dispersion which is uniformly dispersed can be generated, and the polyurethaneaqueous dispersion has high refractive index and aqueous solution stability.

The invention relates to a urea solution for a vehicle and a preparation method thereof, belonging to the technical field of treatment of automobile exhaust. The urea solution for the vehicle comprises, by weight, 30-40 parts of urea, 60-80 parts of high-purity water, 12-18 parts of cocamidopropyl betaine, 15-20 parts of an amido carboxylate type gemini surfactant, 3-4 parts of polyvinylpyrrolidone, 1-3 parts of an alcohol derivative of phenols and 5-8 parts of polyepoxysuccinic acid. The preparation method comprises the following steps: (1) mixing urea with high-purity water under stirring soas to obtain a mixed solution, allowing the mixed solution to pass through a filter so as to remove impurities, and then removing metal ions in the mixed solution through an ion exchange resin columnso as to obtain a urea solution; and (2) mixing the urea solution prepared in the step (1), cocamidopropyl betaine, the amido carboxylate type gemini surfactant, polyvinylpyrrolidone, the alcohol derivative of phenols and polyepoxysuccinic acid under stirring and then carrying out filtering so as to obtain the urea solution for the vehicle.

In order to reduce the high cost generated in the shaping process of preparing a carbon fiber reinforced high-temperature composite material by adopting a chemical vapor deposition process, the invention provides a rapid shaping method of a carbon fiber preform. The method comprises the steps of S1, impregnating the carbon fiber preform in a resin impregnation liquid for the first time; S2, carrying out air-drying shaping on the resin-impregnated carbon fiber preform for the first time; S3, carrying out second-time impregnation on the carbon fiber preform subjected to the first-time shaping in the resin liquid; and S4, carrying out secondary air-drying shaping on the carbon fiber preform subjected to secondary impregnation.

The invention discloses a recovering method for a vanadium catalyst in pigment wastewater, and belongs to the technical field of the vanadium catalyst recovery. The method comprises the following steps: (1) pre-processing: adding a precipitant to the pigment wastewater containing the vanadium catalyst and generating a precipitate and supernatant fluid, wherein the precipitant is inorganic acid; and (2) adsorption-processing: after adsorbing through feeding the supernatant fluid into an adsorption device, to obtain effluent, wherein the adsorption device is internally provided with an adsorption material. The method is used for processing the inorganic ceramic pigment wastewater and recovering the vanadium catalyst in the wastewater, the effluent is in comply with requirements of national standard emission, and can be directly discharged, and recovered vanadium can be reused for ceramic pigment production.

The invention discloses a treatment system and treatment method for distillation mother liquor of CMC wastewater. The treatment system comprises a storage tank, a regulating tank, a primary sedimentation tank, a biochemical tank, a secondary sedimentation tank and a ternary sedimentation tank which are successively arranged along the flow direction of the distillation mother liquor of CMC wastewater, wherein the outlet of the storage tank is communicated with the inlet of the regulating tank; the outlet of the regulating tank is communicated with the inlet of the primary sedimentation tank; the outlet of the primary sedimentation tank is communicated with the inlet of the biochemical tank; the outlet of the biochemical tank is communicated with the inlet of the secondary sedimentation tank; the outlet of the secondary sedimentation tank is communicated with the inlet of the ternary sedimentation tank; the outlet of the ternary sedimentation tank is communicated with the outside; and aninfusion pump and a flow meter for controlling the flow of the distillation mother liquor of CMC wastewater are arranged between the storage tank and the regulating tank. The treatment system also comprises a sludge tank which is separately communicated with the primary sedimentation tank, the secondary sedimentation tank and the ternary sedimentation tank; a part of liquid and sludge in the secondary sedimentation tank flow back into the primary sedimentation tank and into the biochemical tank; and a part of liquid and sludge in the ternary sedimentation tank flow back into the primary sedimentation tank. The system overcomes the problem of secondary pollution after the distillation of CMC wastewater and realizes effective usage of the distillation mother liquor of CMC wastewater.