235results about How to "Achieve pollution" patented technology

The invention relates to a synthesized recovery method for waste positive plates of iron phosphate lithium batteries. The method comprises the following steps: collected waste positive plate material is mechanically crashed into fragments; the fragments are positioned in a welding furnace which is protected by vacuum atmosphere, inert gases and/or reducing gases and/or nitrogen and are heat processed in the temperature of 150-750 DEG C; aluminum foil basal bodies are separated from the fragments after heat process by adopting mechanical separation or ultrasonic concussion to obtain a mixture of iron phosphate lithium positive material, conduction agent and caking agent giblets; the mixture of iron phosphate lithium anode material, conduction agent and caking agent giblets is roasted for 8-24 hrs in 80-150 DRG C; the mixture after roasting is classified to control the grain diameter of the powder material to be not more than 20 microns, and the D50 is controlled to be 3-10 microns so as to obtain iron phosphate lithium positive recovery material. The method has simple technique, takes effect fast and reduces the material consumption and production cost of a manufacturer.

The invention relates to a method for improving anaerobic digestion performance of sludge by utilizing microwave alkaline thermal hydrolysis, and the method belongs to the technical field of solid waste treatment. Alkaline solution is firstly added in the sludge with the solid concentration of 7 percent-10 percent for controlling the pH value of the sludge, the mixing is carried out after adding the alkaline solution, the alkalified sludge is placed in a pressure-bearing reactor, the heating is carried out in a microwave field with the frequency of 2450MHz, the sludge heated by microwave is cooled to the room temperature, and the anaerobic digestion treatment is carried out on the sludge after the cooling. More than 60 percent of organic matters in the sludge which is treated by the method are converted to liquid phase; during anaerobic digestion, the conversion efficiency of the organic matters of the sludge is improved, thereby being an effective means for realizing the whole process pollution control, the energy conservation and the emission reduction of sewage treatment.

The invention discloses a mixed type creep feed which is prepared by mixing granule and powder, wherein the weight ratio of the granule to the powder is 65-70:35-30. The mixed type creep feed of the invention selects high quality raw materials and simulates breast milk, wherein the powder is mainly based on the nutritional requirements of weak and small piglets and the granule mainly considers the nutritional requirements of normal piglets. The mixed type creep feed of the invention is suitable for piglets of 7 days old-10 days after weaning. The invention realizes reductions of cross contamination and environment pollution in the production process, highly automatic control, and reduction of energy consumption by improving the feed conversion ratio. The overall system process improves the quality of early weaning feed for the piglets, simultaneously guarantees food safety, realizes high automation, simultaneously maintains environment protection and reduces energy consumption.

The invention relates to a liquid alkali roasting decomposition extraction process of mixed rare earth concentrates, which comprises the following steps of: (1) mixing mixed rare earth concentrates and sodium hydroxide (prepared solution) in the weight ratio of 1:0.5 to 1.5; (2) roasting the rare earth ore mixed with the sodium hydroxide at the roasting temperature of between 150 and 500 DEG C for 0.5 to 4 hours; (3) performing size mixing on roasted ore hot water obtained by roasting, adding oxidant simultaneously for oxidation, and performing washing until the mixture is neutral after the oxidation; (4) dissolving trivalent rare earth preferentially in washed alkali cakes in hydrochloric acid, and controlling the pH value to be between 4 and 5 to prepare rare earth chloride solution with less cerium; and (5) performing reductive dissolution of the hydrochloric acid on cerium dregs dissolved preferentially in the hydrochloric acid, and controlling the pH value to be between 4 and 5 to prepare cerium-rich chloride solution. The mixed rare earth concentrates are processed by adopting the extraction process, so that the continuous production of the alkali-decomposing mixed rare earth ore can be realized, cerium-rich products are extracted preferentially, the treatment capacity of the follow-up extraction separation is relieved, and the pollution-free production and comprehensive utilization of resources are realized.

The invention provides waterborne polyurethane decorative leather and a manufacturing method thereof. The manufacturing method includes the steps of 1), performing base cloth treatment; 2), coating; 3), agglomerating; 4), conducting washing and drying, namely removing residual solidification liquid on the base cloth through a washing trough, drying and setting so as to obtain waterborne polyurethane decorative leather base; 5), conducting dry-process direct coating, namely applying the waterborne polyurethane decorative leather base with waterborne direct coating topcoat slurry and drying; 6), subjecting the waterborne polyurethane decorative leather base obtained after dry-process direct coating to high-temperature embossing to shape surface effect grain so as to obtain the waterborne polyurethane decorative leather. The manufacturing method has the advantage that the waterborne polyurethane resin slurry and a waterborne environment-friendly auxiliary are used for enabling the decorative leather to be free of organic solvents during preparation and use, so that the problems of contamination and residues of solvent-type decorative leather are solved. The waterborne polyurethane decorative leather has the advantages of compact structure, less proneness to cracking and wear and flexibility in hand feel and can meet the demands of existing market on the decorative leather completely.

The invention discloses a device and a method for desulfuration, denitration and demercuration by using microwave induction and catalysis jointly. The device comprises a reactor and a microwave transmission and control device and further comprises at least three single mode microwave sources, at least three reaction cavities with microwave feedback ports are arranged in the reactor, and the reaction cavities are respectively communicated with the single mode microwave sources through the microwave transmission and control device. A short-circuit plunger opposite to positions of the microwave feedback ports of the single mode microwave sources is further arranged in each reaction cavity, and separation walls used for smoke to smoothly pass through and being capable of effectively avoiding mutual interference between single mode microwave in adjacent cavities are arranged among the reaction cavities. A catalytic agent/catalyst carrier for mainly conducting redox reaction on sulfur dioxide, nitric oxide and simple substance mercury in the smoke is respectively arranged in the reaction cavities. The device is high in joint desorption efficiency of smoke pollutant of the smoke of a plant, low in cost and small in equipment occupation space.

The invention discloses a method for extracting molybdenum, nickel, vanadium and ferrum from polymetallic black-shale paragentic minerals, comprising the following steps of: ball-milling the polymetallic black-shale paragentic minerals, and then adding into a pressure kettle for oxygen pressure leaching to obtain leach liquor containing ferrous sulphate, molybdenum trisulfate acyl, vanadic acid and nickel sulfate and leach residues containing molybdic acid sediments; adding ammonia water into the leach liquor to extract the vanadium; then carrying out reextraction to obtain ammonium vanadate; generating sediments containing the molybdenum and the ferrum and a solution containing the nickel; filtering to obtain nickel carbonate; carrying out warming alkaline leach on the leach residues containing the molybdic acid sediments and the sediments containing the molybdenum and the ferrum; filtering to obtain an alkaline leach solution containing the molybdenum and filter residues containing the ferrum; after resin absorbs the molybdenum, eluting, acid-precipitating, filtering, drying and calcining to obtain molybdenum trioxide; and acid-dissolving, reducing and filtering the filter residues containing the ferrum to obtain green vitriol. The invention prevents the pollution of smoke gases, such as sulfur dioxide and the like in environment and has low production cost and high recovery rate of molybdenum, nickel and by-products of the vanadium and the ferrum.

The invention discloses an oily sludge drying and burning integrated treatment technology and belongs to the technical field of oily sludge treatment. The oily sludge drying and burning integrated treatment technology is characterized by comprising the following steps of feeding; drying: repeatedly drying oily sludge through a high-temperature flue gas drying unit in an air drying mode and concentrating and collecting the dried sludge; pyrolysing: separating out pyrolysis gas, generating pyrolysis coke, exhausting the pyrolysis gas, congealing, concentrating and collecting the pyrolysis gas and conveying the pyrolysis coke into a burning unit; burning: burning the pyrolysis coke in a fluidized mode, utilizing a multidirectional air supply mode to adjust burning temperature of the pyrolysis coke and exhausting burned flue gas into a flue gas treating unit; treating flue gas: desulfurizing and denitrifying the flue gas. The oily sludge drying and burning integrated treatment technology disclosed by the invention forms an integrated treatment system with drying, pyrolyzing, burning, treating flue gas and recycling the flue gas integrated and achieves reduced and recycled comprehensive utilization of the oily sludge and emission reducing comprehensive utilization of pollutant.

The invention discloses a method using electrolytic manganese slag to manufacture an active mixed material. According to the preparation method, an activator and a reducing agent are added into electrolytic manganese slag according to a certain ratio so as to carry out physical and chemical reactions at a high temperature; the reaction products are calcined, and finally the calcined clinker is cooled to obtain the active mixed material. The active mixed material has the properties of volcanic ash, and can be used as the active mixing material in cement industry and composite blending material in commercial concrete industry. A large amount of acid leached slag discharged by electrolytic manganese plants can be used to produce the active mixed material, the environmental pollution generated by harmful components in electrolytic manganese slag is radically eliminated, the clean production of electrolytic manganese can be realized, the pollution is comprehensively controlled, and high economic benefit and environment protection benefit are generated.

The invention belongs to the technical field of underground water sampling and particularly relates to an underground water depth-setting stratified sampling device and an underground water depth-setting stratified sampling method applicable to regions without wells. The underground water depth-setting stratified sampling device at least comprises a sampling mechanism, a connecting mechanism and an underground sample injection mechanism, wherein the sampling mechanism comprises a first sampling mechanism body, a second sampling mechanism body, a sampling bottle, a gas-phase check valve, a nested flow splitting mechanism, a ball valve and a wellhead fixing support seat, the underground sample injection mechanism comprises a first underground sample injection mechanism body and a second underground sample injection mechanism body, and the connecting mechanism comprises a first connecting rod and a second connecting rod. Compared with similar technical products, the underground water depth-setting stratified sampling device applicable to the regions without the wells has the advantages that the device is novel in structural design and improved in working performance, functions, precision, stability and durability substantially, integrates a high-precision stratified sampling function and an underground water level line fluctuation monitoring function and can be rapidly mounted in the regions without the wells.

The invention relates to an attapulgite-graphite-like carbon nitride composite ceramic microfiltration membrane with photocatalytic performance and a preparation method thereof and belongs to the field of ceramic membranes. The method comprises the steps of preparing casting solution slurry from titanate coupling agent modified attapulgite and melamine; and preparing a wet membrane of the ceramic microfiltration membrane through a dip-coating method, airing at a room temperature and roasting to prepare the attapulgite-graphite-like carbon nitride composite ceramic microfiltration membrane. A separation layer of the ceramic microfiltration membrane is prepared from attapulgite fibers and graphite-like carbon nitride and the attapulgite fibers are disorderly stacked into the separation layer, so that relatively large total porosity and superficial area are provided for the separation layer; coupling of photocatalysis and separation processes can be achieved by using the photocatalytic performance of the graphite-like carbon nitride, and self-cleaning of the membrane is achieved; and the graphite-like carbon nitride is uniformly and dispersedly immobilized on the surface of attapulgite of the membrane through the chemical bonding effect, so that the disadvantages that granular graphite-like carbon nitride is easy to aggregate, difficult to separate and difficult to reuse in the using process are effectively avoided.

The invention discloses a water and fertilizer integration four-control irrigation fertilizing method. The method is composed of time control of fertigation, control of fertilizing amount, control of nutrient proportion and control of soil humidity. The method aims at moisture requirement and root depth of different crops for realizing accurate control of the soil humidity and irrigation depth, can limit the irrigation water and a fertilizer in a root zone scope, can avoid loss of volatilization and seepage due to excess fertilization, and realizes high efficiency utilization of water and fertilizer. The method can realize accurate fertilization and saves labor. The fertilizing control is carried out according to the crop nutrient requirement rules, and the method can control the time and space of the fertigation in scientific and reasonable mode, can guarantee good growth of crops, realizes high yield and stable production, can control the environment pollution due to fertilizer loss and volatilization due to excess fertilization, and mitigates the soil hardening and continuous cropping obstacles.

The invention relates to the technical field of the water-retention fertilizer-conservation cultivation for the drought-resistant forestation of the agriculture and forestry, and concretely relates to a bentonite and fungal dreg compounded water-retention fertilizer-conservation cultivation matrix and its preparation method. The matrix comprises 30-40 parts of bentonite, 60-70 parts of fungal dreg and 0.1-0.5 parts of a composite fertilizer. The preparation method of the matrix comprises the following steps: selecting new waste fungal bags after the edible fungus plantation, carrying out bag removal treatment, crushing, and adding a composite microbial agent and urea to guarantee the C:N ratio of 20; fully and uniformly mixing the above raw materials, adjusting the water content to 60%, composting the fungal dreg, and storing the obtained compost in a ventilation and rain exposing prevention device for the decrease of the water content to 20%; and uniformly mixing the fungal dreg with bentonite and the composite fertilizer, and crushing to prepare the water-retention fertilizer-conservation cultivation matrix. The matrix has the advantages of abundant sources and low costs of raw materials, wide distribution and low cost of a bentonite mineral resource, large output and easy obtaining of the waste fungal dreg, simple making method, and no pollution to the environment.

The invention discloses a preparation method for an energy-saving biological straw feed. The preparation method comprises the following steps: combining 35-45 percent of maize straw, 8-13 percent of bran, 8-12 percent of maize, 8-10 percent of wheat shorts, 10-12 percent of soybean meal and 16-18 percent of rapeseed dregs to form dry materials; mixing the dry materials with water and uniformly stirring; sterilizing the mixture at high pressure and inoculating the mixture to a microorganism according to the inoculum size which accounts for 10-40 percent of the weight of raw materials; meanwhile, adding 0.5-2 FPU (Filter Paper Unit)/g cellulase; and carrying out solid-stage fermentation at the temperature of 28-45DEG C for 36-72 hours to obtain a finished straw feed, wherein the maize straw is subjected to multistage cyclone grinding and crushing until the granularity is 200-300 meshes and the microorganism is preferably a mixture of bacillus subtilis and pediococcus pentosaceus. The preparation method disclosed by the invention is simple in process and is short in fermentation period; the maize straw prepared by the preparation method can replace maize components with high proportion in pig feed; and the prepared feed has the advantages of remarkable acid fragrance, favorable palatability, high lactic acid content, more beneficial variable counts, high activity of cellulase, high degradation rate of cellulose and hemicellulose and favorable safety.

The invention relates to a wastewater treatment process, in particular to a method for treating N-(phosphonomethyl)iminodiacetic acid wastewater by a coupling catalytic oxidation technology. The method comprises the following concrete steps of: adding catalytic oxidizers of sodium nitrite and sodium hypochlorite into the N-(phosphonomethyl)iminodiacetic acid wastewater in a mixing tank, filtering after stirring evenly, putting the wastewater into a multi-effect evaporation device, concentrating under the conditions that the temperature is 65-100 DEG C and the vacuum degree is from -0.05MPa to -0.09MPa and crystallizing a concentrate under the condition that the COD concentration of effluent water is below 5000mg/L to precipitate sodium chloride which can reach the standard of industrial salt. The invention has simple and convenient operation, strong controllability, simple equipment, cost reduction, less energy consumption and no secondary pollution; the invention is suitable for treating and reclaiming the N-(phosphonomethyl)iminodiacetic acid wastewater.

The invention discloses a pre-embedded bag for multi-stage remediation of uranium-contaminated soil and a use method thereof, and belongs to the technical field of uranium-contaminated soil remediation. The pre-embedded bag for multi-stage remediation of uranium-contaminated soil can be pre-embedded by a soil cleaning and per-embedding manner, on the one hand, uranyl ions in the soil are transferred through a strict water-conducting network, a large amount of uranyl ions are actively and quickly collected into the pre-embedded bag to facilitate fixed-point remediation, on the other hand, a special soil remediation agent is used to greatly improve adsorption and accumulation for uranyl ions, agglomeration of uranyl ions is improved based on nano porous properties, and uranyl ions are filledin micro-pores to avoid contamination and diffusion. After the active primary remediation, uranyl ions in the uranium-contaminated soil are reduced to a certain value, then natural secondary remediation, namely heavy metal uranium enrichment plant remediation, is followed, the soil organic matter content and soil fertility are increased, a soil surface structure is improved and maintained, and asolid foundation for direct use of the soil after uranium pollution remediation is laid.

The invention discloses fluidized-bed gasifier fly ash granules. The fluidized-bed gasifier fly ash granules are prepared by mixing 50-60% of fluidized-bed gasifier charged raw material pulverized coal, 40-50% of fluidized-bed gasified fly ash and 8-10% of binder in percentage by weight together, wherein the binder is formed by mixing 10-20% of cement and 80-90% of sodium silicate in percentage by weight together; the production method of the fluidized-bed gasifier fly ash granules comprises the following steps: (1) blending the fluidized-bed gasifier charged raw material pulverized coal and the fluidized-bed gasified fly ash evenly; (2) adding the binder, adding an appropriate amount of water and stirring to obtain a mixture; (3) performing cold rolling on the mixture into coal granules having a diameter in the range of 5-10mm; (4) naturally air-drying or drying the coal granules before being applied to combustion in a fluidized-bed boiler. The fluidized-bed gasified fly ash which cannot be utilized reasonably in the prior art is pelleted and applied to combustion in the fluidized-bed boiler, and therefore, the coal resources can be utilized sufficiently, the cost of an enterprise is reduced and the maximum resource utilization is realized, and meanwhile, the fly ash-induced pollution on the environment can be reduced and the goals of high energy efficiency, low energy consumption and low emission of the enterprise are realized.

The invention relates to a method for extracting a soil heavy metal ion. The method comprises the following steps: preparing an extraction salt solution with the pH value of 4.5, mixing collected soil, carrying out high-temperature forced air drying, grinding dried soil with a soil grinder, weighing part of ground soil, adding a certain amount of an extracting agent, carrying out heating and ultrasound treatment in an ultrasonic instrument, filtering impurities in the soil by adopting a two-step method, carrying out preliminary filtration with a large-aperture filter, then carrying out secondary filtration with a small-aperture rapid filter, removing the tiny impurities in the soil to obtain sample liquid to be tested. By adopting the method, the conventional operation procedure can be simplified, and the extracting efficiency of the heavy metal ion can be improved.

The invention discloses a digital false-proof certificate and preparing method, which comprises the following parts: paper, ink and photo, wherein the surface of paper possesses marked or implicit mark from one or more of watermark, pattern, number and decorative pattern, the design of paper adopts sine or cosine line to create variable ununiform, which can't be duplicated by other software without original point array, the line can be flower, curved relief, image relief, lace, microfilming character, latent image and thread, the ink is custom ink, which can be detected by instrument, the photo is printed on the paper with name, ID number or other coded number directly.

A garbage removal mechanical arm is mainly composed of a hand part, a rocker, a stand column, a manual hydraulic pump assembly, a lifting hydraulic cylinder, a rotary disc, a base and the like. The body movement includes up-down swinging of the rocker, clockwise and anticlockwise rotation of the rotary disc and movement of wheels in any direction in the horizontal plane. The mechanical arm is used for grabbing, conveying and unloading garbage, and mechanical garbage removal is achieved. According to the mechanical arm, the labor load of operators can be relieved, the production efficiency is improved as well, and high application and popularization value is achieved.