51results about How to "Achieve the purpose of removal" patented technology

The invention relates to a method for remediation of volatile organic compound and mercury compound contaminated soil, and belongs to the technical field of soil contamination remediation. The method comprises the steps that the contaminated soil is firstly excavated out of a contaminated land parcel, and breaking and screening treatment is carried out; then ferric chloride powder is added into soil particles according to the proportion of 1 g/kg-10 g/kg, after even mixing and stirring are carried out, vacuum heat treatment is carried out, the temperature is firstly controlled to range from 250 DEG C to 300 DEG C, and mercury and a small quantity of volatile organic compounds in the soil particles are removed; then the temperature is controlled to range from 500 DEG C to 600 DEG C, the volatile organic compounds in the soil are removed, and condensed air is supplied into the atmosphere through a vacuum pump; and the treated clean soil is taken out of a vacuum reactor. According to the method, remediation of the volatile organic compound and mercury compound contaminated soil is achieved, and the technological process is simple, efficient and free of secondary contamination.

The invention discloses a contaminated soil repair method and a repair device. The repair method comprises the steps of (S1) vacuum thermal separation: performing thermal separation on soil in a vacuum environment so as to separate hazardous substances, and purifying the hazardous substances; (S2) chemical washing: chemically washing the soil on which the vacuum thermal separation is performed; (S3) reduction treatment: adding a reducing agent to the soil on which the chemical washing is performed; (S4) repair: applying a soil repair agent to the soil on which the reduction treatment is performed; (S5) stabilizing treatment: applying a heavy metal cadmium stabilizer and a microbial agent to the repaired soil; and (S6) improvement and maintenance: improving and maintaining the stabilized soil. According to the contaminated soil repair method, the contaminated soil can be thoroughly repaired once with low cost and high efficiency.

The invention discloses a water-based polyaspartic acid ester resin and a preparation method thereof, and relates to the technical field of resin synthesis. The water-based polyaspartic acid ester resin is mainly prepared from the following resin raw materials: a polybasic primary amine compound, maleate and alkyl etherified monohydroxy polyether according to wherein molar ratio of (0.8-1.2):(1.6-3.6):(0.2-6.0), and has the advantages of good hydrophilicity, light color, convenience in construction and excellent weather resistance and yellowing resistance. The preparation method of the water-based polyaspartic acid ester resin comprises the following steps: addition, ester exchange, purification and the like, and has the advantages that oil-soluble resin can be converted into water-solubleresin, and VOC emission is reduced.

The invention relates to a method for removing tar and coke during gasification and a method and a device for reforming combustible gas. The method is characterized in that: pyrolytic gasified gas is fed into a porous ceramic superadiabatic partial tar and coke oxidizing and removing device, and undergoes partial combustion at the front end of porous ceramics or inside a ceramic body; high temperature generated by the combustion carries out heat storage of a porous ceramic body; during the process, the tar inside a combustible gas undergoes pyrolysis in the superadiabatic environment of the porous ceramics so as to form small molecular gas, while alkane gas components inside the combustible gas undergo reforming reaction inside the porous ceramics; and the coke is completely oxidized inside the porous ceramics, thereby reaching the goal of removing the coke. The methods and the device have the advantages that: the tar and the coke are not attached to the porous ceramics or the surface of porous ceramic catalyst, and inactivation phenomenon caused by tar and coke attachment does not occur; moreover, the content of the tar and the coke in gas is almost equal to zero after the reforming, and the heat value of fuel gas is increased.

The invention provides a method for removing calcium and magnesium in aloe gel juice, which comprises the following steps of: after cleaning aloe leaves, peeling off the aloe leaves; grinding and squeezing; sterilizing; carrying out enzymolysis, filtering, resterilizing and cooling; decoloring by macroporous anion resin; removing the calcium and the magnesium by strong-acid cation-exchange resin;and removing sulfate radicals and chloride ions by weak-base anion resin. The method has a high removal rate; the obtained aloe gel juice does not contain precipitates and is transparent and clear; the removal of other ingredients is not influenced; and the nutritional ingredients of the aloe product are also not influenced. The method is beneficial for protecting the environment, the resin can be repeatedly used for times after being regenerated, and the production cost is controllable.

The invention discloses a method for treating sewage by organism-soil infiltration. The method for treating the sewage by the organism-soil infiltration mainly comprises the following steps of: 1, performing an anaerobic reaction on the sewage so as to convert degradable macromolecular organic matter into micromolecules under an anaerobic environment; 2, mixing effluent after an aerobic reaction with effluent after the anaerobic reaction, then, distributing in soil, purifying water quality under a soil-microorganism-plant combined action, and performing denitrification on nitrates in the sewage to change into nitrogen (N2) under an anoxic condition to escape; 3, performing aerobic treatment on the effluent in the soil so as to digest residual organic matter in the sewage; discharging part of the effluent after residual ammonia nitrogen is removed, mixing part of the effluent with the effluent after the anaerobic reaction, and then, distributing into the soil; and 4, returning sludge after the aerobic treatment into the soil for use to serve as a fertilizer for plant growth. The invention also provides a device for realizing the method.

A vacuum separation method of a waste lithium iron phosphate battery positive plate comprises the following steps: cutting the waste lithium iron phosphate battery positive plate into loose sheets, and putting the loose pole plates into a vacuum furnace for vacuum roasting at the temperature of 350-450 DEG C for 1-6 hours; putting the calcined waste pole sheets into a vibrating screen in batches;adding steel balls with different particle sizes at the same time; and vibrating and screening to obtain aluminum foils on the vibrating screen and lithium iron phosphate waste powder under the vibrating screen. According to the method, the situation that aluminum foils are damaged and enters the lithium iron phosphate waste powder in the vibrating and screening process is reduced; and meanwhile,lithium is activated, and a foundation is laid for direct repair and recovery of a lithium iron phosphate pyrogenic process.

The invention discloses a comprehensive recovery method of a waste lithium battery positive electrode piece. The method comprises the steps that a positive electrode leftover material and a wasted positive electrode piece are placed into a vacuum furnace to be calcinated, rapping and screening are conducted to obtain a positive active substance, the positive electrode active material is added to asulphuric acid leaching solution, second-stage leaching is conducted, and leached slag carbon and the leaching solution containing nickel, cobalt, manganese and lithium; activated carbon is added tothe leaching solution to perform adsorption deoiling and silica removing, nickel carbonate, cobalt carbonate, manganese carbonate or lithium carbonate is replenished to the filtered residue to obtainprecursors, ball milling, sintering, pulverizing, grinding and mesh screening are conducted on the precursors, and a nickel-cobalt-manganese-acid-lithium positive electrode material is obtained. The method has the advantages that the technology is reasonable, the separation cost is low, and there exists no pollution, toxin or harm.

The invention provides a method for treating soil organic matter and mercury combined contamination. The method comprises the steps that firstly, weeds and stones on the surface of a contaminated plot are removed, and the soil is pressed by a rolling compaction device; the contaminated plot is covered with a low-density polyethylene film, and the low-density polyethylene film is tightly pressed through the rolling compact device; vertically downward drilling is conducted on the center of the contaminated plot through a drilling machine, and a cylindrical pore channel is formed; single-head heating rods are vertically inserted into the four corners of the contaminated plot downwards; the cylindrical pore channel is sequentially connected with a vacuum pump, a drying device, an activated carbon adsorption device and an exhaust cylinder through a pipeline; and the vacuum pump and the heating rods are started, and organic matter and mercury in the soil are separated under the effect of thermal radiation and vacuum pumping. By means of the method, it is not necessary to introduce air continuously, the separation process is enhanced through the thermal radiation and high negative pressure effect, and the efficient in-site repair is achieved.

The invention discloses a device and a method for removing VOCs (volatile organic chemicals) by high-voltage pulse dielectric barrier discharge combined with electrostatic micro-jet atomization. The device comprises a high-voltage discharge chamber, a high-voltage pulse dielectric barrier discharge device, an alkaline atomization region and a system power draught fan, wherein the high-voltage pulse dielectric barrier discharge device comprises a high-voltage pulse electrostatic generator, a high-voltage electrode plate, an insulating dielectric body, a wire mesh and a grounding electrode; andthe alkaline atomization region comprises arrayed capillary atomization nozzles, a high-voltage electrostatic generator and an alkaline liquid supply box, and a liquid collecting box is arranged. A high-voltage discharge region is formed in the discharge chamber through the high-voltage pulse dielectric barrier discharge device, high-energy electrons, free hydroxyl groups, ozone and active ions are formed to fully oxidize and decompose gaseous molecules of the VOCs, and micron-sized alkaline atomized droplets absorb the organic exhaust gas to neutralize the acid gas. The device and the methoddisclosed by the invention can effectively kill bacteria in the air, absorb the organic gas and neutralize the oxidized and decomposed acid gas so as to realize removal of the VOCs in the chamber.

The invention provides a method for remediating soil contaminated with volatile organic compounds. The method comprises the steps that the contaminated soil is subjected to crushing and screening treatment, activated aluminum oxide is added into soil particles according to the proportion of 10g: 1kg, sodium dodecyl benzene sulfonate is added into the soil particles according to the proportion of 20g:1kg, and 0.5-1 L of purified water is added into the soil particles to obtain a soil mixture; and then the soil mixture is placed into a desorber, provided with a heating unit and a compressing unit, of a vacuum desorption device, compressing and heating desorption is conducted, the volatile organic compounds in the soil are desorbed under heating and squeezing effects, and purified soil is obtained. The method is easy in implementing process, easy to operate, free of secondary pollution in the whole process, high in desorption efficiency, and suitable for treating heavily organic contaminated soil.

The invention relates to a method for removing iron and arsenic in a copper sulfate solution and belongs to the field of nonferrous metal hydrometallurgy. The method comprises the following steps: under a stirring condition, adding copper hydroxide slag to a copper sulfate solution containing a certain amount of iron and arsenic, controlling the pH of the solution to the range of 1.0-2.0, adding industrial-grade hydrogen peroxide in a certain molar ratio according to the content of iron and arsenic in the solution to oxidize the low-valence state iron and arsenic in the solution, and then adding the copper hydroxide slag again, controlling the final pH to the range of 2.0-3.5, and after liquid-solid separation, crystalizing the solution removed from iron and arsenic to prepare a copper sulfate product or an electro-deposited cathode copper product, and treating the filter cake in a lead smelting system. The method is capable of efficiently removing the iron and arsenic in the copper sulfate solution; the iron removal rate is within the range of 99.20-99.80% and the arsenic removal rate is within the range of 95.86-99.22%; and no impurity ion is introduced in the whole process, and the whole process is clean and efficient in production.

The invention discloses an Al2O3-Tob/HA compound sewage treatment material, and a preparation method and application thereof. The preparation method comprises the following steps: using pre-pickling pulverized fuel ash as a silicon source and an aluminium source, using slaked lime Ca(OH)2 as a symbiotic calcium source and using phosphoric acid as a phosphorus source; at first, adopting a sonochemistry method, and controlling the temperature and regulating the pH value to 10.5 to 11.5 to prepare an aluminum substituted tobermorite performed polymer; then adding a phosphoric acid solution to obtain an Al2O3-Tob and HA symbiotic co-polymer; finally adopting a hydrothermal vapor pressure method to prepare an Al2O3-Tob/HA compound sewage treatment material of which the compound ratio X is 2 to 4. Test results show that the product impurity phases are few, the purity is high, Al2O3-Tob and HA crystallization conditions are favorable, and the product has a net framework structure, large specific surface area, and a strong property for adsorbing and desorbing heavy metal ion Cd<2+>, and the adsorbing property is enhanced along with the increase of the compound ratio in an experimental scale. The production process is simple, the operation process is convenient, the production cost is low, and the preparation method is a practical and effective method for using pulverized fuel ash solid wastes.

The invention provides a phenol-containing wastewater treatment method. The method comprises the steps of mixing phenol-containing wastewater with a removal agent for dephenolization, and standing for layering and separation, so as to obtain lower-layer dephenolized wastewater and an upper-layer phenol-containing organic phase, wherein the removal agent is an organic quaternary ammonium salt compound. According to the phenol-containing wastewater treatment method, phenol in the phenol-containing wastewater can be efficiently removed by virtue of mixing and standing simply, the treatment temperature and the treatment pressure are not specially required, and the method can be implemented at normal temperature and normal pressure.

The invention provides a crude oil dehydration apparatus, comprising: a distillation kettle comprising a kettle body with an inner cavity, and a seal cover positioned at the top of the kettle body, with the bottom of the kettle body provided with a distillation kettle discharge port; a heater arranged in the kettle body and used to heat crude oil in the inner cavity of the kettle body; a cooler arranged on the side of the seal cover facing the kettle body; and an oil-water separator arranged in the kettle body below the cooler. The oil-water separator is provided with a condensate inlet and a separator outlet, the condensate inlet is used for receiving condensate formed by cooling of the cooler, and the separator outlet is close to the bottom of the inner cavity. The crude oil dehydration apparatus has the advantages of high dehydration speed and high dehydration rate.

The invention relates to a system for removing varieties of pollutants of fuel gas distribution type energy station and a work method thereof. In the present, control on distribution type energy exhaust pollutants is an important subject to be researched. In the system disclosed by the invention, tail exhaust gas of the distribution type energy system reversely contact a saturated sodium hydroxidesolution or a saturated potassium hydroxide solution which is sprayed from top to bottom, and carbon dioxide and nitric oxide in the exhaust gas is absorbed by saturated sodium (potassium) hydroxide;meanwhile, a contact heat exchange temperature between the exhaust gas and the saturated sodium (potassium) hydroxide solution is reduced, and the purposes of removing varieties of pollutants and reducing the exhaust gas temperature are achieved; in addition, waste absorption liquid is treated to obtain industrial products of sodium (potassium) carbonate and sodium (potassium) carbonate.

The invention discloses a preparation method of a flocculation decolorizing agent, belonging to the technical field of flocculants. The preparation method comprises the following steps: 1, preparing magnetic Fe3O4 nanoparticles through a solvothermal method; 2, preparing a modified silane coupling agent from alliin and a silane coupling agent; 3, modifying the magnetic Fe3O4 nanoparticles by adopting the modified silane coupling agent to obtain modified magnetic Fe3O4 nanoparticles; and 4, carrying out a graft copolymerization reaction on chitosan by adopting the modified magnetic Fe3O4 nanoparticles and L-allylglycine to obtain the flocculation decolorizing agent. According to the preparation method, chitosan is taken as a grafting main chain and L-allylglycine and modified magnetic Fe3O4 nanoparticles are taken as grafting comonomers to prepare the flocculation decolorizing agent; and a large amount of carboxyl groups, amino active groups and magnetic particles are introduced to chitosan, so the chitosan-based flocculation decolorizing agent with multiple functions including a decolorizing function, a flocculation function, a sterilization function, salt tolerance, magnetic response performance and the like is prepared.

The invention provides an oil field sludge treatment method. The oil field sludge treatment method comprises the following steps: firstly excavating oil field sludge from an oil field, adding activated aluminum oxide particles into the oil field sludge in a certain proportion, and uniformly mixing, so as to obtain an oil field sludge mixture; putting the oil field sludge mixture into a pyrolyzer of a vacuum desorption device, vertically downward pressurizing the pyrolyzer by virtue of a compression device at the upper part of the pyrolyzer with a pressure of 10MPa-20MPa, and introducing the oil field sludge mixture into a condensing device, and recycling to obtain pyrolysis oil, wherein the temperature is controlled at 350-450 DEG C, the treatment time is controlled at 20-30 minutes, the internal pressure of a vacuum reactor is controlled at 20kpa, moisture in the oil field sludge flows into a liquid collection tank through a sieve hole plate at the lower part of the pyrolyzer, and organic matters in the oil field sludge are pyrolyzed and removed under the heating and extruding effects; introducing gas recycled by virtue of the condensing device into atmosphere; and taking out treated dried residues from the desorption device. The whole implementation process of the invention is simple, easy to operate and high in treatment efficiency and has no secondary pollution.

The present invention is based on the requirements for the water content of the solvent when the polymer material is prepared by the slurry method, and provides a method for the preparation of an adsorbent and the synergistic use of microwaves, which is characterized in that silicon carbide, microcrystalline cellulose, and carboxymethyl cyclopa Ethyl alcohol and butanediol glycidyl ether were dissolved in sodium hydroxide solution, stirred evenly, poured into octadecane, suspended and polymerized for 36 hours, washed and freeze-dried to obtain porous hydrophilic adsorbent microspheres with different particle sizes. The preparation method of the adsorbent is simple and easy, and the trace water in the solvent is removed through the adsorption bed under the radiation of the microwave field, and has the characteristics of low energy, high efficiency and easy operation.

The invention discloses a method for preparing an alkaline manganese oxide nano tube by room temperature corrosion. The method comprises the following steps of (1) preparing a Cu-Mn-O alloy ingot: mixing pure Cu and pure Mn at an atomic ratio of (18-20):(28-30), supplying partial air to an argon atmosphere, performing repeated smelting for more than three times, performing uniform mixing, and then performing cooling to obtain the Cu-Mn-O alloy ingot; (2) performing corrosion: placing the obtained Cu-Mn-O alloy ingot in a 0.03-0.07mol/L excessive hydrochloric acid solution, and performing the corrosion for 60-80h at a room temperature until the surface of the alloy ingot has no bubble overflow to obtain the corroded Cu-Mn-O alloy ingot; and (3) performing cleaning and drying: taking out the corroded Cu-Mn-O alloy ingot, sequentially soaking and cleaning the Cu-Mn-O alloy ingot by deionized water and alcohol, placing the Cu-Mn-O alloy ingot in the alcohol, performing ultrasonic dispersion treatment, and performing the drying to obtain an MnO(OH) micro-nano tube structure. According to the method, the MnO(OH) micro-nano tube is prepared under a room temperature condition by regulating and controlling a component and a structure of a master alloy and combining a simple room temperature corrosion method, and a novel technical approach is provided for preparing the MnO(OH) micro-nano tube.