312results about How to "Fast precipitation" patented technology

The invention relates to a heavy metal stabilizer for removal of heavy metal pollution and its using method. The heavy metal stabilizer contains the compound lignin-based dithiocarbamate, which is a combination of one or more of lignin-based sodium dithiocarbamate, lignin-based potassium dithiocarbamate, or lignin-based ammonium dithiocarbamate, and can be used for treatment of heavy metal pollution. After treatment with the heavy metal stabilizer provided in the invention, the heavy metal content can meet the requirements of environmental protection standards. A heavy metal ion chelate formed after the treatment is chemically stable and is difficult to cause secondary pollution. Meanwhile, the treatment cost of heavy metal pollution can be significantly reduced.

The invention discloses a recycling harmless treatment method of stainless steel pickling waste water, belonging to the toxic and harmful industrial waste water treatment field. The method comprises the following steps of: 1) recycling inorganic acids by an acid separation method: pumping stainless steel pickling waste water in which suspended matters are removed through filtering into a resin column so that the inorganic acids are absorbed on the resin; 2) removing impurities by a goethite method: pumping heavy metal ion solution into a reaction kettle, adjusting pH to a range from 3.5 to 5.0, and continuing reacting for 30-90 min, thereby removing iron, chromium and fluorine in the heavy metal ion solution in the form of dregs; 3) recycling nickel by a neutralized sedimentation method: feeding an alkaline liquor to nickel solution to adjust pH to a range from 9.5 to 12.5, and filtering and washing the filter residues, thereby obtaining nickelous hydroxide; and 4) performing harmlesstreatment on the dregs: after washing the dregs, adding lime powder to the dregs to realize stabilization treatment of harmful elements. The method is simple in operation and convenient for management; the high-concentration inorganic acids and nickel and the like contained in the waste water are all recycled, and simultaneously the generated dregs are harmlessly treated; and therefore the integration of economic benefit,environmental benefit and social benefit is realized.

The invention discloses a method for harmless and recycling treatment of stainless steel acid washing waste water neutralization sludge, belonging to the field of harmful and valuable heavy metal resource recovery. The stainless steel acid washing waste water neutralization sludge is leached out by sulphuric acid, harmful and poisonous metals manganese, nickel and chromium enter into the leachate, and harmless treatment is carried out on the sludge. Separation, enrichment and recovery of metal resources of iron, manganese, chromium and nickel in the leachate are realized by adopting goethite method, potassium permanganate oxidation method, anion resin exchange method and chelate resin absorption method respectively, and effluent up to the standard is discharged after treatment or is returned to water consuming link in technologic process. The method of the invention has short technological flow, simple operation, management convenience, high recovery rate of valuable metal resources of manganese, nickel and chromium, recycling of multiple valuable metals is realized while the sludge is subject to harmless treatment, and unification of economic benefit, environmental benefit and social benefit is realized.

The invention discloses a magnetic separation method for a mine water underground treatment. The method comprises: removing large particle impurities and floating substances in mine water; adding a magnetic seed and a coagulant; stirring for 1-2 min at a rotation speed of 200-250 rotation / min; adding an auxiliary coagulant; stirring for 1-2 min at a rotation speed of 20-50 rotation / min; stirring for 3-5 min at a rotation speed of 10-20 rotation / min; conveying the water with the magnetic flocculation treatment to a precipitation tank; and carrying out nature precipitation through the floc weight, wherein the upper layer clear water can be subjected to standard discharge or be reused, the precipitated magnetic sludge is dispersed, the magnetic seed is separated to be recycled, and the remaining non-magnetic sludge is dewatered and then is conveyed to the on-well, wherein a water content of the dewatered sludge is less than 60%. The invention further discloses a magnetic separation apparatus for the mine water underground treatment, wherein the apparatus is designed according to the method. According to the present invention, the method and the apparatus are matched appropriately, an integration degree is high, an occupation area is small, energy consumption is low, operation cost is low, a treatment effect is good, and the method and the apparatus are especially suitable for construction under the mine.

The invention provides a preparation method of a superfine crystal inoculating agent for aluminum alloy grain refinement and relates to aluminum-based alloy and is a method for preparing nano-crystalline Al-Ti-B-Re thin-strip intermediate alloy by a rapid solidification technology of metal, wherein the method comprises steps as follows: proportioning 5-5.4% of Ti, 1-1.04% of B, 1-1.2% of Ce, 0.05-0.2% of La and the balance of Al according to determined ingredients; weighing raw materials Al-5Ti-1B intermediate alloy and lanthanum cerium alloy to proportion the materials; melting in vacuum to obtain blocky Al-5Ti-1B-1Re intermediate alloy; carrying out rapid solidification to obtain the superfine crystal inoculating agent for the aluminum alloy grain refinement, wherein the superfine crystal inoculating agent is the nano-crystalline Al-5Ti-1B-1Re intermediate alloy. With the adoption of the method provided by the invention, adverse impact of needlelike TiAl3 on the matrix structure is eliminated, nucleating particles TiAl3 with thinner size and more dispersed distribution are obtained, and superfine nucleating particles are realized.

The invention discloses an anionic dye adsorbent as well as a preparation method and application thereof, relating to a dye adsorbent as well as a preparation method and application thereof, being used for solving the technical problem that in the existing printing / dyeing wastewater treatment methods, a chemical treatment method is poor in the treatment effect, and an activated carbon method is high in cost. The anionic dye adsorbent disclosed by the invention is quaternary ammonium salt cellulose with a structural formula as follows: wherein, n is an integer between 300 and 800. The preparation method comprises the following steps: adding waste newspaper fibers subjected to deinking into a sodium hydroxide solution, then, mixing the two so as to obtain turbid liquid; adding epoxy chloropropane into the turbid liquid to react, then filtering the obtained object so as to obtain a solid-phase object; and adding triethylamine into the solid-phase object to react so as to obtain a coarse product, then carrying out washing and drying on the coarse product, thereby obtaining an anionic dye adsorbent. The preparation method is simple, and easy to operate. The anionic dye adsorbent can beused for anionic dye wastewater treatment. After the anionic dye adsorbent is reacted with anionic dyes in water, the obtained object is sedimented quickly in a coprecipitation form, therefore, the wastewater treatment efficiency is high.

The invention discloses a split-range drying method for paddy. The method has the technical points: performing preliminary cleaning and hot air drying on harvested high-moisture paddy, tempering, redrying and retempering the paddy, and keeping the ratio of the drying time to the tampering time within the range from 1 to 6 until the moisture content is reduced to 18.5 to 18 percent; conveying the paddy into a paddy temporary storage warehouse for slow cooling, ventilation and temporary storage; performing the hot air drying on the paddy of the temporary storage warehouse with a dryer after the paddy harvest season, retempering, drying and retempering the paddy, keeping the ratio of the drying time to the tampering time within the range from 1 to 8 until the moisture of the paddy is reduced to be below 14.5 percent; and conveying the paddy to a warehouse for storage. The method has the advantages of improving the moisture reducing rate and the utilization efficiency of the paddy dryer, reducing the loss after the paddy production caused by high moisture during the concentrated paddy harvest season, ensuring the safety for dry storage of the foodstuffs and having obvious economic benefit and social benefit on the premise of ensuring the drying quality of the paddy.

The invention discloses a miscellaneous filtering device for sewage treatment, which includes a miscellaneous discharge chamber, a primary sedimentation chamber and a secondary sedimentation chamber, a water inlet pipe is installed above the left end of the miscellaneous discharge chamber, and the waste discharge chamber The middle position of the left side wall of the miscellaneous room is provided with a first motor, and the right end of the first motor is equipped with a first rotating shaft. filter screen, the bottom plane of the miscellaneous room is provided with a miscellaneous bucket, the bottom end of the described miscellaneous bucket is provided with a miscellaneous chamber, and the described primary sedimentation chamber is located on the right side of the miscellaneous room. The miscellaneous room and the primary sedimentation chamber are communicated through the infusion tube, and the top of the primary sedimentation chamber is provided with an auxiliary material box; the beneficial effect of the present invention is: the principle of multi-stage sedimentation is adopted, and the sewage in the upper layer is repeatedly pumped out before being treated. Filtration treatment can fully ensure the quality of sewage after filtration.

The invention discloses a sugarcane juice clarifying method. The method comprises the steps of: sequentially performing pre-liming, primary heating, foam making and air-floating separation on mixed juice which accounts for 30-95% of the total amount of mixed juice to obtain floating clear juice; mixing the rest mixed juice with the floating clear juice to obtain a mixed clear juice; and secondarily heating the mixed clear juice, stoving and neutralizing the mixed clear juice, heating the neutralized juice, and rapidly settling the neutralized juice to obtain clear juice, wherein the mixed juice is sugarcane juice obtained by the work procedure of pressing sugarcanes. The air-floating separation of part of mixed juice is combined with the rapid settlement of the rest of the mixed juice, the staying time of the sugarcane juice can be shortened, the remove rate of the non-sugar ingredient is increased, the pH value of the clear juice is stable, the phenomena of 'bottom reversing' of a settlement tank and 'cane sugar conversion' are avoided, the production cost is saved, the environment pollution is reduced and the product quality is improved.

Disclosed herein is a method involving the steps of (a) precipitating an amount of asphaltenes from a liquid sample of a first hydrocarbon-containing feedstock having solvated asphaltenes therein with one or more first solvents in a column; (b) determining one or more solubility characteristics of the precipitated asphaltenes; (c) analyzing the one or more solubility characteristics of the precipitated asphaltenes; and (d) correlating a measurement of feedstock fouling tendency for the first hydrocarbon-containing feedstock sample with a mathematical parameter derived from the results of analyzing the one or more solubility characteristics of the precipitated asphaltenes.

The invention belongs to the field of rare earth gathering, and particularly relates to an organic precipitator as well as a preparation method and application thereof. The organic precipitator provided by the invention is prepared from one or more of structural compounds of formula (I) to formula (III), wherein R1, R2, R3 and R'3 are independently selected from hydrogen, substituted or non-substituted linear chain alkyl with the number of carbon atoms of 1 to 10, substituted or non-substituted branched alkyl with the number of the carbon atoms of 3 to 10, and substituted or non-substituted aryl; n is a natural integer; and M<n+> indicates cations. The organic precipitator provided by the invention has good selectivity to the rare earth and is very suitable for gathering rare-earth elements in a low-concentration rare-earth solution. The experiment result shows that when the organic precipitator provided by the invention is used for gathering the rare earth in the low-concentration rare earth solution, the precipitation speed is high, the purity of the gathered rare earth product is greater than 96 percent, and the yield is greater than 95 percent. (The formula (I) to (III) are shown in the description).

The invention discloses a rain water system for building districts of sponge cities. The rain water system is characterized by comprising a sedimentation pond, a distribution well, a treatment pond and overflow wells, wherein an environment-friendly rain water opening is formed in a position above the sedimentation pond, the sedimentation pond is connected with the distribution well through a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, at least four distribution pipes are arranged on the left end surface of the distribution well, the distribution well is connected with the treatment pond through the distribution pipes, and the treatment pond is connected with the overflow wells through overflow pipes. A construction method of the rain water system comprises the following steps: (1) performing construction preparation; (2) excavating foundation pits; (3) performing foundation treatment; (4) building the sedimentation pond and the distribution well; (5) building the treatment pond and the overflow wells; (6) laying pipelines; and (7) performing ground treatment. The rain water system disclosed by the invention is simple in structure and high in practicability, and is used for collecting and treating rain water on the ground of building districts, so that the phenomenon of water accumulation on the ground of the districts is effectively avoided; and besides, rain water is collected, so that waste of water resources can be reduced.

The invention discloses a negative pressure air jet deep well dewatering device of a foundation pit. The negative pressure air jet deep well dewatering device comprises a negative pressure system, a positive pressure system and a deep well pipe assembly. The negative pressure system is composed of a vacuum pump, a drain pipe, a vacuum water main and a vacuum branch water pipe. The positive pressure system is composed of an air compressor, an air main, a branch air pipe, a switching valve and an air tap. The deep well pipe assembly is composed of a well pipe and a well cover. The vacuum branch water pipe of the negative pressure system extends into the well pipe through the well cover. The branch air pipe of the positive pressure system extends into the well pipe through the well cover, or penetrates into the vacuum branch water pipe from the outside of the well cover and extends into the well pipe together with the vacuum branch water pipe. The negative pressure air jet deep well dewatering device is additionally provided with the set of positive pressure system, improves the dewatering speed in the initial dewatering period, and has the advantages of high work efficiency, easiness in construction and good dewatering effect as the vacuum branch water pipe can reach downwards to the dewatering depth of the foundation pit in one time without adjustment.

The invention discloses a magnetic separation water body purification system and a separation and purification method thereof. The system comprises a submersible sewage pump, an electromagnetic flowmeter, a pipeline mixer, a coagulation channel, a magnetic seed reaction chamber, a flocculation reaction chamber, a sedimentation tank, a vertical low temperature ionized water treatment unit, a first booster pump, a second booster pump, a coagulant soaking machine, a flocculant soaking machine, a first electromagnetic diaphragm metering pump, a second electromagnetic diaphragm metering pump, a mortar pump, a sludge shearer, a magnetic drum, a sludge concentration tank, a sludge dehydrator, a filtrate storage tank, a dryer, a biomass carbonization furnace, a cooling device, a sewage pipeline, a circulating water pipeline, a medicating pipeline and a sludge pipeline; the method comprises sewage coagulation, sewage magnetization, sewage flocculation, sewage separation, water body purification, sludge shear, magnetic powder separation, sludge concentration, sludge dehydration, sludge drying, sludge carbonization and biomass carbon collection. Closed ring system design is adopted, and system functions are subjected to coordination control by a series connection-parallel connection process.

The invention relates to a method for purifying seawater by taking carboxymethyl chitosan as a flocculant. The method comprises the steps of: preparing water-soluble carboxymethyl chitosan (CMC) and polyferric chloride (PFC) into aqueous solution respectively; adding both the aqueous solution into the seawater one after another to obtain a mixture; precipitating the mixture after stirring; and removing the precipitate to obtain purified seawater, wherein the mass ratio of the added CMC to the PFC to the seawater is 1ton:2-2.5g:10-20g; the aqueous solution of carboxymethyl chitosan contains 2g of carboxymethyl chitosan per liter water; and the aqueous solution of the PFC contains 5-10g of the PFC per liter water respectively. The method for purifying the seawater has the advantages of simple technological operation, readily available raw material, no secondary pollution to water body and high purification efficiency. The method not only can be used for pretreating of the seawater purifying but also can be used for treating sewage water discharged after seawater utilization, and has a wide popularization and application prospect.

The invention discloses a water coagulation treatment method. The method comprises that: a coagulating agent is adopted to carry out coagulation treatment on water; and in the process of water coagulation treatment, a catalyst and an oxidant are thrown into the water. Through the addition of the catalyst and the oxidant in the process of the water coagulation treatment, the catalyst forms a solid-liquid reaction interface in the water; and the oxidant undergoes rapid oxidation reaction on the interface and oxides organisms to destroy the protective function of the organisms on suspended particles. The adsorptive action of the catalyst can combine with colloid particles in the water to form a microfloc nucleus so as to increase the concentration of particles in the water and be favorable for the formation and growth of floc in the coagulation reaction.

The invention discloses high-strength and toughness non-quenched and tempered steel and a preparation method thereof, and belongs to the technical field of structural alloy steel. The N content is increased, Mn, Cr and V are reasonably added, and the V / N mass ratio is accurately controlled, so that the problem of incapability of combining strength, toughness and use cost of non-quenched and tempered steel in the prior art are solved. The high-strength and toughness non-quenched and tempered steel is prepared from the following components according to mass percent: 0.23 to 0.27% of C, 0.22 to 0.35% of Si, 1.81 to 1.90% of Mn, 0.50 to 0.55% of Cr, 0.045 to 0.06% of S, less than or equal to 0.02% of P, 0.11 to 0.14% of V, 0.025 to 0.040% of N and the balance of Fe and inevitable impurities. The tensile strength of the high-strength and toughness non-quenched and tempered steel is greater than or equal to 950 MPa, and the Charpy impact work KU2 (20 DEG C) is greater than or equal to 55 J.The preparation method of the high-strength and toughness non-quenched and tempered steel comprises the steps of smelting, forging and cooling after forging. The high-strength and toughness non-quenched and tempered steel can be used for automobile safety parts.

The invention provides a preparation method of a ternary precursor, the ternary precursor, a positive electrode material and a lithium ion battery, and relates to the technical field of metallurgy, and the preparation method comprises the following steps: (a) preparing a ternary precursor seed crystal in a first reaction kettle; (b) preparing ternary precursor slurry by utilizing the ternary precursor seed crystal; and (c) obtaining the ternary precursor. The method is low in requirement for production equipment, capable of achieving large-scale production, high in efficiency and stable in product quality. Primary particles on the surfaces of secondary spherical particles of the ternary precursor provided by the invention are regularly arranged and are loose and porous, and particularly gaps can be generated between primary particles. The ternary precursor can be used for preparing a positive electrode material. The positive electrode material can be used for preparing a lithium ion battery, a lithium ion diffusion channel can be increased, and the first charge-discharge performance, cycle performance and rate capability of the battery can be remarkably improved.

An improved drilling and completion fluid can be used in subterranean drilling for oil and gas. Sodium silicate and potassium silicate-based drilling fluids are commonly used drilling fluids with the notable attributes of exceptional shale stabilization characteristics coupled with exceptional environmental performance Environmental and wellbore stabilization characteristics are improved by using high ratio aqueous silicates wherein ratio is defined as the molar ratio of SiO2:Me2O, where Me is an alkali and is most commonly sodium or potassium (i.e. Na2O and K2O). For high ratio aqueous alkali silicates, the molar ratio of SiO2:Me2O can range from just over 4.0 to about 12.0.

Preparation of a coagulant of polyphosphate ferric chloride adopts waste phosphating residues produced from steel phosphating treatment as raw materials, and the coagulant is especially suitable for the treatment of oil-containing colored industrial wastewater. The product preparation of the invention adopts phosphating residues, industrial hydrochloric acid, and ferrous phosphate as raw materials, wherein the HCl content (weight ratio) is not less than 30%; the phosphating residues and industrial hydrochloric acid are polymerized according to a certain ratio so as to obtain clear orange liquid of polyphosphate ferric chloride. When the coagulant of polyphosphate ferric chloride of the invention is used in water supply and sewage treatment, when compared with existing coagulants, the product of the invention has the characteristics of high oil-removing and decoloration efficiency, few medicament adding amount, wide medicament adding range, and the like; the production processing process of the product does not cause secondary pollution; the production process is simple; waste phosphating residues are used as raw materials; the production cost is low; and thus the product of the invention has low price.

The invention provides a method to obtain nickel sulfide from pickle liquor of laterite nickel mine. Wherein, the leachate has pH value not less than 1.7 with nickel and sodium sulfide added for the mass ratio 1:3-8; mixing evenly, controlling the nickel ion concentration less than 0.02g / L and filtering; adding water into the residue with ratio for solid and liquid of 1:2, clearing, filtering and obtaining the product; then, neutralizing the filtrate to pH value as 2-4 for recycle or release. This method can obtain high-grade product and the nickel deposition rate can reach 99.5% or more.

The invention relates to the technical field of water processing, in particular to an integrated flocculent precipitating device, and belongs to the improvement of a water purifying device structure.The integrated flocculent precipitating device comprises a sewage and flocculant injecting device, a mud discharge device and a flocculation reaction and stirring device. The sewage and flocculant injecting device comprises a sewage and flocculant injecting pump and a water inlet pipe. The mud discharge device comprises a first motor, a mud discharge pipe and a mud scraper. The flocculation reaction and stirring device comprises a flocculation reaction barrel, a stirrer, an annular rectifying body and a second motor. The integrated flocculent precipitating device is simpler and more optimal, reasonable and compact in structure, stable in operation, low in operation cost, high in precipitating speed and high in work efficiency and remarkably has a good precipitating technological effect inpractice.

The invention discloses a composite visible-light-induced catalyst and a preparation method and application thereof. The composite visible-light-induced catalyst is prepared from CNT-silver citrate and g-C3N4-PO43- through a precipitation method, wherein the CNT-silver citrate is prepared from CNT, sodium citrate and AgNO3 through surface complexing action, and the g-C3N4-PO43- is prepared from g-C3N4 and NaH2PO4 through surface phosphorylation. The preparation method includes the steps of preparation of the CNT-silver citrate, preparation of the g-C3N4-PO43- and preparation of CNT / Ag3PO4 / g-C3N4. The composite visible-light-induced catalyst can be applied to treatment of antibiotic wastewater and has the advantages of high visible light utilization rate, stable presence in water and stable photocatalytic performance.

The problem is to provide an electrolytic gold plating solution suitable for nickel barrier plating while maintaining the excellent properties of the gold plating film, e.g., mechanical characteristics, corrosion resistance, and electrical characteristics, that is, the problem is to provide an electrolytic gold plating solution capable of manufacturing a stable product that limits gold depositionat 'portions not requiring gold plating (nickel barrier portions)' where members are mechanically constrained, and ensures satisfactory gold deposition in portions requiring gold plating, without extraneous deposition of the gold. The aforementioned problem is solved by means of an electrolytic gold plating solution that contains a gold cyanide salt as the gold source, and a heterocyclic compoundhaving one or more nitrogen atoms in the ring and one or more nitro groups replacing a carbon atom in said ring, and by means of a gold film that is obtained by electrolytic gold plating onto a nickel film using the aforementioned electrolytic gold plating solution.

The invention belongs to the technical field of sewage treatment, and especially relates to an integrated sewage processing equipment. The integrated sewage processing equipment comprises a housing; the upper end of the housing is provided with a PLC controller; an inner cavity of the housing is successively connected with, from left to right, a first separation plate and a second separation plate; the side of the first separation plate opposite to the inner cavity of the housing is provided with a filter chamber, and the side of the first separation plate opposite to the second separation plate is provided with a precipitation chamber; the upper end of the filter chamber is provided with a first threaded cap; the upper end of the first threaded cap is connected with a water inlet pipe; and the two sides of an inner cavity of the precipitation chamber are provided with first sliding chutes. The integrated sewage processing equipment is reasonable in structure design, is high in practicality, is flexible in structure using, is convenient for installation, dismounting, later maintenance, using, and cleaning of accumulated sludge, and is convenient for alarming workers to clean garbage, so that sewage treatment efficiency is increased, and it is beneficial for improvement of sewage treatment effect.

An improved drilling and completion fluid can be used in subterranean drilling for oil and gas. Sodium silicate and potassium silicate-based drilling fluids are commonly used drilling fluids with the notable attributes of exceptional shale stabilization characteristics coupled with exceptional environmental performance Environmental and wellbore stabilization characteristics are improved by using high ratio aqueous silicates wherein ratio is defined as the molar ratio of SiO2:Me2O, where Me is an alkali and is most commonly sodium or potassium (i.e. Na2O and K2O). For high ratio aqueous alkali silicates, the molar ratio of SiO2:Me2O can range from just over 4.0 to about 12.0.

The invention relates to an impurity removing method in a process of preparing alumina from fly ash by utilizing an acid method. The method comprises following steps: by utilizing the characteristic that iron (III) dimethyldithiocarbamate does not precipitate in an alkaline environment condition, adjusting the pH value of the system to the alkaline range by adding ammonia water, ammonia gas, or sodium hydroxide to precipitate iron in the form of iron hydroxide, then subjecting the reaction liquid to a filtration separation treatment so as to obtain an aluminium salt solution without iron, crystallizing the aluminium salt solution without iron to precipitate, filtrating to separate so as to obtain aluminium salt crystals and filtration liquid, burning the aluminium salt crystals so as to obtain purified alumina. The method solves the technical problems of complicated technologies and difficult separation of impurities in the conventional acid method, and has the advantages of prominent iron-removing effect, simple technology, easy operation, and low technology cost.

The invention belongs to the technical field of a concrete additive, in particular to a coal water slurry additive. The problems that the existing coal water slurry has poor flow dispersibility, high moisture content of coal water slurry, large loss of energy consumption and large loss of heat energy are mainly solved. The water coal slurry additive comprises the following components in parts by weight: 35 to 50 parts of naphthalene water reducing agent, 5 to 20 parts of sodium silicate, 1 to 4 parts of sodium hydroxide, 1 to 4 parts of sodium gluconate, 1 to 2 parts of sodium citrate, 1 to 2 parts of sodium lignosulfonate and 5 to 16 parts of water. The additive provided by the invention has the advantages of reducing the moisture content of the coal water slurry, improving the flow dispersibility and suspension property, speeding up the precipitation speed, reducing the used amount, and reducing the nitrogen oxide content after adding urea.

The invention discloses a method for extracting black wheat germ oil. The method comprises the following steps: 1, heating a wheat germ raw material, performing heat preservation, screening, drying an oversize product at a constant temperature to obtain a pure material, performing cold pressing on the pure material, and filtering to obtain crude oil; 2, adding an alkali liquid and the crude oil into an alkali refining tank, heating, performing static settlement, and discharging precipitate to obtain an oil material; 3, heating the oil material, subsequently adding saline water, and stirring; 4, adding saline water into the stirred oil material, and stirring; 5, adding hot water into the stirred oil material, stirring, subsequently standing, and discharging water and precipitates to obtain a washed oil material; 6, putting the washed oil material into a decoloring pot, dehydrating in vacuum, subsequently adding activated carbon, stirring, decoloring, cooling and filtering; 7, performing deodorization treatment on the decolored oil material; 8, cooling the deodorized oil material, and subsequently screening to obtain the black wheat germ oil. According to the method, a three-step washing method is adopted, so that the purity of an oil product is improved; compared with oil obtained by using an ordinary washing method, the oil product has less impurities and is higher in purity.

The invention discloses a magnetic purification system and a purification method for quickly purifying combined overflow sewage. The magnetic purification system comprises a water storage device for containing the combined overflow sewage, a sewage lifting device arranged in the water storage device, a coarse grille device arranged at a water inlet of the water storage device, a fine grille devicearranged at a water outlet of the water storage device, a charging device for feeding a material, a magnetized coagulation reaction device and a magnetic separation device, wherein the fine grille device comprises a grille pool, and a rotating drum grille and a backwash pump that are arranged in the grille pool; the magnetized coagulation reaction device comprises a mixing reaction tank; the magnetic separation device comprises a magnetic disc separator of magnetic floccules, and a slag discharge device communicated with an outlet of the mixing reaction tank; and a scraping device is arrangedbetween the slag discharge device and the magnetic disc separator. According to the magnetic purification system and the purification method, quick purification of the overflow sewage is achieved through a modular design; an integration degree is high; and the system and the method can be used for emergency treatment, are applicable to temporary treatment and can be recycled.