316results about How to "Improve exchange capacity" patented technology

The invention discloses an organic compound fertilizer with citrus pomace and a preparation method of the organic compound fertilizer and belongs to the technical field of preparation of organic fertilizers. The preparation method comprises the following steps of reducing the acidity of the citrus pomace by adopting microbial fermentation for deacidification, decomposing nondegradable components such as pectin and cellulose in the citrus pomace by adopting a compound-enzyme preparation, carrying out composting fermentation by microbial liquid inoculant, finally adding batched materials such as urea, monoammonium phosphate and potassium sulfate, and carrying out insect killing, sterilization, granulation, drying, cooling, sieving, coating and packaging to prepare the organic compound fertilizer with rich organic matter and the contents of N, P and K meeting the need of the optimal proportion for growth of citrus. The organic compound fertilizer and the preparation method disclosed by the invention have the advantages that deacidifying yeast is adopted to reduce the acidity of the citrus pomace and replace the existing method for adding quick lime to carry out deacidification, calcification and alkalization of soil are effectively prevented, the content of the compound fertilizer is more than 55%, the pH value is 6.5-8.5, the total contents of N, P and K are more than or equal to 8%, the water content is less than or equal to 20%, the contents of trace elements such as B, Zn and Mg are rich, and the other quality indexes are superior to national standard of organic fertilizer respectively.

The invention relates to a multielement combined purification preparation process of a refined tannic acid serie and a combined preparation of the products. Gallnut or tara ultrarfine grinding material or industrial tannic acid is used as raw material and the multielement combined purification process, equipment and technologies such as extraction, freezing separation, solvent extraction, resin column separation, activated carbon absorption decoloring separation, complexation separation, membrane separation and refining separation to prepare a serie of tannic acid multielement products such as industrial tannic acid, dye tannic acid, beer tannic acid, edible tannic acid, medicinal tannic acid, reagent tannic acid, high purity tannic acid and electronic grade tannic acid, thus the integration and innovation of the green, low-carbon, environmentally friendly and energy-saving industrialized technology that tannic acid raw material is refined and processed deeply can be effectively realized. The combined technology is adopted to effectively realize the integration and innovation of the high, sophisticated, deep and sharp integrated technology that the raw material is used to prepare the serie of refined tannic acid multielement products, which is an achievement of the high and innovative technologies.

The invention discloses a method for preparing a nitrogen and phosphorus removal adsorbent from sludge of a water plant. The method comprises steps as follows: dewatered aluminum sludge is air-dried, ground, sieved, dried, cooled and then placed in a muffle furnace to be roasted at the temperature of 300 DEG C for 4 h, and activated aluminum sludge is obtained; powdery activated carbon, the activated aluminum sludge and zeolite powder are mixed uniformly in proportion, 100 mL of NaOH with the mass concentration being 2%-3% is added, the mixture is vibrated and modified for 12 h, then dried and taken out to be naturally aged for 2 h, bentonite serving as an adhesive is added for granulation, adsorbent particles are placed in the muffle furnace to be roasted at the temperature of 400 DEG C for 4 h, cooled, washed to be neutral with deionized water and dried at the temperature of 105 DEG C for 2 h, and the adsorbent is obtained. The adsorption material capable of adsorbing nitrogen and phosphorus simultaneously is prepared from the aluminum sludge containing activated carbon and zeolite, the adsorption effect of the aluminum sludge on ammonium and nitrogen in a water body is improved, and good phosphate adsorption performance is kept.

Ozonized biochar compositions and methods for creating advanced hydrophilic biochar materials are provided with higher cation exchange capacity, optimized pH, improved wettability, and free of potential toxic components. These ozonized biochar compositions are used as filtration materials, as biochar soil additives and as carbon sequestration agents to help control climate change for energy and environmental sustainability on Earth.

The invention discloses a method for modifying natural zeolite powder, which uses an inorganic alkali and sodium chloride as modification medicaments to modify the natural zeolite powder by a solution soaking method. The method comprises the following steps: firstly, mixing the natural zeolite powder and the sodium chloride, soaking the mixture in sodium hydroxide solution for an adsorption reaction, washing the product of the absorption reaction with water till the pH value of the product is neutral after the reaction is finished; and secondly, drying the product of the absorption reaction to obtain modified zeolite powder. The modification method of the invention avoids the use of organic acids and the production of toxic and harmful substances, effectively prevents low-concentration ammonian pollution of the raw water of drinking water without changing the prior drinking water treatment process, does not change the pH value of the raw water after being used, does not exert influence on the subsequent processes, and improves the ammonian adsorption performance of the modified zeolite powder by 30 to 80 percent.

The invention discloses a distributed packet switching system and a distributed packet switching method of expanded switching bandwidth. A packet switching chip divides hardware ports thereof into at least two groups and respectively provides data packet switching support for each group of the hardware ports, wherein, each group of the hardware ports provides one hardware port for various wire clip boards respectively for connection; the wire clip boards distribute flow rate of the wire clip boards to different hardware port groups for data packet switching by selecting routes based on trafficflow; and the wire clip boards control flow rate based on the hardware port groups respectively. The distributed packet switching system and the distributed packet switching method of expanded switching bandwidth can help effectively expand switching capacity among the plates based on the existing packet switching chip hardware, and have the advantages of simple and practical operation and lowercost.

The invention discloses a method for producing a high-purity potassium chloride solution for preparation of potassium carbonate and co-producing low sodium salt. The high-purity potassium chloride solution for producing potassium carbonate is prepared from agricultural grade potassium chloride serving as a raw material by the steps of rinsing, dissolving, removing impurities, settling, filtering and the like, wherein the Ca<2+> content is less than or equal to 0.0001%, the Mg<2+> content is less than or equal to 0.0001%, the Fe content is less than or equal to 0.0001%, the content of suspended solids (SS) is less than or equal to 0.1 mg / L, pH is 12+ / -0.2, and the potassium chloride content is more than or equal to 99.0%, so the quality standard of an ion exchange method for producing the potassium carbonate is complete met. Potassium chloride rinsing liquid and leachate is recycled, evaporated and concentrated, and subjected to crystallization separation according to the dissolution characteristics of the potassium chloride and sodium chloride, the potassium chloride obtained by recycling can serve as the raw materials to be reused, and the mixture containing the potassium chloride and the sodium chloride meets the quality requirement of low sodium salt.

The invention relates to a process for producing an organo-mineral fertilizer from vinasse, filter cake and generally boiler ashes, as byproducts of the sugar and / or alcohol manufacture and, optionally, complemented with fertilizer sources composed of macronutrients (primary and secondary) and micronutrients. The process comprises, in a preferred form of the invention, the steps of: concentrating the vinasse until about 65% of solids (p / p); mixing and dissolving the fertilizer elements in the concentrated vinasse; mixing and drying the filter cake and ashes in a hot gas stream obtained by burning bagasse or fine straw; impregnating this dry mixture with the concentrated vinasse mixture and the added fertilizer agents; and, finally, drying and granulating the final formulated mixture. The end product is a granular solid containing N, P, K, Ca, S, Mg and micronutrients, according to the previously programmed formulation. In the other form of the invention, the same process is effected, but without adding the fertilizer elements.

A contactless power transfer system comprising a power exchanging coil configured to exchange power via a magnetic field, a field focusing element for focusing the magnetic field, and a compensation coil having a resonance frequency different from a resonance frequency of the field focusing element for matching an impedance of the contactless power transfer system and compensating a change in phase resulting from a misalignment in the contactless power transfer system.

The invention discloses a composite ionic adsorption material which is a spherical particle prepared by taking 80-85 parts of zeolitefine powder subjected to water bath modification by 0.8-1.0mol / L NaCl solution, 10-20 parts of medical stone fine powder, and 10-20 parts of kieselguhr fine powder as base materials, and 6 parts of activated carbon powder as a pore former and firing, wherein the diameter of the spherical particle is 2-12mm, and the pore volume of the spherical particle is 0.645-0.650 cm<3> / g. Activated zeolite is added to medical stone and kieselguhr to prepare the novel compound ionic material, and the zeolite, the medical stone and the kieselguhr jointly exert adsorption effects. The salt modified zeolite and medical stone increase an ionic exchange space and internal surface area, so that the adsorption capacity of the prepared composite adsorption material is further improved, and a better adsorption effect is achieved.

The invention provides a stormproof dual-net wall close type net cage, and belongs to the field of aquaculture net cages. The stormproof dual-net wall close type net cage comprises a net cage frame, an aquaculture net is hung on the net cage frame, and the net cage frame is uniformly connected with connecting arms, an outer layer aquaculture net and an inner layer aquaculture net are suspended on the connecting arms, and the inner layer aquaculture net is sleeved in the external layer aquaculture net; water supply equipment is arranged on the net cage frame, a lift pump is arranged on the water supply equipment, and a water pumping pipe of the lift pump extends into the seawater out of the net cage; a water outlet of the lift pump is connected with a water inlet pipe, the water inlet pipe extends into the net cage; the water outlet is arranged on the water inlet pipe, and the water outlet and the net cage frame tangent line at a corresponding position thereof present an angle at 30 degree; the bottom of each of the outer layer aquaculture net and the inner layer aquaculture net is connected with a dirt collecting device, thereby effectively avoiding the conditions that the fish in the net cage is injured due to larger storm and the net cage is damaged in the large storm, and the water body exchange capacity is strong.

The invention discloses a double-layer coated slow-release nitrogen fertilizer for improving saline-alkali soil. The nitrogen fertilizer is composed of the following raw materials in parts by weight: 55-70 parts of urea, 22-30 parts of ammonium phosphate, 35-50 parts of acrylic acid, 15-25 parts of wheat straw, a right amount of distilled water, 2-7 parts of potassium hydroxide, 0.5-2 parts of sodium borohydride, 10-16 parts of humic acid, 8-12 parts of anhydrous sodium sulfite, 5-9 parts of formaldehyde solution, 3-7 parts of ammonium persulfate, 1-3 parts of N,N'-methylenebisacrylamide, 9-16 parts of sodium alginate, a right amount of 5% calcium chloride water solution, 2-4 parts of paraffin, 2-4 parts of furfural residue, 4-10 parts of attapulgite clay, 2-5 parts of dilute sulfuric acid and a right amount of sodium hydroxide solution. According to the invention, the humic acid is modified to enhance the water solubility, and the urea fertilizer effect and the nitrogen utilization ratio are increased, thereby improving the water absorption property, water retention property and salt tolerance of the slow-release fertilizer.

The invention relates to an injection molding impeller of an automatic aerator. The injection molding impeller is mainly composed of a conical body, blades, a fixed plate, an upper support plate and a lower support plate and the like, wherein the fixed plate is provided with a connection hole; the fixed plate is connected with the conical body through the upper support plate and the lower supportplate; the outer conical surface of the conical body is connected with a plurality of blades; the back side B of each blade is provided with a reinforcing rib to support the blade; and a window is arranged in the space of the reinforcing ribs. The mold of the automatic aerator is mainly composed of a movable die, a stationary die and the like, wherein the movable die is provided with a main core and a plurality of subsidiary cores; the subsidiary cores enter the stationary die; the sides of the subsidiary cores are matched with the stationary die to form the upper support plate and the window; the main core is arranged in the mold; the cavity of each blade is provided with a movable block and a stationary block; the movable blocks are connected with an angle ejector rod; a workpiece and the angle ejector rod are pushed out together by a demoulding mechanism in demoulding; the movable block slides out obliquely by virtue of the angle ejector rod; and the workpiece is straightly pushed out under the guiding of the subsidiary core and is separated from the movable block.

Surface-oxygenated biochar compositions and sonication-ozonization methods create advanced hydrophilic biochar materials having higher cation exchange capacity, optimized pH, improved wettability, and toxin free components. These sonicated and ozonized biochar compositions are used as filtration materials for clean water and air, as phosphorus solubilizing reagents to mix with phosphate rock materials to make a slow-releasing phosphate fertilizer, as biochar soil additives to help solubilize phosphorus and reduce phosphorus fertilizer additions required to achieve desired soil phosphorus activity, crop uptake, and yield goals, as sand soilization reagents by utilizing their liquid gel-forming activity in the spaces among sand particles to retain water and nutrients and hold the sand particles together, as plant growth stimulants by using the humic acids-like surface-oxygenated biochar substances at a proper ppm concentration and as carbon sequestration agents to help control climate change for energy and environmental sustainability on Earth.

The invention discloses an orange peel dregs seedling raising substrate and a preparation method thereof, and belongs to the technical field of preparation of seedling raising substrates. Fermented orange peel dregs subjected to microorganism fermentation de-acidification, composite enzyme preparation degradation and microorganism liquid bacterial agent composting fermentation are used as a raw material; shaximiao group purple soil is used for replacing non-renewable resources such as turf, perlite, and vermiculite to scientifically compound a soil insecticide so as to obtain the seedling raising substrate which is free of weeds and pests, good in physical property, reasonable in hygroscopicity, excellent in air-conductivity, reasonable in PH value, strong in ion exchange capacity, balanced in nutrition, high in seedling emerging rate, and regular and strong in seedlings. The preparation method disclosed by the invention is simple in process and low in requirement on equipment, the orange peel dregs are fermented for 12-15 days, the pest killing and sterilization of the seedling raising substrate is 5-7 days at most, the preparation method saves 18-20 days as compared with the prior art, not only is the raw material cost of the seedling raising substrate greatly lowered, but also the production period is shortened, and the preparation method is not restricted by factors such as weather, and can achieve mass production at any time.

The invention relates to a designing method for improving the encircled-type harbor basin water body exchanging capacity. The designing method is characterized by mainly comprising the steps that 1 a plane two-dimensional convection and diffusion mathematical model is established; 2 the harbor basin water body exchanging capacity is evaluated; 3 the encircled-type harbor basin water body exchanging mechanism is analyzed; 4 engineering proposal calculation is conducted, and main factors influencing water body exchanging function improvement are analyzed; 5 an engineering improvement scheme capable of improving the encircled-type harbor basin water body exchanging capacity is formed. According to the designing method, the relation between convection and diffusion and the main factors influencing harbor basin water exchanging can be obtained by calculating harbor basin Peclet number distribution, therefore, the mechanism for improving the encircled-type harbor basin water body exchanging capacity is disclosed, optimization design can be conducted on a scheme for arranging a water body exchanging channel, and accordingly, the harbor basin water body exchanging capacity is improved.

The invention discloses compounded bee pollen and a preparation method thereof. Bee pollen is adopted as a main raw material, natural plant source enzymes with high enzyme activity and rich enzyme systems and pupa intestinal tract extract including queen bee larva and drone pupa saliva with the most original bee pollen forming process and the most complete enzyme systems and intestinal tract enzyme systems are scientifically compounded, the microwave high-temperature instant puffing technology and the probiotic fermentation technology are adopted, fast, effective and deep wall breaking is carried out on the bee pollen through special biological enzymolysis, microwave high-temperature instant low-temperature puffing and probiotic fermentation, wall-broken bee pollen is prepared and then is scientifically compounded with one or more functional auxiliary materials, the healthcare bee pollen with the high wall breaking rate, high efficiency, low cost and high functionality is prepared, and the natural flavor and nutritional ingredients of the bee pollen are kept to the maximum extent.

The invention belongs to the field of heavy metal and polycyclic aromatic hydrocarbon composite pollution repairing in polluted environments, and discloses a method for repairing heavy metal and polycyclic aromatic hydrocarbon composite polluted soil. The method comprises the following steps: (1) performing pretreatment on the soil; (2) performing high-temperature thermal desorption; (3) performing stabilizing treatment; and (4) performing stabilizing maintenance. Polycyclic aromatic hydrocarbon organic pollutants are removed from the heavy metal and polycyclic aromatic hydrocarbon composite polluted soil through high-temperature thermal desorption, and the heavy metal is subjected to stabilizing treatment through a stabilizing agent, so that the method is simple to operate, high in repairing efficiency, large in treatment quantity and environmentally-friendly.

The invention discloses probiotic dry red wine and a preparation method thereof. The preparation method includes that dry red wine and rose flowers are used as raw materials, and low-temperature extraction technologies like high-voltage pulse electric field, microwave, ultrasound and biological enzymolysis are organically combined, so that functional substances and fragrant ingredients of the rose flowers can be retained to maximum extent; probiotics like functional Lactobacillus plantarum are used as fermentation agents, and temperature-variable fermentation and graded inoculation are adopted, probiotic multiplication and accumulation of functional metabolite can be realized to maximum extent, malic acid in the dry red wine can be further converted into lactic acid, acor of the dry red wine can be eliminated, and taste, healthcare function and wine stability of the dry red wine can be improved; the high-voltage pulse electric field, ultrasonic technology and peracetic acid are combined to accelerate aging, so that the probiotic dry red wine obtained has quality equivalent to that of existing fermented common dry red wine after aging for 8-10 years, and is good in aging effect, short in period and high in efficiency.

The invention discloses a preparation method for a proton exchange membrane fuel cell catalyst. The adoption of a surfactant and a stabilizer is avoided, the preparation method is easy to operate, safe and convenient, and the preparation efficiency is greatly improved; acid is added as a precipitant, so that the precipitation time of the catalyst is greatly shortened, and the process efficiency is improved; a drying process of the catalyst is rapidly finished by a spray drying technology, and materials sprayed in the drying process are instantaneously heated by high temperature only when being sprayed into spray particles, so that the phenomenon of agglomeration of the catalyst is reduced, and the electrochemical activity of the platinum-carbon catalyst is kept high after the catalyst is dried; moreover, by the spray drying technology, the preparation time of the catalyst is further reduced, and the preparation method is easy to realize industrial production, and has broad market prospect.

The adaptive program calling method for information exchange in heterogeneous environments comprises: converting the product model data into the object model then the extended mark language file; converting last file into neutral-format data flow by the extended mode list language to load into the knowledge base and realize the mapping between data and KB case. This invention reduces the development cycle to respond market change.

The present invention provides one kind of internal service system for hierarchial exchange network and its management and control method, and belongs to the field of computer network technology. The internal service system for hierarchial exchange network has system frame attached to the hierarchial exchange network, and each node domain has one or several service nodes with services of different types except exchange nodes. On one hand, the management and control inside the node domain is realized via service protocol; and on the other hand, the mutual operation between node domains is realized via the interaction of service message. Thus, the internal service system for hierarchial exchange network can provide various internal services. The present invention ensures the discrepancy and variety of service while raising the network interacting performance, and is favorable to service management and network safety.

The present invention relates to composition combined with natural plant and its preparation method, especially relates to preventing altitude sickness composition and its preparation method. A preventing highland reaction food composition produced by following weight and percentage of the raw materials: red common stonecrop herb 8 to 20 percent, safflower 8 to 20 percent, ginkgo biloba leaves 1 to 80 percent, lanceolata 1 to 70 percent. The method for manufacturing bagged tea of the said preventing altitude sickness food composition is that drying red common stonecrop herb 8 to 20 percent, safflower 8 to 20 percent, lanceolata 1 to 70 percent, and ginkgo biloba leaves 1 to 80 percent under 30 to DEG C and mixing grinding; sieving 40 to 60 mesh sieve, packaging bagged tea, external packing adopts vacuum package. The present invention advantages is that providing a tea, oral liquid, capsule and granule composition and its preparation method, with anti- hypoxia, anti-fatigue, anti-radiation, blood-activation and stasis-eliminating, promoting blood cycle in brain, enhancing immunity effects, and the effects are striking, suitable for each kind symptoms of altitude sickness, without side effects and non-toxic.

The invention discloses an orchard deep soil oxygen therapy soil loosening fertilizer applicator and an application method thereof; the orchard deep soil oxygen therapy soil loosening fertilizer applicator comprises a gasoline engine connected with a hollow drill rod; a high pressure air tank is connected with the hollow drill rod; an air valve is arranged between the high pressure air tank and the hollow drill rod; the most bottom of the hollow drill rod is provided with a drill bit; the hollow drill rod above the drill bit is provided with air outlets; the high pressure air is conveyed to the deep soil so as to realize oxygen therapy and soil loosening purposes; the oxygen therapy can promote root breathing effect so as to improve root growth vigor, thus reducing root reductibility toxicity and root rot generation; the soil can be loosened so as to reduce root growth resistance, thus enhancing soil air and atmosphere exchange capability, and promoting root growth; in addition, holes arranged in the deep soil allow a nitrogen phosphor potassium water-soluble ternary composite fertilizer to be filled in, thus applying fertilizer to the soil deep part.

The invention provides a winter pond net cage intermediate culture method for stichopus japonicus larvae. The method comprises the steps of selecting a culture pond with a water depth of 1.8m-2m; erecting net cages, with the top surfaces of the net cages being 5cm-10cm lower than a water surface; making W-type adhering substances with 6 mesh-10 mesh polyethylene nets and distributing the adhering substances in the net cages uniformly; performing daily management of adjusting the water quality of pond water, and putting larvae in the pond at the end of October or at the beginning of November, with the stocking density being 0.5Kg per net cage to 0.7Kg per net cage; increasing light illumination in an icebound period in winter and monitoring under-ice water quality indexes; after ice melts, starting an oxygenation apparatus to promote vertical flow of water and improve the water quality environment; when larvae in the cages reach 250 / kg-300 / kg at the end of April, selling the larvae as commercial larvae for culture. The method can increase the culture space after the water is icebound, create the optimal environment for overwintering of sea cucumbers, greatly increase the effective usage area of adhering substances, reduce the production cost of larvae, basically guarantee all-weather production all year round, increase the culture survival rate and body wall production rate, and guarantee the quality of adult sea cucumbers.

The invention discloses a reader-writer which is applicable to a wireless real-time positioning system. The reader-writer comprises a control unit and a radio frequency unit, wherein the control unit is connected with the radio frequency unit through a wire; the radio frequency unit comprises three radio frequency channels; and each radio frequency channel comprises a radio frequency module and an antenna. Due to the adoption of the technical scheme, one reader-writer comprises the three radio frequency channels, so data exchange capability is enhanced and tag capacity supported by the real-time positioning system is expanded; meanwhile, by a diversity receiving method, the reader-writer acquires a plurality of fading signals which are counted independently and carry the same information and combines the plurality of received independently counted fading signals so as to reduce the influence of fading and acquire more accurate signal intensity information.

The invention discloses an electrotinning method for a printed circuit board. The electrotinning method comprises the following steps of: (1) tinning pre-processing process; (2) tinning process and (3) tinning post-processing process, wherein the tinning process in the step (2) comprises the following steps of: (J) primary tinning: carrying out tinning on a workpiece in a tinning cylinder by utilizing tinning liquid, so as to obtain a second workpiece, wherein the soaking time of the workpiece in the tinning liquid is 1-3 seconds; and (K) secondary tinning: carrying out the secondary tinning on the second workpiece in the tinning cylinder by utilizing the tinning liquid. According to the electrotinning method disclosed by the invention, the tinning process comprises two tinning steps; by utilizing the tinning method, when the costs of the time and raw materials are scarcely increased, the liquid medicine wettability is increased, the bubbles are reduced, the tinning is uniform in holes, a copper-free state in tinning bubble holes is avoided, and the quality requirements of electroplating can be well met.

The invention discloses a preparation method of an activated graphene oxide adsorbent for removing tetracycline. The preparation method comprises the following steps: according to percentage by mass, namely the ratio of purified graphite oxide to KOH powder of 1 to 4, grinding and uniformly mixing the purified graphite oxide and the KOH powder in an agate mortar so as to obtain mixed powder; adding the mixed powder to a ceramic pipe, then adding to a quartz tube furnace, calcining at 750 DEG C for 2h in N2 protective effect, then reducing temperature at temperature decreasing rate of 30 DEG C / min, and turning off nitrogen when the quartz tube furnace is cooled to room temperature so as to obtain the activated graphene oxide adsorbent for removing tetracycline. The activated graphene oxide adsorbent for removing tetracycline, disclosed by the invention, can improve the specific surface area and the hydrophilicity of the graphene oxide, and greatly improve the adsorption performance of a water solution to tetracycline. The preparation method disclosed by the invention is simple in process, and since a conventional chemical reagent is adopted in a preparing process, cost is saved.

The invention discloses a restoration agent and a preparation method thereof and a method using the restoration agent to restore heavy metal-polluted soil, and belongs to the technical field of restoration of heavy metal soil pollution. The restoration agent is prepared from the following raw materials of biochar, sepiolite, monocalcium phosphate, sugarcane residues, lime powder, longan peel, tartaric acid, hydroxyethyl triphosphate, potassium lignosulphonate, malic acid, chitosan and soybean straw. The restoration agent is prepared by the following steps of powder preparing, fermenting, powder drying and the like. The restoration agent has the advantages that the preparation technology is simple; when the restoration agent is used for restoring the heavy metal-polluted soil, the removal rate of mercury, cadmium, lead, arsenic and pyrene is increased.

This invention discloses a method for preparing stable acidic silica nanosol with a high concentration used for large-scale integrated circuit. The method comprises: performing cation-anion-cation exchange to purify the silica nanosol; (2) adding polyether nonionic surfactant to the silica nanosol at a vol. ratio of (1-10): 1000; (3) adding an acid to the silica nanosol to adjust the pH value. The method can purify the silica nanosol as well as ensure the stability of the silica nanosol. The method has such advantages as simple process, high efficiency, low equipment cost, short preparation time, and low energy consumption.