373 results about "Pollution water" patented technology

The invention relates to a carrier-type TIO2 photo-catalyst, it's preparing method, and a high-absorbability photo-catalysis water purifier made from said material. Said carrier-type TIO2 photo-catalyst uses active carbon fiber base as substrate, which carries 100-600mgTIO2 / g active carbon fiber to form the TIO2 film in 100-300nm thick and the specific surface area in 150-400m2 / g. Said catalyst can be attained by powder plating method, liquid deposition method and sol-gel method of adhesive agent. The invention can keep the former space between active carbon fibers with the advantages that the liquid can freely enter the inner part of photo-catalyst and the ultraviolet light can radiate the inner part of photo-catalyst. The photo-catalysis water purifier with aforementioned carrier-type TIO2 photo-catalyst is in the shape of rectangle, while several photo-catalyst elements with said catalyst are inserted into the slot of purifier, the aeration system on the bottom can mix the treating liquid with air to reduce the mass transfer limit. Said purifier can effectively absorb the action bottom material; and improve the photo-catalysis process to apply the deeply-purification treatment of micro-pollution water.

A preparation method for a combined modified straw active particulate carbon adsorption material and use of same. The preparation method for the combined modified straw active particulate carbon adsorption material comprises the following steps: 1) mixing straw powders, distilled water, a binder and a composite mineral, then pelletizing same, and then placing same in a tube furnace for pyrolysis to prepare straw particulate carbon; 2) introducing an inert gas into a modification reagent, adjusting the pH value combined and 3) soaking the straw particulate carbon into the combined modification solution for 30 min, and performing cleaning and drying, so as to obtain a combined modified straw active particulate carbon adsorption material. The combined modified straw active particulate carbon has a good adsorption effect on phosphate group in low-pollution water.

The invention relates to a method for discharging water separated, used in mixed tube of city. Wherein, it comprises: arrange diversion tube at the outlet of former discharge tube; the section of diversion tube near the discharge tube has detecting area; the detecting area is arranged with water quality detecting sensor which will transmit the detected water quality to the digit data processor; the processor will process the data to form river water quality factor, to be compared with diversion critical value, to control and select the diversion device to confirm that the water is discharged from the rain discharge tube or sewage tube. The invention can automatically divert water via water quality, to make rain into rain discharge tube and sewage into sewage tube.

The invention discloses a preparing method for green synthesis of nanoscale zero-valent iron through water hyacinth extraction liquid and application. Water hyacinth stem and leaf extraction liquid serves as a reduction agent to reduce iron ions or ferrous ions to the zero-valent iron, a chromium pollution water green repairing material-green synthesis nanoscale zero-valent iron particles are obtained through preparing. The synthesis method is low in synthesis cost, small in energy consumption, simple in process, and free of a special device, the used reduction agent is the water hyacinth stem and leaf extraction liquid, wastes are utilized, and the synthesized particles are easily agglomerated and have the beneficial effects of being good in flowability, large in specific surface area, high in stability and the like. The repairing material prepared through the method is suitable for repairing the chromium pollution water and is high in repairing efficiency.

The present invention provides a contaminated water body bottom mud reoxygenation type repairing agent, a preparation method and applications thereof. The contaminated water body bottom mud reoxygenation type repairing agent is prepared by mixing calcium peroxide, active carbon and polyvinyl alcohol according to a certain ratio, wherein oxygen can be persistently, stably and slowly released through the repairing agent. The repairing agent is directly poured to the surface of bottom mud, and the surface layer of the bottom mud is gradually changed into an aerobic state from an anaerobic state along with long time and effective oxygen release so as to promote aerobic microbial growth and metabolism, strengthen a pollutant degradation process, control releases of nutrients such as N and P in the bottom mud, and reduce a eutrophication degree of the water body, such that the water body is gradually restored to a benign ecological environment. In addition, an oxidation-reduction electric potential of the surface layer of the bottom mud is improved, and the pH value of the surface layer of the bottom mud is correspondingly changed, such that a precipitation rate of heavy metals in the bottom mud is significantly reduced, and contamination on the overlying water body is reduced.

The invention relates to a low carbon nitrogen ratio micro contaminated water nitrogen removal method. A sulphur / limestone / forest tree waste composite nitrogen removal filling material is layered and placed in a up flow reactor, and anaerobic sludge is inoculated into the filling material; HRT is set and started for 8 hours, and raw water is pumped, and a thiobacillus denitrificans medium is continuously let in for dynamic culture domestication of sludge, until stable operation; after ten days of operation, Na2S2O3.5H2O in the thiobacillus denitrificans medium is reduced to a half, and domestication is continued until a biomembrane grows mature again, and then Na2S2O3.5H2O in the thiobacillus denitrificans medium is reduced to zero, thereby microorganisms can utilize the sulphur in the filling material as sulfur source for growth and breeding; after ten days of system operation, a stable biomembrane is finally formed, and a nitrogen removal treatment of normal micro pollution water is carried out. A forest tree waste is added in the filling material according to the invention, and heterotrophic denitrifying bacterium are increased, and a mixed nutrition type nitrogen removal system is formed, and the invention has the advantages of short domestication time, good anti-interference capability, good nitrogen removal effect without secondary pollution.

The invention discloses an artificial wetland device for denitrification of low-pollution water and a treatment method thereof. The artificial wetland device for denitrification of low-pollution water comprises a constant-flow pump, an intake zone, a main body reaction zone and an outlet zone, wherein the low-pollution water is pumped into the intake zone through the constant-flow pump; an inlet hole and an intake valve are arranged in the intake zone; an outlet hole and an outlet valve are arranged in the outlet zone; a vertical upward hierarchical packing zone is arranged inside the main body reaction zone; a four-season evergreen aquatic plant is planted above the packing zone; denitrifying microbial liquid and a nutrient solution are arranged inside the main body reaction zone. By adopting the artificial wetland device, the effects of the artificial wetland in the aspect of denitrification treatment and three aspects of the plant, matrix and microorganisms are fully intensified, the denitrifying microbial liquid is prepared by screening denitrification superiority strains in the stable wetland, applied to the artificial wetland device, and matched with preferable winter evergreen aquatic plant, so as to intensify the denitrification efficiency of the low-pollution water by the artificial wetland and keep the stability in autumn and winter.

The invention relates to a river course ecological system for treating non-point source low-pollution water. According to the river course ecological system, ecological dirt blocking ditches are built at the two sides outside river banks of a river course, so that non-point source high-pollution water from agricultural runoff and rural sewage cannot directly enter the river course and is prevented from being mixed with river water to form into a large amount of low-pollution water to affect the river water quality; meanwhile, estuarine artificial wetland systems are built at outlets of the ecological dirt blocking ditches to forcefully treat sewage which is guided by the ecological dirt blocking pollutant intercepting ditches to enter the river course; and three-stage ecological bank protection comprising emergent aquatic plants, wetland plantsbog plants and shrubs and arbors is built at the inner sides of the river banks of the river course so as to improve the self-purification capacity of the water body in the river course and the flood control capacity. The river course ecological system comprehensively solves the problems of collection and treatment of the non-point source low-pollution water in terms of source pollution interception enhancing, river course self-purification capacity improving and pollution outflow controlling.

The invention relates to a composite constructed wetland used for low pollution water purification treatment of farmlands and villages. The composite constructed wetland comprises a floating plant stabilization pond, a submerged plant oxidation pond and an emergent aquatic plant / hygrophyte ecology gravel bed which are orderly set along a water flow direction, wherein the floating plant stabilization pond is planted with floating plants, the submerged plant oxidation pond is planted submerged plants, and the emergent aquatic plant / hygrophyte ecology gravel bed is planted with emergent aquatic plants / hygrophytes. The composite constructed wetland adopts an ecological engineering processing method, and the operation cost of the composite constructed wetland is low; the total nitrogen removal rate and the total phosphorus removal rate of the low pollution water of farmlands and villages can reach more than 50% and more than 60%. In the composite constructed wetland, the floating plates, the submerged plants, and the emergent aquatic plants / hygrophytes planted in the floating plant stabilization pond, the submerged plant oxidation pond and the emergent aquatic plant / hygrophyte ecology gravel bed are aquatic economic plants which are capable of generating economic benefits and are easy to popularize in rural areas.

The invention discloses a preparation method and application of a composite modified straw active granule carbon adsorption material. The preparation method of the composite modified straw active granule carbon adsorption material comprises the following steps: 1) mixing straw powder, distilled water, an adhesive and composite minerals, granulating the mixture, and then, putting the granules intoa tube furnace to be pyrolyzed to prepare straw granule carbon; 2) introducing inert gas into a modified reagent, adjusting the pH value of a solution to be 8-11, adding a ferric nitrate solution, andperforming reaction to obtain a composite modified solution; and 3) soaking the straw granule carbon in the composite modified solution for 30min, performing ultrasonic treatment for 1-12h at 1-8MPa,performing centrifugation and drying, putting the dried straw granule carbon into a muffle furnace to be fired for 2-8h at 200 DEG C, and performing cleaning and then drying to obtain the composite modified straw active granule carbon adsorption material. The composite modified straw active granule carbon has a good absorption effect on phosphate radicals in low-pollution water. The adsorption material is convenient to recover, is favorable for recycling of phosphorus resources, and has wide market application prospects.

The invention discloses a bioremediation method of chromium polluted water. A surface flow constructed wetland device is built to lead the chromium-laden plant Leersia hexandra Swartz directly to grow on the well chosen filler; the chromium in the water can be removed by the action of the filler and the plant. The chromium absorbed in the filler can be effectively taken away by periodically reaping the overground part of the Leersia hexandra Swartz to lead the filler keep better treatment effect. The method has good removal effect on chromium with different forms and has the advantages of low cost, simple operation, low consumption, easy maintenance, high chromium removal rate and no secondary pollution, etc. The method can be used for repairing and controlling the chromium polluted water produced in electroplating, smelting and leather processing. The repaired water can achieve the requirement of the national related water standard.

A method of abating water pollution wherein the body of polluted water generally has a plurality of regions. At least one of the characteristics of the pollution or the movement of the water is different in the different regions. An inventory of functional agents is maintained. Each functional agent has the ability to remediate at least one form of pollution. The functional agents are placed in a case member to form a pollution abatement package. The package is placed in the body of water and is allowed to move unattended within the body of water. The characteristics of the package are selected so that the package will move unattended to the region where the characteristics of the package are matched to the characteristics of the region. Different regions may require packages with different characteristics. The case member is composed of separate case elements. An inventory of various different case elements is maintained so that a case member having a particular set of desired characteristics such as, for example, shape, size, and density, can be selected to meet the requirements of a particular region in a body of polluted water.

Bionic water grass and its water quality reinforcement cleaning method relates to micro pollution source water treatment technology, which applies to resource-field water quality reinforcement cleaning technology to eutrophication lakes and micro pollution channels, etc. In Bionic weeds, the floating ball (1) and ecological fish reef (5) was connected flexibly with nylon cord (4),which make them sway with flow by 360degree, nylon cord coat has plastic pipes which can prevent Bionic weeds twisting together; there are many discs (2) which concatenate to nylon cord between the floating ball (1) and ecological fish reef (5) individually. The water quality reinforcement cleaning method of bionic water grass is: bionic water grass was released directly to eutrophication or micro pollution water mass, release denseness based on pollution degree of the lakes and channels, the average volume about 20%; The top of bionic water grass use floating ball to float on the water surface, the bottom fixed to ecological fish reef (5) to prevent its dispersion, the length of nylon cord (4) a little longer than the stage height.

A purifying method for river micro-pollution water body by bionic plant achieves low cost and simple process. It adopts stem, node and leaf of bionic material to produce bionic plant, they are arranged in river for purifying water body. The bottom of bionic plant is fixed on riverbed, the filling silk with rough surface adheres microbe to form biological membrane. It improves micro-pollution water body treating and purifying effect.

The invention discloses a method for cutting low-pollution water load of a venous riverway and belongs to the field of water treatment. The method comprises the following steps: (1) constructing the venous riverway by utilizing a waste riverway or a bottomland near-natural type riverway, (2) arranging an ecological floating island and a shoreside restoration belt in the upper stream of the venous riverway according to the direction of current, (3) arranging an ecological water permeable dike between the upper stream and the midstream of the venous riverway, (4) arranging a submerged type ecological bed and a biological contact oxidation bed in the midstream of the venous riverway, (5) arranging an ecological water permeable dike between the midstream and the lower stream of the venous riverway, and (6) arranging an ecological floating island and a shoreside restoration belt in the lower stream of the venous riverway. Through the application of the method, the removing rates of COD, ammonia nitrogen, total nitrogen and SS can reach over 60 percent respectively so as to make the venous riverway achieve good ecological effect and landscape effect finally. The method realizes the integration of functionality, ecology and landscape of the riverway, achieves the treating effect of clean water, green bank and beautiful scene, and provides guarantee for water quality of a river network area.

The invention belongs to the technical field of heavy metal ion detection, and provides an apparatus for detecting mercury, lead and arsenic ions in a water body based on quantum dot resonance energytransfer of intelligent equipment and a method thereof, which can be used for solving the problems of complex detection apparatus for the current heavy metals such as mercury ion, lead ions and arsenic ions as well as operation, complex data processing analysis, and difficult on-site detection analysis. The apparatus is a minisize darkroom arranged below the intelligent equipment, a glass fiber paper-based chip is fixed at bottom in the minimized darkroom, reaction zones and non-reaction zones are arranged on the glass fiber paper-based chip at intervals, an optical hardware apparatus is arranged at the top of the glass fiber paper-based chip, and a photo-taking program and a heavy metal ion concentration value calculating program are arranged on the intelligent equipment. The apparatus and the method can simultaneously detect Pb<2+>, Hg<2+>, and As<3+>, cost is low, a process is simple, and is benefit for on-site detection and analysis of heavy metal concentration in the polluted water body, detection is convenient, fast and accurate, and the apparatus and the method are benefit for experiment detection examination and convenient for real-time detection of pollution condition in the water body in life.

The invention discloses the method for preparation of emulsified nanometer zero valence iron and nanometer bimetallic. The method comprises the following steps: 1 adding the NaBH4 solution into the mixture solution of FeSO4.7H2O and stabilizing agent which is amylogen, getting the emulsified nanometer zero valence iron, the density of amylogen being 0.2-2%, the mole ratio of NaBH4 and FeSO4.7H2O solution being 2:1; 2 mixing emulsified nanometer zero valence iron and K2PdCl6 solution, carrying out reaction, entering nitrogen, when the color of solution changed from bistre to pea green, getting the nanometer bimetallic, the proportion by weight of Pd and Fe being 5-10:10000. The emulsified nanometer zero valence iron and nanometer bimetallic are used to restore the pollution water containing chlorine, nitrate anion and heavy metal. The method is simple, the specific surface area of emulsified bimetallic particle is large, the dispersity is good, and the chemical reactivity is high.

The invention relates to an in situ ecological purification method for effectively improving water quality of a riverway and belongs to the technical field of ecological treatment of a low-pollution water body. According to the method, compound ecological floating islands are built in the riverway, perennial aquatic plants are planted on the floating islands, plant roots are utilized to purify water quality and convey oxygen to the water body, elastic biological fillers are hung under the floating islands, and the elastic biological fillers provide attachment growth spaces for indigenous microorganisms; the riverway is further internally provided with a water raising and aeration device used for aeration oxygenation of the riverway water body so as to promote growth and reproduction of aerobic micro-organisms; part of the water body can be further conveyed to the other end of the riverway through a backflow water pump at one end of the riverway by means of a backflow water pipe, and circular flow is formed. Compared with the prior art, the environment for synchronous growth of the aquatic plants and the microorganisms is built in the riverway water body, flow of the water body is formed, the self-purification capacity of the water body can be effectively improved by means of the measures, and formation of a benign water ecological system of the riverway is facilitated.

The invention discloses a cultivation method for floating soil-free turf and the system of the method. The invention is characterized in that, the grains of foam and sponge are evenly mixed, filled into a bag made from non-woven fabric and sealed; then the non-woven fabric bag is passed through and fastened by a nylon silk thread; the non-woven fabric bag is divided into a plurality of small areas to fix the grains of foam and sponge; grass seeds are scattered on the non-woven fabric bag, then the grass seeds are covered by a non-woven fabric; during cultivation process, the grass grows gradually; stems and leaves pass through the above non-woven fabric coating, and roots stretch to the non-woven fabric bag below; a whole piece of land mobile soil-free turf is formed; aquatic floating soil-free turf can also be cultured by direct arrangement on water surface; during use, the soil-free turf floats on the water surface under the effect of foam grains; the sponge grains continuously absorbs and stores the water full of pollutant from water body and transports the water to the root of the grass, and water and nutrient needed by the growth of grass are supplied. The invention is mainly used for the ecological restoration of polluted water body, various sewage treatments and urban greening.

The invention discloses a method for quickly removing greasy dirt in sewage. The method sequentially comprises the following nine steps on oil-containing sewage: collecting sewage; adsorbing by an oil adsorbing felt; separating oil and water; air-floating to remove oil; carrying out ultrasonic oxidization; carrying out flocculation reaction; carrying out adsorption reaction; filtering and removing impurities; and sterilizing. High sanity water bodies can be quickly treated, so that the removal efficiency is high, the effluent quality is stable, the pollutants are substantially removed, and the requirements on reclaimed water can be satisfied. The method disclosed by the invention has a remarkable time benefit and can be used for quickly treating the polluted water body so as to avoid expansion of the pollution scope of oil.

The invention relates to a reduction system of exhaust gas pollution and its monitoring method, which are used for purifying and discharging exhaust gas generated from a ship engine. Particularly, exhaust gas generated from a ship engine started for travel of the ship comprises various harmful substances, for the way of discharging the harmful gas without purifying treatment, a current trend is to reinforce control via various treaties or regulations. The invention relates to a ship exhaust gas reduction system satisfying the control measures. Further, the invention also relates to a monitoring method for ship exhaust pollution monitoring purifying process of pollution water generated during purification of exhaust gas, and performing documenting processing.

The invention belongs to the technical field of bioengineering, and particularly discloses advenella kashmirensis 6-10-1. The advenella kashmirensis is preserved in China General Microbiological Culture Collection Center of Institute of Microbiology of Chinese Academy of Sciences, and has a preservation number of CGMCC No.13003. The invention further discloses application of the advenella kashmirensis and a microbial agent thereof to degradation on crude oil pollution water. The advenella kashmirensis disclosed by the invention is high in degradation capacity on the crude oil pollution water, and is high in environmental adaptability; meanwhile, in the process that the advenella kashmirensis degrades the crude oil pollution water, degradation concentration on crude oil in the pollution water reaches 1mL / 100mL, and recovery processing of the crude oil pollution water can be effectively implemented; the solid microbial agent of the advenella kashmirensis also has an excellent degradation repair effect on crude oil pollution soil, implements repair processing of crude oil pollution, and shows wide application prospect in biological repair of the crude oil pollution.

The invention belongs to the technical field of water pollution control and ecological remediation, and discloses a method for transforming a saline-alkali wasteland into a low-pollution water-wet land deep treatment system. The existing saline-alkali wasteland on the periphery of a lakeside zone is utilized through adaptation to local conditions, and is transformed into the compound system of a surface flow enhanced constructed wetland and a surface flow semi-natural wetland. According to the purifying system, (1) determination of a purifying area and function zoning, (2) a water inlet system, (3) terrain and base transformation, (4) hydrodynamic optimization, (5) vegetation configuration and restoration and (6) ancillary facilities and management are included. Industrial tail water with pollution loads such as suspended solids (SS), salt, BOD5, CODcr, TN and TP and low-concentration farmland drained water are introduced into the compound wetland purifying system for enhanced purification and deep purification, the purified water is drained into a lake through a shoreline wetland, and the ecological environment of the shoreline saline-alkali wetland is repaired while the water entering the lake is improved. The method is a low-pollution water treatment method which is small in investment and takes effect soon.

The invention discloses an algae inhibiting method of donaxine plant in the pollution water control domain, which comprises the following steps: 1) extracting the algae inhibiting material in the donaxine plant by water and organic solvent; 2) loading the chopped bundle of donaxine plant or donaxine in the bag; placing the bag in the disposed water. The invention is fit for lake, reservoir, river, landscape aquifer, domestic fish pond, aquarium, miscellaneous natural aquifer and artificial aquifer, which avoids secondary pollution and aquifer landscape influenced by a great amount of the doted organics in the water.

An ecological culture method for frog features optimal non-pollution water, insect source and vegetation, inculating in inculating pool whose water has the depth less than 2 cm and the temp lower than 25 deg.C, the nutritive feed for tadpole, which contains starch, protein, mineral powder, leftover of meat and tender plant, culturing tadpole in metamorphosis pool while providing high-protein feed, and deratizing 2-3 times per year.

The invention discloses a method for tracing, classifying and identifying a polluted water body by utilizing fluorescence spectrum features. The classification and identification method comprises thefollowing steps: extracting features according to three-dimensional fluorescence spectrum data, constructing a basic fluorescence spectrum database and a feature fluorescence spectrum database, constructing a basic model of fluorescence spectrum clustering by using a K-means algorithm, and taking a K-means clustering result as a mode layer and a summation layer of a PNN probabilistic neural network for training to obtain a category to which an input sample belongs. On the basis, the PNN neural network is utilized to predict an unknown sewage sample to judge the affiliation category of the unknown sewage sample. In order to obtain unknown sample matching information, basic fluorescence spectrum data of all known samples in the same category of the unknown sample and feature spectral data are brought into a comparison recognition library, the similarity matching degrees of the unknown sample and all known samples in the same category are obtained through similarity comparison calculation, the matching with a highest matching item score is optimal matching of the two samples, and the suspected traceability information of the unknown sample is obtained.

The invention discloses a sludge circular flocculation-membrane filtration reactor relating to the technical field of urban feedwater treatment and being used for treating urban drinking water with micro-pollution water quality. The sludge circular flocculation-membrane filtration reactor comprises a rapid mixing chamber, a flocculation reaction chamber, a membrane filtration chamber and a sludge regulation chamber and is matched with equipment such as a membrane production water / back washing water system, a cleaning system, a water feeding pump, a water feeding pipeline, a flocculant adding pump, a flocculant adding pipeline, a pipeline mixer, a residual sludge collection pump, a sludge backflow pump, a sludge agent adding pump, a sludge agent adding pipeline, and the like. The invention combines the advantages of two processes of membrane filtration and flocculation contact, ensures that the drinking water treatment process has the characteristics of large-sized flocculation group, good flocculation effect at low temperature, less use of flocculant, and the like by dint of the strengthened flocculation efficacy of the residual sludge, and can more efficiently control the membrane pollution as compared with other membrane processes, thereby being beneficial to long-term and stable running of a membrane filtration device.

The invention provides a nano ferric oxide-cationic polyelectrolyte coupled multielement composite flocculant, relating to an inorganic-organic composite flocculant. The invention provides a novel high-efficiency composite flocculant compounded by nano ferric oxide and cationic polyelectrolyte, wherein the nano ferric oxide is nano alpha-FeOOH, Fe3O4, alpha-Fe2O3, gamma-Fe2O3 and the like, and the cationic polyelectrolyte is polyamine, polyacrylamide, poly (diallyldimethylammonium chloride), chitosan and the like. The composite flocculant provided by the invention is applicable to micro-pollution water source strengthening treatment, the treatment effect on toxic and harmful pollutants (heavy metals, toxic organic matters and the like), humic acid and chromaticity is higher, and the composite flocculant provided by the invention has the advantages of good separating effect, rapid sedimentation, low effluent turbidity, wide pH application range and the like.

The invention provides a method and a device for measuring salt density of contaminants on the insulator surface. The device includes a water spraying device and a detecting device. The water spraying device comprises a water storing box and a spray nozzle. The water storing box is connected with the spray nozzle through a guiding pipe. The detecting device comprises a probe and a detecting device body. The probe is used for transmitting electrical conductivity in pollution water to the detecting device body to measure the salt density. The method includes: (1) wetting the surface of the contaminant insulator, (2) detecting the electrical conductivity in pollution water of step 1 through the detecting device and (3) performing a conversion from the electrical conductivity to the salt density value. According to the method and the device, the salt density distribution of different positions of the insulator surface can be measured accurately, manpower and material resources are saved, the reliability of the salt density measuring is guaranteed and the measuring efficiency is increased. Further, the method and the device are convenient, effective and rapid.

The invention provides a method for preparing a light porous sintering material from aluminum ash. The method comprises the following steps: (1) carrying out graded grinding and crushing treatment onwaste aluminum ash to remove large-particle components such as metal aluminum and the like in the waste aluminum ash to obtain fine aluminum ash; (2) fully grinding a silicon source to prepare a finesilicon source material; (3) compounding the fine aluminum ash and the fine silicon source material according to a mass ratio of 1-4:1, and fully mixing; (4) adding the mixture into a mold, and carrying out pressure molding to prepare a dry blank; (5) putting the dry blank into a high-temperature furnace, and carrying out calcining treatment to obtain a sintered blank; and (6) cutting and shapingthe sintered blank to prepare a porous material product. According to the invention, the raw materials are wide in source, only a high-silicon material is adopted as an additive, the whole preparationprocess is a dry method, and the environmental problems that aluminum nitride is hydrolyzed when encountering water to generate ammonia gas, fluoride is dissolved out to pollute a water body and thelike are solved.