160results about How to "Absorptive" patented technology

The invention provides a method for preparing sulfur and nitrogen co-doped titanium dioxide with visible light catalytic activity, which adopts a sol-gel method and comprises the following steps: hydrolyzing titanium ester and introducing sulfur and nitrogen sources to obtain a titanium dioxide sol, wherein the sulfur and nitrogen sources are from thiourea solution; in a sol system, dropwise adding 1 to 5 percent saturated aqueous solution of thiourea to perform the hydrolysis reaction to obtain the sol; then performing aging and volatilizing a diluent to obtain a titanium dioxide gel; drying the titanium dioxide gel and grinding into powders; performing heat treatment on the solid powder; and calcinating to obtain sulfur and nitrogen co-doped titanium dioxide nano powder. In the method, the thiourea is used as the raw materials of the nitrogen and sulfur sources, the sulfur and the nitrogen are simultaneously introduced in the process of the hydrolysis reaction of the sol to achieve synergistic effect and improve the reaction efficiency, raw material consumption is less, the process is simplified, the absorption range of visible light is effectively improved, the wavelength of the visible light is expanded to about 650nm, and the sulfur and nitrogen co-doped titanium dioxide has obvious visible light activity in the photocatalytic degradation reaction of organic pollutant molecules.

The invention is titanie oxide light catalyzing film which comprises nitrogen and the manufacturing method, it refers to semiconductor light catalyzing technology field, especially refers to titanie oxide light catalyzing film field. It contains nitrogen which accounts for 0.1-5%; the manufacturing method is magnetism control sputtering method, the character lies in: the reaction gas in the mixed gas of high purity oxygen and nitrogen, the nitrogen content is 5%-95%. The film decreases the forbidden bind breadth of semiconductor light catalyst, makes the film has absorption ability to visible light, and it has catalyzing and decomposing ability to the organic contamination by the irradiation of visible light. Compared with pure titanie oxide light catalyzing film, its decomposing ability is enhanced greatly by the irradiation of ultraviolet.

The invention discloses a modular reconfigurable crawler-type wall climbing robot, consisting of seven or more than seven absorption joints. Each absorption joint comprises a U-shaped frame, a bracket, a shell A, a shell B, a shaft, a shaft sleeve, a steering engine, an electromagnet, a sucker A and a sucker B; the sucker A is arranged on the shell A; the sucker B is arranged on the shell B; the steering engine and the shaft are arranged on the bracket; the shaft sleeve is arranged on the U-shaped frame; the shell A and the shell B are connected and form a cavity used for arranging the electromagnet; the U-shaped frame is connected with the shell A; and the bracket is connected with the shell B. The modular reconfigurable crawler-type wall climbing robot forms a serial crawler-type structure of the robot by the U-shaped frame of the former absorption joint and the output shaft and shaft of the steering engine of the latter absorption joint so as to lead the robot to have the feature of multiple degrees of freedom. The crawler-type robot which is formed by adopting connection of seven or more than seven absorption joints with identical structures enhances the motion flexibility, absorption reliability and obstacle-climbing capability of the robot.

The invention provides a submerged plant modularized growth bed and a method for recovering growth of underwater submerged plants. The submerged plant modularized growth bed comprises suspended solids, planting layers, plant layers, a growth substrate layer, a bearing layer and balance weight facilities, the submerged plant modularized growth beds are mutually connected to form an entire piece, micropores are formed in the bearing layer so that roots of the plants can penetrate through, the growth substrate layer adopts planting soil, the periphery of the planting layer is fixedly connected with the periphery of the bearing layer, the planting layers and the bearing layer wrap the growth substrate layer, the suspended solids are fixedly arranged around the submerged plant modularized growth bed, each suspended solid is hollow and is filled with air, and the balance weights are fixedly arranged at the lower end portion of the suspended solids to keep the depth of the modularized growth bed suspending on the water surface. The submerged plant modularized growth bed is reasonable in design, compact in structure, simple to manufacture, low in cost, simple to operate and convenient to manage, and the submerged plant modularized growth bed is degraded along with the growth of the underwater submerged plants, is free of pollution, protects the environment, is wide in application range, is widely popularized conveniently, and is favorable for recovery of the underwater submerged plants in different water areas.

The invention discloses a method for inducing human umbilical cord mesenchymal stem cells in vitro into liver cells and application thereof. The method comprises the following steps of: at the culture logarithmic growth phase of human umbilical cord mesenchymal stem cells, adding a liver cell induced differentiation culture medium and performing differentiated induction to obtain the liver cells formed by the differentiation of the human umbilical cord mesenchymal stem cells. The liver cell induced differentiation culture medium consists of the basic culture medium is an IMDM culture medium containing 10 to 70 ng / ml of liver cell growth factor, 3 to 30 ng / ml of fibroblast growth factor, 4.5 to 50 ng / ml of oncostatin, 2 to 40 ng / ml of alkali fibroblast growth factor, 20 ng / ml of epidermal growth factor, 1 mu M of dexamethasone and 50 mg / ml of ITS+premix. The method has the characteristics of one step method, simplicity, high repeatability, short duration time of differentiation process and good induced differentiation effect. The method can be applied to the research on turning mesenchymal stem cells into liver cells by induced differentiation.

This invention discloses a method for removing sulfur-containing compounds from fuel oil by phase-transfer catalytic oxidation. The method comprises: preparing six types of heteropolyacid quaternary ammonium salts as the phase-transfer catalysts from quaternary ammonium salts and phosphomolybdic acid / tungstophosphoric acid, mixing the phase-transfer catalysts, fuel oil, and peroxyformic acid oxidant (prepared from H2O2 and formic acid at a weight ratio of 3.5:(1-1.5)), reacting at 25-55 deg.C under ultrasonication for 1-2 h, and separating fuel oil and peroxyformic acid to obtain desulfurized fuel oil. The method avoids adsorption and extraction procedures due to the heteropolyacid quaternary ammonium salts phase-transfer catalysts, and has such advantages as simple process, and high reaction rate. The catalyst has such advantages as no toxicity and no pollution, and is recyclable and environmentally friendly.

The invention relates to the field of titanium dioxide photocatalyst, in particular to the field of a film loading type iron nitrogen co-doping titanium dioxide photocatalyst. The invention provides a preparation method for a flexible carrier (LDPE) film loading type iron nitrogen co-doping TiO2 catalyst. The catalyst contains an active constituent and a carrier. The iron nitrogen co-doping titanium dioxide, as the active constituent of the loading catalyst, is loaded on a low density polyethylene film carrier. The preparation method for photocatalyst is the sol-gel method. The loading method for catalyst is the dipping sediment-thermal treatment method. The invention has excellent photocatalysis oxidability under visible lights, has simple preparation process and can be reused.

The invention discloses a full-range sound absorption member as well as a relevant fabrication method. In the full-range sound absorption member, a surface punched sound absorption plate comprises a metal sheet; a micropunched sound absorption film is composed of a macromolecule non-metal material; the micropunched sound absorption film can fulfill crossed winding along folding lines on both sides to support racks to supports the surface punched sound absorption plate and the protection panel, and moreover, form a triangular resonance cavity; meanwhile, the micropunched sound absorption film can realize crossed connection along folding lines to support the surface punched sound absorption plate and the protection panel on both sides, in order to form a triangular resonance cavity. The invention adopts a numerically-controlled device to perform fabrication, utilizes a combination of a double-layer micropunched sound absorption film (sheet) resonance sound absorption structure with the surface punched sound absorption plate resonance sound absorption structure; meanwhile, the depth of the background resonance cavities are all continuously transitted, so that the full-range sound absorption member can guarantee that noise adsorption performances in all freqhence ranges can reach perfect effects. Therefore, the invention adapts to places with higher purification requirements and needing denoise measures.

The invention discloses insect-inhibiting long-acting yield-increasing environment-friendly inorganic fertilizer and a preparation method thereof. The insect-inhibiting long-acting yield-increasing environment-friendly inorganic fertilizer is prepared from the following raw materials in parts by weight: 10-16 parts of traditional Chinese medicinal residual materials, 2-4 parts of tobacco waste residues, 15-25 parts of waste straws, 7-9 parts of excrement, 5-7 parts of agricultural product processing waste, 4-6 parts of kitchen waste, 3-5 parts of mineral powder, 0.5-1 part of fulvic acid potassium salt, 3-5 parts of plant ash, 0.01-0.03 part of fermenting strain, 1-3 parts of humus soil, 0.5-0.7 part of nutrient additives, 3-5 parts of shell powder and 1-2 parts of modified bamboo charcoalpowder. The inorganic fertilizer is rich in multiple nutrient substances, can be used for greatly reducing occurrence of insect pests, is environment-friendly and residue-free, has the effects of long acting, yield increasing and soil improving, can save resources and reduce use of chemicals since a great amount of industrial and agricultural wastes are adopted, and has a relatively high practical value and excellent application prospect.

The invention discloses a bismuth vanadate composite photo-catalyst co-modified by silver and phosphorous-modified graphite-phase carbon nitride nano-sheets, and a preparation method and an application of same. The composite photo-catalyst includes bismuth vanadate particle, which modifies the surface of phosphorous-modified graphite-phase carbon nitride nano-sheets to form PCNS / BiVO4, and elementary silver modifies the surface of the PCNS / BiVO4. The preparation method includes the steps of: preparing a suspension liquid, preparing the PCNS / BiVO4, and supporting the silver. The composite photo-catalyst has high photo-catalysis activity and good stability. The preparation method is simple in operation and processes and is low in cost. The composite photo-catalyst can be used for treating antibiotics wastewater and has simple application method, low cost, high removal rate on antibiotics, stable photo-catalysis performance, good repeatability, etc.

The invention provides a reactable gel plugging agent and a preparation method thereof. The preparation method comprises the following steps: 1, reacting formaldehyde, melamine and a sulfonating agent in an alkaline environment to obtain an intermediate; and 2, reacting the intermediate, vinyl monomers N,N-methylenebisacrylamide and an inorganic material under the action of an initiator to obtain the gel plugging agent, wherein the vinyl monomer are two or more of acrylamide, N,N-dimethylacrylamide, vinyl pyrrolidone, N,N-diethylacrylamide and 2-acrylamide-2-methylpropanesulfonic acid; and the inorganic material is calcium soil, silicon powder and wood powder. The gel plugging agent can chemically polycondensate in a loss channel to realize the solidification, cementation and adsorption effects, and the loss channel and the plugging agent are cemented to form an integral body, so the bearing strength and the plugging effect are improved, and repeated loss is reduced. The invention also provides the reactable gel plugging agent.

The invention discloses a method for separating and preparing anti-tumor components ganoderic acid C1 and ganoderic acid F, which comprises the following steps: (1) primarily enriching and purifying the alcohol extract of lucid ganoderma by use of macroporous resin, and separating a ganoderic acid part with purity of 30-60% from the alcohol extract of lucid ganoderma; (2) separating the separated ganoderic acid part through high-speed counter-current chromatography to obtain ganoderic acid with relatively high purity, wherein a solvent system consists of petroleum ether, ethyl acetate, methanol and water at a volume ratio of 5:(3-7):(1-6):(4-9); the upper phase of the solvent is a stationary phase, and the lower phase is a mobile phase; a sample is dissolved with the lower phase solution and fed; the flow velocity of the stationary phase is 10-20mL / min, the flow velocity of the mobile phase is 1.5-3mL / min, and the rotation speed of the host is 600-1,000rpm; the separated object is collected by an automatic fraction collector, and one fraction is collected from every 4-10mL; (3) analyzing and detecting the components of the liquid collected by each test tube by high performance liquid chromatography, collecting, concentrating and drying according to different components, and separating to obtain ganoderic acid C1 and ganoderic acid F with purity up to 95%. The method has the characteristics of high efficiency, high speed, large separation quantity, high recovery rate, solvent saving and the like.

The invention discloses a production method of an ammonium sulfate-ammonium phosphate composite fertilizer. The composite fertilizer adopts the conventional ammonium phosphate double tubular reactor process; materials required for production mainly comprise strong phosphoric acid with concentration (P2O5) of 40 percent to 48 percent, anhydrous liquid ammonia with high purity and concentrated sulfuric acid with concentration of 90.0 percent to 98.5 percent; the strong phosphoric acid, the liquid ammonia and the concentrated sulfuric acid enter a tubular reactor in a certain ratio according to the specification of the product, neutralization reaction is performed to generate mixed slurry of ammonium sulfate and ammonium phosphate and ammonification and pelletization are carried out by a drum to form the ammonium phosphate-based nitrogen-phosphorus-sulfur (NPS) composite fertilizer. The product disclosed by the invention is rich in nutritional ingredients, such as ammonium nitrogen, soluble phosphate and soluble sulfate, so that the requirements of plant production for nitrogen, phosphorus and sulfur elements are met effectively, the functionality of the ammonium phosphate composite fertilizer is expanded, the added value of the product is improved, and an effective way is provided for promoting diversification of the fertilizer product.

The invention discloses a formaldehyde room-temperature oxidation composite carrier catalyst prepared with a sol gel-soaking method. The catalyst is composed of a granular carrier, titanium dioxide with which the granular carrier is dipped and coated and a metal active component, wherein the metal active component is precious metal or a mixture of precious metal and alkali metal. The catalyst is prepared with the continuous method, soaking of titanium sol and soaking of the metal active component are continuously completed, the high-temperature roasting step of a traditional sol-gel method forpreparing titanium dioxide is omitted, the granular carrier is dipped and coated with nanometer titanium dioxide with the sol-gel method to form the composite carrier, and the composite carrier can have the dual effects of loading the metal active component and adsorbing formaldehyde. The content of the precious metal of the catalyst is extremely low, formaldehyde with the high concentration canbe completely catalyzed and oxidized into carbon dioxide and water at the room temperature, and the catalyst has excellent catalytic activity and selectivity and the long service life, and is suitablefor industrial scale production. The catalyst is suitable for the field of air purification, industrial waste gas treating and the like, particularly, is suitable for formaldehyde treatment after indoor decoration.

A decorative wall board with an air purification function comprises an anti-bacterial non-woven fabric. An activated carbon fiber layer, an anion air purification layer, a waterproof breathable membrane and a bamboo charcoal wall board body are sequentially bonded on the anti-bacterial non-woven fabric in a hot-pressing mode, and according to the anion air purification layer, by weight, 4 parts of tourmaline powder, 2 parts of lanthanide series rare earth compound salt, 2 parts of nanometer titanium dioxide, 3 parts of activated carbon powder and 0.5 part of nano silver are loaded on polyester fiber. According to the decorative wall board with the air purification function, a traditional anion adding material is utilized, and the activated charcoal powder and the small amount of nanometer silver are added, so that release of anions is effectively promoted, and meanwhile the effects of sterilization and disinfection can further be achieved.

The invention relates to a preparation method of a heat-conducting polyvinyl chloride (PVC) composite material with microwave absorption characteristic. The preparation method comprises the following steps of: fully plasticizing PVC resin, a thermal stabilizer, a lubricant, a processing auxiliary agent and a plasticizer to obtain a PVC premix; and adding into a haake internal mixer together with multi-wall carbon nanotubes and zinc oxide for internal mixing to prepare the heat-conducting polyvinyl chloride composite material with microwave absorption characteristic. Compared with the prior art, the adopted multi-wall carbon nanotubes and zinc oxide have synergistic wave absorption and heat conduction effects; and when the PVC content is 100 parts, the using amount of the carbon nanotubes is 5 parts and the using amount of the zinc oxide is 10 parts, the coefficient of thermal conductivity of the PVC composite material is 0.366 W / (mk), the lowest reflectivity is -32.7dB, and the frequency range is 3.12 GHz when the reflectivity is lower than -10dB.

A composite air filtering material for the indoor air conditioner is prepared from a non-woven polarized polypropene cloth as filtering layer and a composite oxide layer containing photocatalyst nanoparticles through needling. Said filtering layer is composed of a non-woven polarized polypropene cloth and the surface-treated magnetic nanoparticles attached to said non-woven cloth.

The invention provides an engine oil pin position sensor detecting circuit. Square signals from a controller CPU are converted into two paths of standard same-frequency sine wave signals through a square wave-to-sine wave circuit, and the same-frequency sine wave signals are amplified by a reverse operational amplifier and are respectively output to an oil pin position exciting output unit through two paths of power output amplifiers; sine waves output by an exciting sine wave amplification stage are shaped into three paths of standard same-frequency grounding square signals through a comparator and a shaping circuit, the same-frequency grounding square signals are fed to a sine-wave-to-half-wave unit set of an oil pin position exciting channel, an SIN channel and a COS detecting channel, the lower half circle of the sine waves output by the sine wave amplification stage is turned over to frequency doubling half-wave signals, and the frequency doubling half-wave signals are converted into smooth direct-current voltages by being filtered and shaped by half-wave-to-direct-current voltage unit sets on the three detecting channels; the position of an oil pin is calculated by the electronic controller CPU of an engine according to the trigonometric function relation of AD conversion voltage values, and whether the impedance and phases of an exiting winding, a sine winding and a cosine winding of an external oil pin position sensor are matched or not is judged.

The invention relates to a preparation method of a nano particle reinforced ABS (acrylonitrile butadiene styrene) composite material and belongs to the technical field of ABS composite materials. The preparation method provided by the invention comprises the following steps of: firstly coating nano particles by utilizing a surfactant to form surface modified nano particles and then carrying out melt blending on the surface modified nano particles with ABS by utilizing a double screw extruder to obtain ABS composite material aggregates, wherein the surface modified nano particles are organic montmorillonite, nano titanium dioxide and nano hydrotalcite. When the preparation method provided by the invention is applied to modification of recycled ABS, mechanical property and ageing resistance of the recycled ABS can be obviously improved, the properties of the modified ABS can meet and even be higher than the standard requirements of plastic parts for a motorcycle and an electric vehicle, and the modified ABS can replace a new ABS material.

The invention discloses a microbial deodorant and a preparation method thereof. The microbial deodorant is specially used for removing putrid odors generated by NH3 and H2S and comprises lysinibacillus fusiformis J2 which can absorb and utilize H2S and a bacterial strain with nitrosation ability. The bacterial strain with nitrosation ability is one of pseudomonas YF1 or sinorhizobium fredii YS2 or a mixed bacterial strain of YF1 and YS2. The bacterial strain concentrations of the pseudomonas YF1, sinorhizobium fredii YS2 and lysinibacillus fusiformis J2 are above order of magnitudes of 1*10<8> / ml. The deodorant disclosed by the invention has the advantages that the microbial deodorant has the utilizing effect to NH3 and H2S which generate putrid odors, and meanwhile further can obstruct emission of putrid odors and has a remarkable deodorizing effect. The preparation method of the microbial deodorant is simple, flow in process flow, low in cost and convenient to use, and the microbial deodorant can be stored at normal temperature with a long period of validity.

The invention discloses a floor block with active carbons, which relates to a floor block and aims at solving the problems that the existing environmental building materials or decoration materials can not eliminate indoor harmful substances though the harmful substances in the decoration materials or the harmful substances which are released by the decoration materials meet standards. The floor block with active carbons adopts a first technical proposal that: through holes that are corresponding to grooves on the bottom surface of a base material layer are opened on a balancing layer; the active carbons are fixed in the grooves on the bottom surface of the base material layer and in the through holes of the balancing layer; the top surface of a venting interlayer is fixedly connected with the bottom surface of the balancing layer. The floor block with active carbons adopts a second technical proposal that: through holes are opened on a sound absorbing layer; the active carbons are fixed in the through holes; the top surface of the venting interlayer is fixedly connected with the bottom surface of the sound absorbing layer. The floor block with active carbons adopts a third technical proposal that: the active carbon layer is fixed on the bottom surface of the balancing layer; the venting interlayer is fixed on a lower side surface of the active carbon layer. The floor block of the invention has active carbons which can timely absorb, filter and eliminate the harmful gases in the rooms with such floor blocks, thereby improving the air quality.

The invention provides a method for removing heavy metal in marine animal homogenate. The method comprises the steps of firstly performing expansion culturing on yeast, preparing immobilized yeast gel balls, and preparing marine animal homogenate; performing acidolysis on the marine animal homogenate and separating the processed homogenate to acquire supernate and bottom sediment; and at last removing the heavy metal in the bottom sediment by using the yeast gel balls, and adsorbing the heavy metal in the supernate by using the free yeast. According to the method provided by the invention, aiming at the homogenate of marine organism, the steps of centrifugally separating the homogenate into the supernate part and the sediment part for processing, using yeast mud to remove the heavy metal in the supernate and removing the heavy metal in the sediment by using the yeast gel balls are ingeniously provided; and compared with the process of removing the heavy metal from the overall homogenate, the method provided can be significantly improved in heavy metal removal rate. Microorganism is immobilized, adsorptive property of the microorganism to the heavy metal can be achieved, and separation between the microorganism and foods can also be better achieved, so that the method is convenient for industrial utilization.

The invention relates to preparation and application methods of a Cu2O-AC photocatalyst and belongs to the fields of photocatalysis and resource comprehensive utilization technology. The preparation method comprises, with the existence of ultrasonic waves with power of 50-100 W and at room temperature, washing waste activated carbon in distilled water for 60-180 min and then drying the washed waste activated carbon; mixing the washed waste activated carbon with CuO powder at a weight ratio of 3-5:1-2, and then calcinating the mixture for 10-30 min at an inert gas pressure of 2-4 MPa, a microwave power of 200-800 W and a calcination temperature of 300-900 DEG C to prepare the Cu2O-AC photocatalyst. By taking the waste activated carbon as the raw material, the preparation method of the Cu2O-AC photocatalyst reduces discharge and pollution of waste to the environment and accordingly achieves comprehensive utilization of waste.

The invention provides a voice following method capable of feeding back loud-reading progress of a user in real time. The voice following method capable of feeding back the loud-reading progress of the user in real time includes the following steps: (1) inputting text to be tracked; (2) setting up tracking decoding networks according to the text and transmitting the tracking decoding networks and an acoustic model to a decoder; (3) collecting acoustic feature sequences in real time and transmitting the acoustic feature sequences to the decoder in real time; (4) judging the loud-reading progress of the user in real time by the decoder, and meanwhile detecting whether the user reads contents irrelevant to the text or not loudly by the decoder or not; (5) displaying the tracking progress in real time. The voice following method capable of feeding back the loud-reading progress of the user in real time solves the problem that normal tracking is not achieved because the user does not read in order abnormally, improves ability of anti-interference of environmental noise of the system, and ensures that the function of voice loud-reading tracking really achieves practical levels.

The invention discloses an energy-saving purification device of industrial waste gas. The energy-saving purification device comprises a base, wherein support legs and a water storage tank are fixedlyconnected to the bottom of the base, a purifying box is fixedly connected with the top of the base, and the left side of the purifying box communicates with a first filter box; an air inlet pipe communicates with the left side of the top of the first filter box, and a first filter net is disposed in the inner cavity of the first filter box. Through arrangement and cooperative use of the base, thepurifying box, an activated carbon adsorption net, an ultrafiltration membrane filter net, a second filter box, an air outlet pipe, an exhaust fan, a first water pump, a water pipe, a nozzle, the airinlet pipe, the first filter box, the first filter net, a water suction pipe, a second water pump, a connecting pipe, the water storage tank, support legs, a water injection pipe, pipe covers, the second filter net and a water outlet pipe, the problem that an existing industrial waste gas purifying device is not environmentally friendly and energy-saving is solved; the energy-saving purification device of the industrial waste gas has the advantages of environmental protection and energy conservation, and is worth promoting.

The invention belongs to the field of absorbing materials of a microwave engineering technology, and concretely relates to a bidirectional meta-material absorber that can absorb electromagnetic waves at a specified frequency range in hidden, electromagnetic shielding and detecting conditions. The bidirectional meta-material absorber is of a unit periodic structure. The unit structure includes a middle-layer metal film, loss dielectric layers on two sides, and metal square rings etched on the two loss dielectric layers. The bidirectional meta-material absorber is of a symmetrical structure from top to bottom relative to the metal film in the middle, and resonators are formed on the upper side and a lower side of the structure respectively, so effects of absorbing electromagnetic waves in two directions can be achieved. Moreover, the bidirectional meta-material absorber has a wide incidence angle, the wave absorbing rate of the absorber at a frequency point still keeps more than 92% when the incidence angle of the electromagnetic waves is increased to 50 degrees, and the frequency corresponding to an absorption peak does not shift along with increases of the incidence angle.

The invention relates to a multifunctional household water purifier, which comprises a shell, wherein a filter screen is respectively arranged on the top and at the bottom of the inside of the shell; various filter materials are filled between the upper filter screen and the lower filter screen; a water inlet pipe is arranged on the top of the shell, and a water outlet pipe is arranged at the bottom of the shell; the outer end of the water outlet pipe is connected with a stop valve; the top end of the water inlet pipe is connected with one water outlet of a triple switch valve; a back flushing water inlet pipe is connected with the other water outlet of the triple switch valve; the tail end of the back flushing water inlet pipe is communicated with the water outlet pipe on the lower part of the water purifier; a water inlet of the triple switch valve is directly connected to a water supply pipe; a blow-off pipe is also arranged on the water inlet pipe at the top end of the shell of the water purifier; and a stop valve is arranged on the blow-off pipe. The multifunctional household water purifier can select pertinent filter materials according to the local water quality conditions, can effectively filter out impurities and pollutants in inlet water, can always maintain the high-efficiency filter effect of a filter as long as a back flushing program is often performed for the multifunctional household water purifier is provided with a back flushing device, and is suitable to be used by residents.

The invention provides a filling powder used for plywood, which uses a technical scheme that: 45%-55% of heavy calcium carbonate, 30%-35% of pregelatinized starch, 3%-5% of cereal element powder and 5%-10% of wood powder are placed in a stirrer according to proportion, stirred and mixed to produce the filling powder. The filling powder used for plywood is a green environmental protection functional material with no toxicity, no flavour, fire resistance, deterioration resistance and mildew resistance. After mixing with a resin adhesive, the filling powder has the advantages of good cohesiveness, suspensibility, dispersibility, fluidity, adsorptivity and thixotropy. The solid content of the filling powder is higher than that of industrial flour, the price of the filling powder is lower than that of the industrial flour. The filling powder used for plywood is a mixture which has the advantages of simple production process, less investment equipment, convenient operation and large production capacity.

The invention discloses a method for removing high-concentration thallium-containing industrial wastewater by manganese ferrite. The method comprises the steps as follows: 1, adding an oxidizing agentto high-concentration thallium-containing wastewater, performing stirring and oxidizing part of univalent thallium in water into trivalent thallium; 2, adding nanoscale manganese ferrite or a nanoscale manganese ferrite adsorbent coated with humic acid to the wastewater obtained in the step 1 to adsorb trivalent thallium and univalent thallium in water; 3, applying a magnetic field around the wastewater obtained in the step 2, taking a supernatant as obtained treated water, and performing solid-liquid separation on the wastewater; 4, removing the magnetic field after solid-liquid separation in the step 3, taking out a nanoscale manganese ferrite adsorbent solid, and performing desorption to obtain an enriched recovered thallium solution and a regenerated nanoscale manganese ferrite adsorbent. The method has the advantages as follows: nanoscale manganese ferrite is convenient to produce and low in preparation cost and can be repeatedly recycled after being prepared once, and heavy metal thallium can be recovered efficiently.

The invention discloses a multifunctional steel-slag ecological environment-friendly water-permeable brick and a preparation method thereof. The multifunctional steel-slag ecological environment-friendly water-permeable brick is prepared from the following raw materials in parts by weight: a basal layer which is prepared from 70 to 90 parts of steel-slag aggregate, 8 to 20 parts of cement or mineral powder and 5 to 10 parts of water; a surface layer which is prepared from 75 to 85 parts of steel-slag sand, 10 to 20 parts of cement, 5 to 10 parts of water and 0 to 2 parts of toner. Through steel-slag pretreatment, batching, mixing, molding and maintenance, the multifunctional steel-slag ecological environment-friendly water-permeable brick is obtained. As having a high steel-slag blending amount, favorable water permeability and a pressure bearing function, the obtained steel-slag water-permeable brick can form a partially alkaline environment and a microscopic pore passage structure on the surface and in the interior of the water-permeable brick, furthermore achieving the effects of adsorbing heavy metal and purifying water. The steel-slag blending amount is high; the steel-slag utilization rate is high; the production cost is low; the environment protection and the resource saving are facilitated; a production method is simple, is easy to implement, is good in universality and is convenient to popularize.