526results about How to "Solve the reuse problem" patented technology

The invention, belonging to the technical field of universal plastics modification, discloses a polypropylene composition and a preparation method thereof. The polypropylene composition disclosed herein comprises the following ingredients: 38.5-95 weight parts of polypropylene, 5-25 weight parts of toughening agent, 0-35 weight parts of inorganic filler, 0-0.5 weight parts of lubricant, 0-0.5 weight parts of light stabilizer, and 0-0.5 weight parts of antioxidant. The preparation method disclosed herein comprises the following steps: adding 38.5-95 weight parts of polypropylene, 5-25 weight parts of toughening agent, 0-35 weight parts of pretreated inorganic filler, 0-0.5 weight parts of lubricant, 0-0.5 weight parts of light stabilizer, and 0-0.5 weight parts of antioxidant in a high mixing machine to mix for 5-10 min; adding the mixture in a double-screw extruder from the charging hole, and granulating. According to the invention, under the condition of keeping excellent comprehensive performances, the polypropylene composition disclosed herein has low production cost, high cost performance, and strong competitive power on the market, and can be widely applied in the material fields of auto-inner ornaments, door sheets, bumpers, liners and shells of household appliances, etc.

The invention belongs to the technical field of engineering plastic modification, and discloses a polyamide composition and a preparation method thereof. The polyamide composition comprises the following components by weight: 27-95 parts of polyamide, 5-35 parts of a toughening agent, 0-35 parts of an inorganic filler, 0-1 part of a coupling agent, 0-1 part of a lubricant, and 0-1 part of an antioxidant. The polyamide composition prepared by the method provided by the invention has a very low product cost and high price performance while keeping good comprehensive performance, and consumes a large amount of waste polyamide and rubber waste to solve the problem of waste reutilization; therefore, the method is as well a resource reuse engineering with both economic and environmental benefits, and promotes the development of circular economy. The product has strong competitiveness in the market, and can be widely used in the fields of machinery, electronics, automobile, electrical appliances and consumer goods.

The invention provides a matrix material and restoration method for ecological restoration of a gangue dump of a mining area. The matrix material consists of two parts, i.e., a seed germination layer and a root inducing layer and is mainly prepared from loam, acidified coal gangue, inorganic nonmetallic minerals, plant fibers, a water retention agent, an agglomerating agent, a disinfectant, a compound fertilizer, a seed mixture and the like. The matrix material has the characteristics of water retention, fertilizer retention, good stability, erosion resistance, easiness in plant establishment and the like; and by using wastes such as the coal gangue as main matrix materials, the consumption of imported soil can be effectively lowered, the soil environment of abandoned mines is improved, the environmental pollution is reduced, and the ecological restoration cost is reduced.

A method for preparing modified maize straw hydrothermal charcoal by adopting KOH comprises the following steps: smashing the maize straw into powder; taking proper amount of maize straw powder, mixing with a distilled water,and conducting hydrothermal reaction in a reaction kettle so as to prepare the maize straw hydrothermal charcoal; mixing the obtained hydrothermal charcoal and a KOH solution, stirring for a period of time, and then conducting filtering, water washing and stoving so as to obtain the modified maize straw hydrothermal charcoal. The method is simple, and facilitates industrialized production; comparing the effect of the prepared modified hydrothermal charcoal with that of the conventional charcoal or a conventional similar charcoal adsorbent, the adsorptivity on heavy metal is greatly improved, and the stability is considerable.

The information provides a novel internet secure transaction system and a method thereof. A client computer system and an e-currency system running on the client computer system serve as transfer systems and do not participate in interaction with key information; a safe and logic communication link is built between a service terminal and information safety equipment; and key information does not appear in the client computer system and the e-currency system in the clear form so that a user key can not be intercepted and utilized repeatedly by an attacker. In order to achieve the purpose of building the safe and logic communication link, the dynamic key technology is used in the invention, that is, in the process of internet transaction, keys used each time are different. Each time the internet transaction is conducted, the bank service terminal generates two new symmetrical keys which are encrypted and then transmitted to the information safety equipment. The information safety equipment decrypts the encrypted keys to obtain the key so as to conduct the encryption communication with the service terminal. Even if the key is intercepted by the attacker, the key can not be used next time, because the keys used each time are different.

The invention provides an oxidation resisting polypeptide and a preparation method thereof. The method takes sharkskin collagen as the raw material. By means of enzymolysis of acidic protease, separation and purification, a specific oxidation resisting polypeptide can be obtained, with a molecular weight of 902Da and a complete amino acid sequence as Gly-Thr-Met-Gly-Ala-Val-Gly-Pro-Arg-Gly. The oxidation resisting polypeptide of the invention eliminates the defects of natural antioxidants and relieves the public from their anxiety about synthetic antioxidant, thus establishing the theoretical foundation for developing oxidation resisting polypeptide based on food sources and exploring the wide application of the oxidation resisting polypeptide in food and medical science.

The invention relates to an active carbon material, and particularly relates to a method for preparing food hygiene-level active carbon by use of biological waste resource bagasse. The method comprises the steps of collecting and cleaning the residual bagasse after sugar production; sufficiently fermenting at 10-50 DEG C, drying, grinding and sieving; then performing the operation treatment such as soaking in an active agent solution, charring, activation and the like on the pretreated bagasse; washing, drying and grinding to obtain a high-performance active carbon product which can be applied to decoloration, refining and impurity removal of the sugar industry and the fields of foods and medicines such as medicinal crude drugs and the like. According to the method provided by the invention, by adopting the waste bagasse as a raw material, the comprehensive utilization of resources and environmental protection are facilitated; moreover, the price is low, the product quality is high, and the economic and social benefits are good.

The invention relates to cultivation soil, in particular to seedling-cultivating substrate soil for micro agriculture. The seedling-cultivating substrate soil is formed by mixing a substrate with rural soil or clay and comprises the following components in weight percent: 25% to 45% of the substrate and 55% to 75% of the rural soil or clay; the substrate comprises 60% to 80% of organic matters in weight percent and includes 1% to 3% of nitrogen, 1.5% to 3.5% phosphorus, 2% to 4% of potassium, and 0.02% to 0.8% of trace elements including magnesium, calcium, iron, manganese and boron; the pH value of the substrate is 6.5 to 6.8; the organic matters comprise 1 to 4 parts of bamboo vinegar liquid, 1 to 3 parts of starch-acrylic acid graft copolymer, 15 to 40 parts of a straw decomposition agent, 15 to 40 parts of fermented human and animal excreta, 10 to 18 parts of edible fungus residue, 3 to 6 parts of waste bamboo, 2 to 5 parts of plant-charcoal powder, 5 to 10 parts of silt slag, 4 to 6 parts of bone meal and 4 to 9 parts of soybean meal. According to the invention, specific components and proportion are adopted to prepare the organic matters, and the organic matters are combined with inorganic matters to form the acidulous substrate, so that the seedling-cultivating substrate soil is high in nutritional ingredient and appropriate in proportion of trace elements, has an excellent odor removing effect, and avoids undesirable odors produced during planting of vegetables and other plants for urban families.

The invention relates to a starch based biomass functional adhesive and a preparation method thereof, and is particularly applied to the field of papermaking. The biomass functional adhesive comprises the following components: 30-45% of a biomass main raw material, 5.5-22.5% of a plasticizer, 0.55-3.5% of a lubricant, 0.55-5.5% of a crosslinking agent, 0.01-5.5% of a modifier, 0.55-5.5% of an auxiliary film-forming agent, 0.1-0.55% of a preservative, 0.01-5.5% of a pH regulator and the balance of water. The preparation method is as follows: adding the biomass main raw material, the modifier and the water into a reaction kettle, heating to 60 to 100 DEG C for reaction; performing digestive treatment; adding the lubricant, the plasticizer and the crosslinking agent for reaction at 60 to 90 DEG C, then adding the preservative, adding the pH regulator and the auxiliary film-forming agent, mixing, discharging and filtering to obtain the biomass functional adhesive. The biomass functional adhesive has low cost and excellent adhesive performance.

The invention provides a ceramic water permeable brick and a method for manufacturing the same. The ceramic water permeable brick comprises the following components in weight percentage: 75 to 85 percent of waste ceramic powder, 2 to 5 percent of waste glass powder, 10 to 20 percent of low-temperature clay, 2 to 5 percent of limestone, 2 to 5 percent of dextrin, 0 to 6 percent of albite and 2 to 5 percent of water. The preparation process comprises the following steps: (1) the waste ceramics, the waste glass, the low-temperature clay and the limestone are crushed and sieved; (2) material mixing; (3) the dextrin is added to water and heated; (4) waste ceramic grains are mixed with dextrin water; (5) other powder materials are added and stirred; (6) the mixing pulp is added into a die and subjected to press forming by a pressing machine; (7) drying; (8) the mixing pulp after drying is burned at a temperature of between 1,100 and 1,200 DEG C for 5 to 6 hours; and (9) checking. The application of the water permeable brick has the advantages of having short burning time, simple process method, lower production cost, good water permeable performance, high strength and high utilization rate of waste, and solving the problem of utilizing waste ceramics, protecting the environment and saving natural resources, and so on; and the ceramic water permeable brick can be widely used to pave roads in public places such as squares, parks, sidewalks, parking lots.

The invention discloses a hair model modeling method. Firstly, a simplex hair style of a hair style model is formed by a hair style constrained domain, complex hairline transformation is controlled by a hierarchical constrained domain queue, and therefore generation of diversified hair styles is supported. On that basis, a mapping relation of the hair style constrained domain is built among any fictional character models, and therefore a rapid and reusable modeling of a fictional character hair style can be achieved. According to the hair model modeling method, general applicability of the hair style restrained domain is expanded, due to combination of methods of hair style restrained domain and a hair style modeling based on a sample, diversity degree of hair styles generated through a hair style constraint method can be significantly improved, rapid reusing of built hair style constraints on any fictional character models is supported, and therefore the rapid and reusable modeling of fictional character hairs is achieved.

The invention discloses an emulsifying liquid wastewater membrane treatment process. The process comprises the steps of pretreatment, metal tube type membrane ultrafiltration and organic membrane pretreatment. The process has the advantages that the problem that the current emulsifying liquid wastewater treatment has high cost, complex operation, low treatment efficiency and poor comprehensive recycling effect can be effectively solved so that the oil content of the treated emulsifying liquid wastewater is 10mg / l or less, the suspended substance (SS) content is 30mg / l or less and the chemical oxygen demand (CODcr) is 100mg / l or less, the problem that the emulsifying liquid wastewater is treated and discharged according to the related standard or is reused is fully solved; and the comprehensive utilization of the emulsifying oil is realized, the treatment process is efficiency and energy-saving, is easy to operate and use, the environmental pollution is reduced, the cost is low, and the process has great economic and social benefits.

The invention discloses a coke powder-based cathode material of a lithium ion power battery and a preparation method thereof. The cathode material has a D50 of 10-30 [mu]m, a minimum granularity of 5 [mu]m, a maximum granularity of 30 [mu]m, and a tap density of 1.1-1.5 g / cm<3>. The cathode material has a core-shell structure, wherein a core is graphitized coke powder, and a shell is composed of coal pitch pyrolytic carbon and metal particles. The cathode material contains 95.00-99.00 % of solid carbon and 1-5 % of metal or metal oxide particles by mass percent. The preparation method comprises crushing, grading and purifying the coke powder, cladding coal pitch on the coke powder particles, graphitizing under a high temperature, attaching metal or metal oxide on the particles, etc. The cathode material is excellent in rate performance, good in high-temperature and low-temperature performances, low in manufacture cost and suitable for large-scale industrialization.

The invention provides a method for filling a polyurethane sole with waste rubber. The method comprises the following steps that A components, B components and rubber particles are mixed to be poured into a sole mold to be in reaction forming, demolding is carried out, and curing is maintained in a 60-70 DEG C drying oven for 22-24 hours to obtain the polyurethane sole filled with the waste rubber particles; the A components comprise, by weight, 100 parts of low polymer polyhydric alcohols, 1.2-2.0 parts of catalytic agents, 0.3-0.6 part of foaming agents, 0.5-1.2 parts of foam stabilizer silicone oil, and 7.0-15.0 parts of chain extender; and the B components comprise, by weight, 30-90 parts of the low polymer polyhydric alcohols, and 100 parts of diisocyanate. According to the method, the obtained polyurethane sole is uniform in foam holes, smooth in surface, and higher than a common polyurethane sole in tensile strength, abrasion resistance and tearing strength, the problem of reuse of rubber waste is resolved, and the technological process is simple and efficient.

The invention relates to a water treatment agent prepared by utilizing blast furnace slag, and the agent is obtained by treating blast furnace slag by alkaline solution. The blast furnace slag comprises: 25-30% of SiO2, 40-45% of CaO, 15-20% of Al2O3, 10-20% of MgO, 1.08-1.5 of (CaO+MgO) / (Al2O3+SiO2). The alkaline solution with pH of more than 11 are mixed with the blast furnace slag as per 1 : 1-5 of the solid-to-liquid ratio, dried for 24-48h at 50-120 DEG C after filtration, and the outcome is taken out, smashed and passes through a standard filter of 6-80 m. The improved blast furnace slag is used as the water treatment agent and can treat the sewage with high efficiency and large amount, especially for the sewage containing the ions such as Ni(II), Pb (II), Cu(II), Zn(II), Mn(II), Fe(III), Al(III), Cr(III), etc.

The invention discloses a method for preparing high-purity methyl isobutyl ketone from an industrial by-product acetone waste liquid. According to the method, industrial byproduct acetone waste liquid, which contains more impurities and is difficult to separate, and hydrogen directly pass through a fixed bed tubular reactor filled with a heterogeneous catalyst, thereby converting acetone and difficultly separated impurities into MIBK and substances which are easily separated from the product; the reaction products are purified by distillation to obtain high-purity methyl isobutyl ketone. By virtue of the technology disclosed by the invention, a problem of a complex separation of acetone from impurities is solved, the cost for separating raw materials and the acetone circulation cost are greatly reduced, and the economical benefits of the device are greatly improved by converting the by-product acetone waste liquid into an MIBK product with high added value.

The invention discloses a medical mask recycling machine which can crush and sterilize recycled masks, carry out winnowing, distinguishing and collecting on the crushed masks through a draught fan andcan prevent the recycled masks from being reutilized by lawless persons. The medical mask recycling machine is characterized in that a device body is composed of a transverse shell and a vertical shell; the transverse shell is arranged on the top of the vertical shell; the position, corresponding to the vertical shell, of the transverse shell is provided with a communicating slot; the transverseshell communicates with the vertical shell through the communicating slot; one side of the transverse shell is provided with a charging slot; two sets of conveying rolls are arranged in the transverseshell; one set of conveying rolls is composed of at least five conveying rolls transversely and equidistantly distributed; the two sets of conveying rolls are located on the upper and lower sides ofthe charging slot correspondingly; the two ends of a shaft of each conveying roll are connected with the transverse shell through bearings; the shaft of each conveying roll is sleeved with a chain wheel I; the chain wheels I on one set of conveying rolls are connected through a chain I; and the gap between the two sets of conveying rolls communicates with the charging slot correspondingly.

A method for preparing modified wheat straw hydrothermal charcoal by adopting KOH comprises the following steps: smashing the wheat straw into powder; taking proper amount of wheat straw powder, mixing with a distilled water, and conducting hydrothermal reaction in a reaction kettle so as to prepare the wheat straw hydrothermal charcoal; mixing the obtained hydrothermal charcoal and a KOH solution, stirring for a period of time, and then conducting filtering, water washing and stoving so as to obtain the modified wheat straw hydrothermal charcoal. The method is simple, and facilitates industrialized production; comparing the effect of the prepared modified hydrothermal charcoal with that of the conventional charcoal or a conventional similar charcoal adsorbent, the adsorptivity on heavy metal is greatly improved, and the stability is considerable.

The invention discloses a method for recovering valuable metal from red soil nickel minerals comprehensively. At present, because the red soil nickel minerals are treated by a wet method, and water contained in mineral aggregates which enter a leaching system is not controlled effectively, the water content of the mineral aggregates which enter the system is about 70 percent, the concentration ofnickel ions in a leachate of the system in a nickel precipitation process cannot be enriched and is low due to large total amount of the water, and the volume of water which is needed to be treated in the system is large and the treatment cost is high. The method comprises a mineral aggregate preparation section, a leaching extraction deironing section, a chromium recovery section, a nickel precipitation section and a magnesium recovery section which are performed sequentially, and is characterized in that leaching reaction is performed under a sulfuric acid system, and the total quantity of waste water and waste residues of the system is reduced by a series of measures to improve the recovery rate of the valuable metal; and a large number of production auxiliary materials are used in theproduction process, and are recycled, so that the production cost is reduced substantially.

The invention provides an earphone and an implementation method thereof. The earphone comprises: a USB type C interface used for receiving a digital signal comprising a digital audio signal and transmitted by an electronic device; a micro control unit connected with the USB type C interface and used for controlling the USB type C interface to receive the digital signal; a digital / analog conversion chip connected with the micro control unit and used for converting the digital audio signal into an analog audio signal; and a loudspeaker monomer connected with the digital / analog conversion chip and used for playing audio contents for a user according to the analog audio signal. According to the earphone provided by the invention, the USB type C interface on the electronic product can be used for supplying power to the earphone and transmitting audio to the earphone, and the earphone can be used for transmitting a control command to the electronic product.

The invention belongs to the technical field of wastewater ammonia removal, and particularly relates to a technical method for efficient membrane ammonia removal treatment on industrial high-ammonia containing wastewater by applying an integration membrane. According to the integration membrane ammonia removal method, a vacuum membrane ammonia removal and membrane absorption ammonia removal combined two-step ammonia removal method is used for realizing efficiently low-consumption ammonia removal of wastewater. The technical method comprises the steps of: firstly removing about 80% of ammonia nitrogen in the wastewater by using a vacuum membrane ammonia removal method, and then removing about 99% of remained ammonia nitrogen in the wastewater by adopting a membrane absorption ammonia removal method, thus the total ammonia removal efficiency exceeds 99%. Ammonia removed by the vacuum membrane ammonia removal method is used for preparing about 15% ammonia water by adopting an absorption method and is recycled for production. An acidic ammonia containing waste absorption liquid generated by adopting the membrane absorption ammonia removal method returns to a vacuum membrane ammonia removal unit and is mixed with a raw material, and then vacuum ammonia removal is carried out. The method has the advantages of having high ammonia nitrogen removal rate, realizing resource utilization, solving the problem of recycling the acidic ammonium containing waste liquid existing in a membrane absorption ammonia removal method, and avoiding secondary pollution.

The invention discloses a method for culturing lucid ganoderma by using a culture medium containing non-medicinal parts of Chinese medicinal materials. The nutritional component of the lucid ganoderma culture medium contains 10-70 percent of non-medicinal part components of Chinese medicinal materials based on the total weight. The method comprises the following steps of: uniform mixing of the non-medicinal parts of the Chinese medicinal materials fully soaked into water and other components of the culture medium, sterilization, inoculation, and breeding under a temperature condition adapted to the growth habit of the lucid ganoderma to obtain a lucid ganoderma fruit body product, wherein the ratio of the total C to N of the culture medium is (50-80): 1, and the pH value is 5 to 8. By using the method, the reutilization problem of the non-medicinal parts of conventional Chinese medicinal material wastes can be solved, the wastes are changed into valuable, particularly the problem of culture medium shortage in conventional lucid ganoderma culture can also be solved, and the yield and the fruit body quality of the lucid ganoderma can be improved to a certain extent without changing the conventional culture, production operation modes and conditions; and the method has rather high social significance and commercial value.

The invention belongs to the field of production and preparation of inorganic functional materials, and particularly relates to a process for preparing single-phase sodalite from fly ash, which comprises the following steps: pretreating fly ash by an alkaline fusion method; proportionally adding the activated fly ash, aluminum hydroxide and sodium hydroxide solution into a polytetrafluoroethyleneinner container, evenly mixing, and carrying out hydrothermal crystallization in a sealed constant-temperature drying oven; and finally, filtering the product, washing until the product becomes neutral, and drying to obtain the single-phase sodalite material. The invention successfully synthesizes the low-cost single-phase sodalite zeolitization material by using solid waste-fly ash as the raw material for production. The process has the advantages of low cost, abundant sources of raw material, controllable product performance, no secondary pollution and the like, is simple and easy to operate, and thus, has great industrial application potential.

The invention discloses a method for realizing a downward control channel in a wireless communication system, which comprises the following steps: a base station determines a downward subframe unit containing a control channel and sends the position information of the control channel in a unit frame in superframe control information, wherein the downward subframe unit comprises a basic resource block; the basic resource block consists of two-dimensional resources of time domain and frequency; and the base station sends a control message and data on the control channel and the basic resource block occupied by data in a frequency-division multiplexing mode. The invention provides a novel control channel design, solves the multiplexing problem of the control channel and the data in a conventional broadband wireless access system and can promote the power of the control channel as required, guarantee the reliable transmission of the control channel, maintain the fixing of the basic resource block in the subframe unit and further reduce the expense of resource distribution.

The invention relates to a preparation and application of unsaturated pectic oligosaccharide and a compound biological preservative combined with the unsaturated pectic oligosaccharides, which is characterized in that: pectin is extracted from pericarps or fruit residues, pectate lyase produced by the fermentation of aspergillus niger-wz003 is added into the pectin, and then the unsaturated pectic oligosaccharide is obtained by centrifugal separation, monosaccharide removal by yeast, decoloration by active carbon, polyether sulfone membrane and membrane separation of regenerated cellulose, and the unsaturated pectic oligosaccharide can be obtained by a further drying step. The preparation method of unsaturated pectic oligosaccharide and a compound biological preservative combined with the unsaturated pectic oligosaccharides has the advantages that: self-made pectate lyase is utilized, so the raw materials are easy to obtain and the cost is low; meanwhile, the pectic oligosaccharide and the compound biological preservative has the advantages of innocuity, high efficiency, broad spectrum and wide application range and can reduce the addition of chemical preservatives.

A method for preparing modified wood chip hydrothermal charcoal by adopting KOH comprises the following steps: smashing wood chips into powder; taking proper amount of wood chip powder, mixing with distilled water, and conducting hydrothermal reaction in a reaction kettle so as to prepare the hydrothermal charcoal; mixing the obtained hydrothermal charcoal and a KOH solution, stirring for a period of time, and then conducting filtering, water washing and stoving so as to obtain the modified wood chip hydrothermal charcoal. The method is simple, and facilitates industrialized production; comparing the effect of the prepared modified hydrothermal charcoal with that of the conventional charcoal or a conventional similar charcoal adsorbent, the adsorptivity on heavy metal is greatly improved, and the stability is considerable.

The invention discloses a drug fertilizer for tomato production based on concentrated liquid of biogas fermentation slurry, which is characterized by consisting of the following compositions in weight percentages: 95 to 98 percent of the concentrated liquid of the biogas fermentation slurry, 25 percent of prochloraz, 0.001 to 0.003 percent of missible oil, 80 percent of mancozeb, 0.01 to 0.03 percent of wettable powder, 0.8 to 1.2 percent of ethylene glycol, 0.8 and 1.2 percent of kerosene, and the balancing being auxiliary materials. A method for preparing the concentrated liquid of the biogas fermentation slurry is characterized by comprising the following steps: taking the biogas fermentation slurry taken from a biogas generating pit or a reactor with normal fermentation and gas generation, making the biogas fermentation slurry pass through a steel sieve the aperture of which is 20 millimeters, and sedimentating the effluent to remove larger suspended substances; filtering the effluent through a sand filter and an ultrafiltration membrane sequentially to retain substances of which the molecular weight is larger than 100, 000 Da; causing the liquid penetrating the ultrafiltration membrane to enter a nanofiltration tank from the top down; arranging a nanofiltration membrane on the lower part of the nanofiltration tank to only allow the substances of which the molecular weight is less than 200 Da to pass through; and when the main fertilizer content index is 10 times or more than 10 times higher than that of the original biogas fermentation slurry, qualifying the concentration. The drug fertilizer integrates the functions of sterilization, disease prevention and fertilizing, reduces the labor intensity, improves the labor efficiency, and effectively reduces the agricultural expenditure for farmers; besides, the drug fertilizer solves the problem of recycling the biogas fermentation slurry produced in the process of utilizing agricultural waste resources to .

The invention discloses a device for the treatment and reclamation of rain water based on water quality, comprising a water inlet pipe (1), a recycle-water pipe (32) and a rain water collecting chamber (31). The invention is provided with a rain water treatment device which is used to treat polluted rain water; the water inlet pipe(1) is connected with the rain water treatment device and the rain water collecting chamber(31) respectively; the polluted rain water enters the rain water treatment device for treatment by the water inlet pipe(1), and the treated rain water meets the requirement of the recycle-water on water quality, then the rain water enters the rain water collecting chamber(31), and the rain water meeting the water quality of the recycle-water directly enters the rain water collecting chamber(31); and the rain water collected by the rain water collecting chamber(31) is recycled by the recycle-water pipe(32). The device can treat and utilize the rain water based on different pollution degrees of the rain water, thereby resolving the recycling problem of rain water in housing estates, architectural complexes and areas; and the device not only reduces the pollution load of rain water in cities, but also improves the utilization ratio of rain water resource.

The invention discloses a multifunctional blast protecting object which comprises a body, wherein the body is of a rectangular dual-layer blocky structure; a reinforcing rib is arranged inside an interlayer of the rectangular dual-layer blocky structure; and a plurality of small hanging holes are formed in the upper surface and the lower surface of the rectangular dual-layer blocky structure and penetrate through the body. The multifunctional blast protecting object disclosed by the invention has the beneficial effects that the multifunctional blast protecting object is mainly made of dual-layer flexible material with certain height and certain strength; and more flying rocks or impact energy generated by collapsing buildings can be absorbed by means of plastic deformation of the material after the material is impacted, so that the damage to the material is reduced and the factors of blasting flying rocks and vibration hazard are reduced. The multifunctional blast protecting object can be used for multiple times and can be used for solving the problem of recycling of rubber products such as waste vehicle tire; if the multifunctional blast protecting object is applied to the field of blast protection, the blast safety can be improved and higher economic and social benefits can be obtained; and the multifunctional blast protecting object is wider in application prospect.

The invention discloses a preparation method of molybdenum carbide microspheres. The method comprises the following steps of: (1) adding strongly alkaline anion exchange resin to a molybdate solution, carrying out stirring reaction at a room temperature, obtaining a molybdenum ion-resin compound through washing and suction filtration, and drying the molybdenum ion-resin compound to obtain ion exchange resin microspheres containing a molybdenum element; and (2) putting the ion exchange resin microspheres containing the molybdenum element obtained in the step (2) into a ceramic crucible, roasting the microspheres at 700-1,000 DEG C in the presence of an inert gas for 1-4 hours, and naturally cooling the product to a room temperature to obtain the molybdenum carbide microspheres. The invention further discloses application of the molybdenum carbide microspheres in hydrogen production through electrolysis of water. The preparation conditions are low in demands; the raw materials are cheap and available; the prepared molybdenum carbide microspheres have electrochemical activity of catalytic low overpotential and good stability.