734results about How to "Realize environmental protection" patented technology

The invention relates to a metal powder preparation device and method therefor. The device comprises an atomization furnace, a heater, a cooler, an atomization chamber, an atomizer, a pneumatic classifier, a middle bin, a sieving funnel, a screening machine, a deduster, a balance tank, a shell-and-tube heat exchanger, a vacuum obtaining device, a control system, an infusion tube, a conduit, a pipeline, a gas channel, a pneumatic butterfly valve, an electromagnetic valve and the like. The method comprises atmosphere preparation, metal smelting, infusion, centrifugal atomizing, pneumatic classification, mechanical screening, gas purification, cooling and the like, the metal is smelted and treated so as to be poured onto the atomizer for centrifugal atomization to form powder, the powder is classified by the pneumatic classifier, after classification, rough powder is screened by the mechanical screening so as to obtain the finished powder, fine powder is sent into the deduster by airflow for purification, the purified gas is driven by a high pressure centrifugal fan so as to be speeded up to be atomized and classified again after being subjected to heat exchange through the shell-and-tube heat exchanger. The device can be used for continuous production of spherical powder below -320 meshes, and the oxygen content is less than or equal to 80ppm.

The invention provides a method for preparing synthetic leather and the synthetic leather prepared by the method. The method comprises the following steps: (1) coating slurry containing surface waterborne polyurethane resin on the surface of release paper, and drying to form a finishing coat; (2) mixing and foaming the slurry containing the foaming waterborne polyurethane resin with air by using a foaming machine, and coating the foamed slurry on the surface of the finishing layer, and drying to form a medium foaming layer; and (3) adhering the surface of the foaming layer and a basic fabric by using an adhesive containing waterborne polyurethane resin, and drying. The method uses the waterborne resin foaming layer to replace the Base leather manufacturing process, avoids using toxic and harmful organic solvents, such as dimetbyl formamide (DMF), toluene and the like, solves the pollution problem in the synthetic leather industry, and realizes clean manufacture of the synthetic leather.

The invention provides a geopolymer gel material for rush repairs and rush constructions, which is prepared by adding water to 13-17 percent by weight of exciting agent and 82-87 percent by weight of slag containing aluminosilicate. The slag comprises one or the combination of more of blast furnace slag, steel slag, coal ash and coal gangue, and the exciting agent comprises the following components in percentage by weight: 35-75 percent of SiO2, 0-55 percent of Na2O, 0-65 percent of K2O, 0-1 percent of CaO and 0-1 percent of SO3. The geopolymer gel material which has the characteristic of quick setting and hardening is prepared by using the industrial waste slag as a main raw material and matching the exciting agent, and the geopolymer gel material has excellent mechanical property and controllable setting time and can replace gel materials such as fast setting and hardening cement, and the like in the processes of rush repairs and rush constructions. The industrial solid wastes such as the blast furnace slag, the steel slag, the coal ash, the coal gangue, and the like containing the aluminosilicate series are used as main raw materials, metakaolin is not added and the raw materials do not need to be calcined, thus the invention has low energy consumption, less pollution, simple process, low cost, environmental protection and energy saving.

The invention relates to a copper alloy material and a processing technology thereof, in particular to a high-strength nickel-chromium-silicon-copper alloy material and a processing technology thereof. The alloy material has low toxicity and low cost. The alloy material comprises the following components by mass: 2.1-2.9% of Ni, 0.4-0.7% of Cr, 0.3-0.7% of Si, not more than 0.3% of total impurities and the balance of Cu. The processing technology comprises the steps of casting, press processing, high-temperature solution hardening and heat treatment, cold press processing, aging heat treatment and mechanical processing.

The invention relates to a method for calculating a small watershed environmental capacity under the support of GIS (Geographic Information System) technology. The problem of imprecise calculation result which is caused by the influence of a non-point source or the difference of river inlet quantity of the non-point source of each control unit is solved. The method comprises the following steps of determining the watershed range of the control unit; using a hydrologic analysis module in an ArcGIS software and the method of combining practical river data positioned and corrected by GPS (Global Position System) to determine the land area catchment range of the control unit so as to obtain the control unit for land and water response; evaluating the water quality status; using statistic data of a pollution source and combining the practical study result of the pollution source to summarize the pollutant river inlet quantity of the pollutant of a point source and the non-point source according to the control units; reversely calculating the flow of each control cross section according to water balance; and calibrating, verifying and using water quality model parameters, and deducting the non-point source pollutant inlet of each control unit to obtain the available water environmental capacity. The river inlet quantities are calculated by considering the emission difference of non-point source pollutants in each control unit by using the GIS technology, and the watershed available environmental capacity is determined.

The invention discloses a method for matching a dynamic system of an engineering vehicle, which uses an electrically-controlled engine, wherein the engine demarcates engine power and engine torque under different working conditions. The method comprises the steps: obtaining current working condition of the engineering vehicle, including current load state; according to the current working condition, switching output torque of the engine to demarcated torque of the engine corresponding to the current working condition so that the engine operates on an external characteristic curve of the engine corresponding to the current working condition. The invention can provide corresponding power output under different load states so as to realize the effects of energy conservation and environmental protection. The invention also discloses a matching system for the dynamic system of the engineering vehicle.

The invention discloses an induction and vehicle finding system for a smart park parking lot. The empty parking space situation of the parking lot is judged through the video intelligent analysis, theempty parking spaces of the parking lot and the license plate information of the occupied parking space are fed back to the center, all the data are stored in a background database, so that a user can quickly searches the vehicle while making a query; forward induction is carried out on the newly-in vehicle according to the specific distribution condition of the unoccupied parking spaces in combination with an induction screen, the real-time video of a parking space camera is stored in a rear-end disk array through the network; and when the user stops the vehicle, the parking space camera isused for grabbing the newly-parked vehicle, and the image information is stored in the back-end magnetic disk array; when the user searches the vehicle, the user can input the license plate information for searching through an inquiry machine, the inquiry machine compares with the license plate information in the rear-end disk array and gives feedback, and plans the path to the parking space in anelectronic map to guide the searching of the vehicle. The invention provides a safer, comfortable, convenient, and open environment for vehicle owners, and efficient and energy-saving operation of the parking lot can be realized.

The invention discloses an intelligent parking management method and system. The intelligent parking management method comprises the steps of obtain available parking lot information according to a target position of a vehicle, and providing a target packing lot. Through the scheme, the invention can integrate available parking lot information according to the target position of the vehicle and provide the target packing lot; can help improve the information and intelligent management level of parking, provide a more secure, comfortable, convenient, efficient and open environment, and achieve efficient, energy-saving and environmentally friendly operation of parking lots; and has a very high application value.

The invention discloses an azotetrazole-based energetic compound with the composition of M(ATZ)(L)n question mark mH2O, wherein, M refers to Mn, Co, Ni, Cu, Zn or Pb; ATZ refers to 5, 5'-azotetrazole ion, L refers to 1, 10-o-phenanthroline or 2, 2'-dipyridyl, n refers to 1 or 2, and m refers to an integer or a decimal between 0 and 10. In the invention, the 1, 10-o-phenanthroline or the 2, 2'-dipyridyl is introduced into the M(ATZ) as an ancillary ligand to obtain a novel compound, thus integrating the characteristics of high efficiency, insensibility and environmental protection of a catalyst on the premise of the combustibility improvement of composite propellants. The azotetrazole-based energetic compound has the advantages of simple preparation method and accessible raw materials.

The invention discloses a pyroxylin lacquer with low smell, wherein the pyroxylin lacquer has no benzene hydrocarbon, and the lacquer formula includes 10 percent-25 percent by weight of at least one resin, 25 percent-55 percent by weight of at least one of alcohol ether solvent, ester solvent or alcoholic solvent, , 20 percent-50 percent by weight of at least one curing agent, plasticizer and additive, the pyroxylin lacquer of the invention uses non-benzene solvent, and ensure the superiority of pyroxylin lacquer per se, so as to effectively avoid environmental pollution produced in production, construction and using process of the benzene hydrocarbon, and health hazard to production operator and constructer.

The invention discloses a pressing type emulsion spray nozzle, which comprises a head cap, a valve rod, a bottle cap and a pump assembly, and is characterized in that: a piston is arranged in a pump body and comprises a shaft neck and a sealing ring projecting outwards radially along the outer wall of the shaft neck; a circle of annular groove with an upward opening is formed on the outer wall of an ejector rod, and can be in splicing fit with the bottom edge of the shaft neck of the piston to realize sealing between the ejector rod and the piston; the piston is provided with a rib on the inner wall of the shaft neck; and the ejector rod is provided with a circle of circumferential convex ring, which can be tightly pressed against the rib, on the upper part of the annular groove. Compared with the prior art, the spray nozzle has the advantages that: the inner wall of the piston is provided with the rib and the outer wall of the ejector rod is provided with the convex ring, so that the piston can still move upwards along with the ejector rod under the action of friction between the rib and the convex ring in the resetting process of the ejector rod, a liquid absorption channel between the piston and a top plate can continually keep open, and emulsion left in the spray nozzle can be absorbed back into the pump body.

The invention discloses a 3D printer and a 3D printing method of a sodium alginate hydrogel. According to the method, a sol-like sodium alginate taken as a printing raw material is solidified through a calcium ion solution, and the sodium alginate hydrogel in a certain three-dimensional shape is obtained through 3D printing. The sodium alginate hydrogel printed by the method is in a continuous and uniform-thickness line shape and has good strength and toughness; a hydrogel model in a specific 3D shape can be prepared by the layer-upon-layer stacked printing method, the hydrogels with different colors or different functions can be obtained by adding pigments of different colors or materials with different functions. The method is simple to operate, safe and environmentally friendly, and cost is low; the method can be used for printing the sodium alginate hydrogel with a 3D structure on a large scale, and a material basis is provided for research areas such as tissue engineering, simulation robots and biosensors, which involve soft body sensing materials.

A vertical cracking tower for cracking used tyre and recovering industrial carbon black and fuel oil is composed of sealed vertical tower body, upper scrape stirrer, tyre feeding port, cracked gas outlet, upper hollow heating disc, lower hollow cooling disc, lower scrape stirrer and carbon black discharging port. Its advantages are convenient regulation and control, high quality and safety, liguht weight, and high crakcing performance.

The invention relates to a method and a device for comprehensively utilizing energy of high-pressure natural gas. The method comprises the following steps of: carrying out decarbonization and dehydration on the high-pressure natural gas; reducing a temperature and a pressure of the high-pressure natural gas by turbine expansion; generating electricity by shaft work output by a turbine expansion engine; carrying out cold energy collection on the natural gas subjected to turbine expansion by a heat exchanger, feeding the natural gas subjected to heat exchange by the heat exchanger into an internal combustion engine to generate chemical energy; generating electricity by the chemical energy; and feeding high temperature fume generated by the internal combustion engine into a waste heat boiler to generate steam or hot water. The device comprises a high-pressure natural gas pipeline, a low-pressure natural gas pipeline, a pressure regulator, a valve, the turbine expansion engine, a turbine expansion engine generating set, an internal combustion engine generating set, the heat exchanger, a decarbonization and dehydration mechanism, a frequency converter and the waste heat boiler. The decarbonization and dehydration mechanism is connected with the high-pressure natural gas pipeline and the turbine expansion engine. The turbine expansion engine is connected with a generator and the heat exchanger. The heat exchanger is connected with the low-pressure natural gas transmission and distribution pipeline, thermal fluid and a cold energy pipeline. The internal combustion engine is connected with the generator, the low-pressure natural gas pipeline and the waste heat boiler. Heat energy generated by the waste heat boiler is transferred to thermal equipment. Two types of electric energy are transferred to electric equipment through the frequency converter. The energy utilization rate is improved.

The invention discloses an automobile environment-friendly air conditioning system based on PM2.5 (Particulate Matter) monitoring, comprising a vehicular air conditioner body, wherein the vehicular air conditioner body comprises an air blower and a circulating air gate. The vehicular environment-friendly air conditioning system is characterized by further comprising a PM2.5 sensor and a control unit, wherein the control unit is connected with the air blower and is used for controlling the air quantity of the air blower; the control unit is connected with the circulating air gate and is used for controlling the circulating air gate to switch between inner circulation and outer circulation; the PM2.5 sensor is arranged on an air conditioner gas flow line; the control unit is connected with the PM2.5 sensor. According to the automobile environment-friendly air conditioning system based on PM2.5 monitoring, when the circulating air gate is in the outer circulation and the PM2.5 sensor monitors that PM2.5 is higher than a set value, the control unit controls the circulating air gate to switch into the inner circulation from the outer circulation, so that air pollution source is cut off, and the control unit controls a speed regulating module to increase the air quantity of the air blower, therefore in-vehicle air is circulated, and an air purification purpose is achieved.

The invention relates to a method for enriching scandium, titanium and vanadium from sulfuric acid method titanium dioxide waste acid, and for treating waste acid. The method comprises the steps that: titanium dioxide waste acid is subjected to two-stage neutralization by using calcium carbonate, such that white gypsum is obtained, and two-stage neutralization slag with enriched scandium, titanium and vanadium are obtained; the two-stage neutralization slag is dissolved by using titanium dioxide waste acid; the dissolution liquid is subjected to scandium extraction and stripping, such that crude scandium slag is obtained; scandium extraction residue liquid is subjected to titanium hydrolysis, such that high-titanium slag is obtained; the hydrolysis filtrate is subjected to neutralization vanadium precipitation by using sodium carbonate, such that vanadium slag is obtained; the liquid after vanadium precipitation is subjected to aeration and further neutralization with the two-stage neutralization filtrate, and can reach a discharge standard and can be discharged. With the method provided by the invention, scandium, titanium and vanadium can be effectively enriched from titanium dioxide waste acid, and the treated waste acid tail liquid can reach a discharge standard and can be discharged.

The invention relates to a surface treatment process of reddened copper foil for a high-grade FR-4 copper-clad plate, belonging to the field of a copper foil production process. The surface treatment process of the reddened copper foil for the high-grade FR-4 copper-clad plate is characterized by comprising the following steps: taking 12-70mu m high-temperature high-extensibility copper foil as a cathode, operating at a rate of 25.0+ / -0.1m / min, carrying out coarsening and solidifying fractal electro-deposition of tuberculiform metallic copper on the surface of the copper foil; electrodepositing a nano-level copper alloy layer, wherein the copper alloy can be observed that the crystal is in a punctiform shape by utilizing an electron scanning microscope, and the crystal belongs to whisker; and electrodepositing a nano-level zinc layer; and finally carrying out alkaline chromating, and coating a layer of silane coupling agent. In the process of electrodepositing a nano-level punctiform whisker copper-nitrogen alloy layer, the invention adopts nitrogen-containing heterocyclic ring organic addition agent to improve the appearance characteristic and the corrosion resistance after surface treatment. The reddened copper foil in the invention has the advantages of favorable normal temperature resistance, high-temperature oxydation performance, plating diffusion resistance, corrosion and etching resistance, favorable peeling resistance and high-temperature conversion resistance.

The invention relates to a fine roughing treatment technology for the surface of electrolytic copper foil. The fine roughing treatment technology includes the following processes of primary roughing, secondary roughing, primary curing, secondary curing, third-level roughing, zinc and nickel alloy plating, oxidization preventing, silane coupling agent treating and drying. The copper foil produced through the technology has relatively low surface roughness, meanwhile has very high stripping resisting strength, especially shows excellent bonding strength on plates of Tg 170 or above and is very suitable for low-loss and ultra-low-loss high-speed circuit boards. Key technology indexes of the copper foil produced through the technology reach the level of the same kind of products of advanced copper foil manufacturers such as Mitsui Mining and Smelting (MHT), Furukawa Electric (MP) and JX Nippon Oil (JTC-LC), replaces imported copper foil of the same kind and is applied to high multi-layer high-end plates, HDI high-end plates, halogen-free high-end plates and other high-end plates in China or Euramerican countries.

This invention provides a method of phosphorus removal in high-phosphate-content industrial wastewater and phosphorus resource recovery of high-phosphate-content industrial wastewater, solves the problems of phosphorus removal in industrial wastewater, domestic sewage and other types of sewage and phosphorus resource recovery, and is particularly applicable to the field of the high-phosphate-content industrial wastewater. The method comprises the following steps: uniformly mixing 0 to 0.5 part of inorganic electrolyte, 0 to 2.5 parts of a water-soluble high-molecular polymer, 5 to 10 parts of calcium hydroxide (or calcium oxide) and 87 to 95 parts of soluble calcium salt in percentage by weight to obtain an inorganic-organic composite phosphorus removal chemical reagent; and adjusting the PH value of the wastewater with acid and alkali, oxidizing non-orthophosphate ions in the wastewater with an oxidant to adjust the acidity of the wastewater, and adding the inorganic-organic composite phosphorus removal chemical reagent to precipitate the phosphorus in the wastewater. The total amount of phosphorus in the wastewater is reduced from about 15500 mg / L to 5 mg / L or below. The main component of a filter cake is hydroxyl calcium phosphate, and the phosphorus content reaches 15 percent or above; and the filter cake can be used for preparing phosphoric acid or phosphate fertilizer.

The invention relates to an energy-saving recycling treatment disposal system and an energy-saving recycling treatment disposal process for an organic solid waste. The energy-saving recycling treatment disposal process mainly comprises a continuous sludge pyrohydrolysis anaerobic digestion section, a sludge dehydration heat drying section and a dry sludge, domestic garbage and biogas mixing incineration section. Due to the energy-saving recycling treatment disposal system and process disclosed by the invention, the innocent treatment of kitchen garbage, municipal sludge and the domestic garbage can be thoroughly realized by combining a high-temperature sludge anaerobic digestion technology with the high-organic matter characteristic of the kitchen garbage by utilizing respective characteristics of three solid wastes, applying a solid waste high-temperature incineration technology of mixed biogas, adopting a reasonable energy resource integrated means and applying an advanced high-temperature continuous pyrohydrolysis pretreatment technology. In addition, the energy-saving recycling treatment disposal process disclosed by the invention can also be used for realizing the recycling of the three solid wastes, improving the energy resource utilization efficiency of an integrated system, effectively reducing the input of external energy resources and reducing the operation cost. The energy-saving recycling treatment disposal process disclosed by the invention is capable of realizing the continuous operation of solid waste treatment, simple and reliable, simple in equipment, small in initial investment and has good environmental and economic benefits.

A solar greenhouse muskmelon organic ecological soilless culture technology is characterized by including substrate preparation, culturing tank placing, variety selection, seed processing, sowing and seedling raising, scientific planting, moisture management, nutrition management, plant regulation, greenhouse environment regulation and control, and pest control. By the technology suitable for vegetable farmers to grow muskmelon in solar greenhouses, the problems of labor consuming, water and fertilizer waste, severe soil-borne diseases, and the like in the existing muskmelon culturing methods are solved.

The invention relates to the field of fabrics dyeing and finishing processes, in particular to a process for dyeing fabrics by combining with plasma and ultrasonic and a special device thereof. The special device comprises low-temperature normal-pressure plasma equipment, grafting reaction equipment, ultrasonic dyeing equipment, a rinsing bath and two groups of control systems, wherein the low-temperature normal-pressure plasma equipment, the grafting reaction equipment, the rinsing bath and the ultrasonic dyeing equipment are sequentially connected, one group of control systems is connected with the low-temperature normal-pressure plasma equipment, and the other group of control systems is connected with the ultrasonic dyeing equipment. The invention organically combines the low-temperature normal-pressure plasma equipment and the ultrasonic dyeing equipment, solves the problem that the dye uptake and the dyeing quality can not improved in a process of dyeing fabrics in a high crystalline region or solves the problem of high energy consumption and high pollution in the dyeing process, and can effectively realize that the dye uptake and the dyeing quality can be improved while realizing environmental-friendly production with low energy consumption and low pollution.

The invention discloses an assembled concrete traffic pavement which is formed by splicing pavement prefabricated members, wherein each pavement prefabricated member comprises an upper wear-resisting layer and a lower stress structure layer, and the wear-resisting layer is fixedly connected with the lower stress structure layer; gaps are reserved at the spliced joints of the mutually spliced pavement prefabricated members, and a gap stress layer is formed on the gap poured concrete. The invention further discloses a construction method of the assembled concrete traffic pavement. The pavement prefabricated members disclosed by the invention are light in structure, high in strength, and good in wear resistance, and are integrally fabricated and spliced to form a traffic pavement, and the pavement is short in construction period and is not limited by weather and seasons.

The invention relates to a diesel particle filter regenerating unit and a control method for the regenerating unit, and belongs to the technical field of diesel particle filter regenerating. The diesel particle filter regenerating unit and a control method for the regenerating unit are characterized in that an regenerating electric control unit (ECU) judges the regenerating opportunity according to the a exhausting pressure difference and a temperature difference of the upstream and the downstream of the diesel particle filter; while regenerating, the ECU controls a magnetic valve, a sewage tank magnetic valve, a high pressure pump, a rotary motor and a high pressure pulse rotary undershoot nozzle at the two ends of the diesel particle filter to conduct high pressure water pulse jet cleaning; water is injected into the inner cavity of the diesel particle filter, and ultrasonic generator is started to conduct ultrasonic vibration cleaning; and regenerating sewage flows into an sewage tank, exhausting thermal energy is utilized to evaporate the regenerating sewage, and centralized harmless treatment is conducted on soot accumulation. According to the regenerating control method for the regenerating unit, through high pressure rotary jet, combined with the ultrasonic vibration, regenerating of the diesel particle filter is achieved, and the service life can be prolonged effectively.

The invention aims to provide a highly efficient beneficiation reagent for copper-nickel polymetallic sulphide ores. According to the invention, the reagent is prepared from the following raw materials by mass: 0.05-0.40 parts of diesel, 0.80-1.30 parts of liquid butyl ammonium aerofloat, 0.30-0.80 parts of isopropyl ethylthionocarbamate and 0.20-0.60 parts of sulfur nitrogen nitrile ester. According to the invention, the application of the reagent in beneficiation of the copper-nickel polymetallic sulphide ores can greatly reduce the content of magnesium oxide in the copper-nickel concentrate ores and significantly increase the recovery rate of metals from the copper-nickel polymetallic sulphide ores so as to realize sufficient, efficient and comprehensive utilization of the existing copper-nickel mineral resources, extend the service life of mines and create good economic benefits and social benefits.

The invention discloses an environment-friendly flame-retardant rubber for shoe soles and a preparation method thereof. The environment-friendly flame-retardant rubber for shoe soles comprises the following components in parts by weight: 55-65 parts of 2# standard rubber, 8-12 parts of styrene-butadiene rubber, 25-35 parts of cis-1,4-polybutadiene rubber, 1-3 parts of sulfur, 2-4 parts of accelerator, 1-3 parts of stearic acid, 4-6 parts of nano zinc oxide, 0.5-0.7 part of releasing agent, 54-66 parts of reinforcing filler, 15-21 parts of softening system, 18-22 parts of red phosphorus, 4-6 parts of nitrogen-based flame retardant MCA (melamine cyanurate) and 18-22 parts of nitrogen-phosphorus flame retardant. In the invention, the natural rubber, styrene-butadiene rubber and cis-1,4-polybutadiene rubber are used as the main materials, the reinforcing filler and softening system are added to ensure the physical properties of the rubber, thereby ensuring the service life of the rubber sole, and the red phosphorus, nitrogen-based flame retardant MCA and nitrogen-phosphorus composite flame retardant NPR (nitrogen and phosphorus retardant) are together used as a flame retardant system, thereby providing excellent flame retardancy for the product. The invention has the advantages of simple method, low cost and favorable use effect.

The invention discloses an environment-friendly water foamed polypropylene master batch which is prepared from the following materials in parts by weight: 5-10 parts of modifier, 5-10 parts of LDPE (low-density polyethylene), 30-60 parts of microporous water-absorbing inorganic foaming material, 0.01-0.2 part of initiator, 1-3 parts of surfactant and 0.1-0.5 part of plastic antioxidant. The modifier is one or more of ethylene-vinyl acetate copolymer, ethylene-propylene rubber, ethylene propylene diene copolymer, SBS (styrene-butadiene-styrene), polybutene and POE (polyolefin elastomer). The polypropylene low-ratio foamed sheet has the characteristics of excellent comprehensive mechanical properties, favorable heat resistance, environment friendliness, high recoverability and the like, can substitute the polyethylene and polystyrene low-foaming products used at present, is applicable to the fields of automobiles, packaging, buildings and the like, and implements the functions of weight reduction, energy saving and environment friendliness.

The invention relates to processing technique for ornament material and building laminated fine wood board. It adjusts the glue and applies to the gluing machine, sending the wood chip to double coating machine then to the working platform and cold press on the cold forging machine. Putting the laminated wood board on the hot press, it forms into the blank made of wood chip and wooden jobbing sheet. It cut off its irregular parts, sanding both surface smooth, then coating the plate blank for double faces coating, spreading bottom and surface plates on the working platform, then cold and hot pressing, trimming and sanding to get the laminated wood board. The laminated wood board is moisture proof, water proof, durable and good in stability.

The invention relates to a chromium-free insulation coating material for non-oriented silicon steel. The coating material provided by the invention comprises the following components of: by weight, 100 parts of metal dihydric phosphate, 10-60 parts of an epoxy resin, 0.001-10 parts of a naphthenate or metal ethyl hexoate drier, 0.001-100 parts of an organic solvent, and 60-2000 parts of pure water. The metal dihydric phosphate is Al(H2PO4)3, Mg(H2PO4)2, Ca(H2PO4)2 or Zn(H2PO4)2. The epoxy resin is a water-soluble epoxy resin or an epoxy resin emulsion. After warp-wise coating of the non-oriented silicon steel, the chromium-free insulation coating material provided by the invention has highly transparent appearance, excellent insulation performance, corrosion resistance, adhesiveness, weldability and manufacturability. In addition, the defect that a chromium-free coating is sticky and is not wear resistant is eliminated, and environmental protection of the non-oriented silicon steel coating can be realized.

The invention belongs to the technical field of firecrackers and particularly relates to a safe environmentally-friendly firecracker with two serially-connected built-in bodies, and the firecracker is used for solving the problem that an existing safe, environmentally-friendly and energy-saving firecracker has a limited sound number and has difficulty in building festival atmosphere brought by the traditional firecracker. The firecracker comprises a plurality of single bodies, wherein each single body comprises a connecting piece and a fixed leading plug; each connecting piece is of a cylindrical structure with one closed end; each fixed leading plug comprises a table body at one end and a cylinder at the other end, and each cylinder is integrated with the small-diameter end of the corresponding table body; the cylinder part of each leading plug is inserted into the cylindrical structure of each connecting piece; the table body part of each fixed leading plug is inserted into a metal shell respectively; and outer shells are sleeved outside the metal shells and the connecting pieces. The built-in safe environmentally-friendly firecracker has the following beneficial effects: zero discharge is basically realized, air pollution, dust pollution and potential safety hazards caused by the traditional firecracker are overcome to the greatest extent, the advantages of the traditional firecracker and the existing safe and energy-saving firecracker are combined, and safety, environmental friendliness and energy conservation are realized to a greater extent.