34results about How to "Overcome the disadvantages of polluting the environment" patented technology

A vapor deposition method used for pre-treatment of permanent magnet anticorrosion relates to the field of surface treatment of materials. The invention adopts physical vapor deposition technology to deposit a nanometer multi-layer structure film on the surface of NdFeB. Before this step, the NdFeB surface can be passivated, and after this step, an electrophoretic method can be used to deposit a coating. The invention discloses a method for pre-treating magnetic material NdFeB by adopting gas phase deposition technology to replace phosphating. This technology can overcome the NdFeB magnetic performance damage caused by the phosphating process. The method is green and pollution-free, the process parameters are easy to control, and has broad application prospects. The transition group metal / nitride composite coating prepared by the method has excellent bonding performance with the NdFeB permanent magnet, and can significantly improve the corrosion resistance of the NdFeB permanent magnet when matched with an electrophoresis or electroplating process.

The invention discloses a method for electrolytically refining crude lead. The method comprises the following steps of: adding sodium hydroxide and tartaric acid into water in turn, and stirring to dissolve at normal temperature to obtain a mixed solution; adding lead oxide powder into the mixed solution, dissolving and filtering to obtain filtrate, namely electrolyte; and adding the prepared electrolyte into an electrolytic cell, and switching on direct current for electrolysis by taking a stainless steel plate or a pure lead plate as a cathode and crude lead to be refined as an anode. By the method, smoke and middle slag generated in pyro-refining are avoided, the direct recovery rate of lead and comprehensive recovery rate of valued metals in the refining process are improved, volatile smoke or acid mist cannot be generated, and a defect that electrolyte in a silicofluoric acid system pollutes environment is overcome; meanwhile, the sodium hydroxide and the tartaric acid are added into the electrolyte, so that the sodium hydroxide and the tartaric acid can form a complex with the lead oxide, the concentration of lead ions in the electrolyte is greatly increased and the electrolysis efficiency is improved.

The invention relates to the nitrogen manure, in particular to the slow-release and long-effect urea fertilizer coating a layer of biochemical inhibitor on the urea surface and the preparation process. The fertilizer components are the urea, the biochemical inhibitor, the bond and the organic solvent. The process is that: the levitated solution mixed with the biochemical inhibitor, the bond and the organic solvent is sprayed and coated on the surface of the molding urea granule under the fluidized state through a fluidized bed to gain the slow-release urea fertilizer. The fertilizer of the invention makes full play of the functions and effects of two biochemical inhibitors, makes the fertilizer effect period prolonged obviously and realizes that once basal nitrogen fertilizer application can meet the requirement of whole growing seasons on the nitrogen. The agricultural production saves labor and time with low production cost and friendly environment. For the secondary processing of the urea, the preparation process of the invention has simple operation and easy realization and can carry out industrial production on a large scale.

The invention relates to a wastewater treatment device with coupled Electro-Fenton and electrocatalytic oxidation without solid waste generation. The wastewater treatment device comprises a raw water pump, a first diaphragm electrolytic cell, a second diaphragm electrolytic cell, a Fenton reaction tank, a coagulating sedimentation tank and an iron cement dissolving tank which are connected in sequence, wherein the anode chambers of the first diaphragm electrolytic cell and the second diaphragm electrolytic cell are adopted for electrocatalytic oxidation reaction to dissolve organic pollutants; Fe<+3> generated after Fenton reaction is reduced into Fe<+2> in the cathode chamber of the first diaphragm electrolytic cell; H2O2 is generated through electrochemical synthesis in the cathode chamber of the second diaphragm electrolytic cell; the reduced Fe<+2>, the newly generated H2O2 and wastewater are fed into the reaction tank for Fenton reaction; the effluent is subjected to iron cement separation in the coagulating sedimentation tank; treated water is discharged; the sedimentary iron cement is Fe<+3> which is fed into the iron cement dissolving tank; after acid dissolution, the sedimentary iron cement is fed into the cathode chamber of the first diaphragm electrolytic cell and is circulated after electrochemical reduction; and therefore, solid waste production and emission are avoided.

The invention relates to a cyclic utilization device of dyeing and printing advanced treatment wastewater and a method thereof. The cyclic utilization device contains a nanometer catalytic electrolysis system, an immersed ultrafiltration-membrane filtration separation system and an electrodialysis system which are connected in turn, wherein the dyeing and printing advanced treatment wastewater passes through the nanometer catalytic electrolysis system, the immersed ultrafiltration-membrane filtration separation system and the electrodialysis system in sequence to perform nanometer catalytic electrolysis, ultrafiltration and filtration, and electrodialysis treatment. The cyclic utilization device of the invention has the outstanding advantages that the recovery rate of water is high, the cost is low, the decoloring and deodorizing effects are good, the total discharge amount of wastewater chemical oxygen demand (COD) can be greatly reduced, the biological pollution of membrane can be eliminated, no secondary pollution is caused, the amount of sludge can be greatly reduced, the floor space is small, the quality of the reused water is high, the energy consumption is greatly reduced during the operation of the device, etc.

The invention relates to a halogen-free environmental friendly fire retarding polypropylene material which comprises the following components (percentage by weight): 40 to 70 percent of polypropylene granules, 25 to 38 percent of halogen-free intumescent fire retardant, 0.5 to 1.5 percent of lubricant, 0.1 to 0.5 percent of antioxidant, 0.5 to 1.5 percent of coupling agent and filler surplus. The polypropylene material is made by the following method: polypropylene granules and other components are evenly mixed inside a high-speed mixer according to certain proportion and then are extruded by a twin screw extruder, cooled down and granulated under the conditions of routine feeding speed, temperature and screw stem rotary speed. With ideal flame retardant property and mechanical property, the polypropylene material is characterized by low smoke, low toxicity and no melt drip as compared with fire-retarding polypropylene, thereby reducing environmental pollution and doing less harm to human body.

A small-sized fresh noodle making and selling machine for automatic packaging, belonging to the field of commercial equipment, including a frame, a noodle making machine, a paper packaging machine, and a control system; the frame is composed of multiple components; the noodle making machine is installed On the frame; the noodle conveying device is installed below the noodle cutting device; the paper packaging machine is installed on the frame; the control system is installed on the frame, including a control box, a controller, a display, Payment system, information collection system; it can realize automatic on-site production and sales of fresh noodles, and realize paper packaging, which overcomes the fact that the existing fresh noodle production and sales machines cannot be automatically packaged, and its packaging cannot match the noodles sold, and the pollution of plastic bag packaging The characteristics of the defects of the environment.

The invention discloses a preparation method of a micro-nano suspension beam arm-structured elastic contactor. The preparation method specifically comprises the following steps of (1) photoetching: adopting a photoetching process to transfer a mask pattern to a Si substrate; (2) etching: etching a semispherical silicon groove in the Si substrate by an etching machine; (3) film coating: forming a hollow-out coated film in the semispherical silicon groove, wherein the film coating material is copper alloy; (4) brazing: brazing the hollow-out coated film on the other material substrate; and (5) removal of the Si substrate: removing the Si substrate by adopting a physical method or a chemical method to obtain the elastic contactor. The preparation method of the elastic sheet or the elastic contactor provided by the invention is simple in process, and adopts dry etching and film coating, so that environment pollution can be almost avoided, and the shortcoming of environment pollution causedby an electroplating process or a chemical corrosion process can be overcome; and in addition, by virtue of the preparation method, high processing efficiency is achieved, and dimensions and processing precision can be ensured.

The invention discloses a surface pretreatment device for a polycrystalline silicon ingot and a treatment method thereof. The problems of serious environmental dust pollution, and low surface cleaning quality and efficiency in the prior art are solved. The surface pretreatment device comprises a corrosion pool (5), an ultrasonic soaking pool (7) and a rinse spray pool (8) sequentially arranged on a pretreatment pool bracket (4), wherein a drainage pipeline (14) is arranged at the center of the bottom surface of a rectangular corrosion pool body (9) of the corrosion pool (5); a drainage control valve (15) is arranged on the drainage pipeline (14); pool bottom grooves (10) are arranged at the bottoms on the left side and the right side of the rectangular corrosion pool body (9); an electric heater (11) is arranged in each pool bottom groove (10); and an acid liquor input pipe (12), an alkali liquor input pipe (13), a purified water input pipe (17) and a compressed air input pipe (18) are respectively arranged on the inner lateral wall of the rectangular corrosion pool body (9). The extracting quality of the silicon ingot and the reuse rate of rim charge are improved.

The invention discloses an inner fireworks barrel and fireworks with the inner fireworks barrel. The inner fireworks barrel comprises a cylindrical barrel body for storing an explosive mixture; a top cover is arranged at the upper end of the barrel body, and while a base is arranged at the lower end of the barrel body; the top cover comprises a cover body, and a first annular sidewall which is axially stretched along the outer round surface of the cover body; the inner wall surface of the first annular sidewall is in connection fitting with the outer round surface of the upper part of the barrel body; the base comprises a base body, and a second annular sidewall which is axially stretched along the outer round surface of the base body; the inner wall surface of the second annular sidewall is in connection fitting with the outer round surface of the lower part of the barrel body; a line guide hole is formed in the base body. According to the inner fireworks barrel, the processing technique is simplified; in addition, the top cover and the base can be conveniently produced by mass, and therefore, the cost is reduced, and the processing efficiency is increased; meanwhile, the structure that the inner wall surface of the annular sidewall is in connection fitting with the upper outer round surface and the lower outer round surface of the barrel body is adopted to reliably ensure the connection reliability of the top cover, the base and the barrel body.