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9592results about How to "Solve pollution" patented technology

Harmless disposal method of kitchen garbage

The invention relates to a harmless disposal method of kitchen garbage, which comprises the following steps of: (1) pretreatment: after unloading the kitchen garbage, performing solid-liquid separation, rough crushing, crushing and sorting and performing magnetic separation, and recycling metal substances mixed in the kitchen garbage; (2) hydrothermal hydrolysis: after the pretreatment, adopting the hydrothermal hydrolysis to fully inactivate viruses and bacteria in the kitchen garbage, separating out animal and vegetable fatty oil from the kitchen garbage, and hydrolyzing organic materials at the same time; (3) using the fatty oil obtained in the step (2) as an industrial fatty oil material or further performing deep processing to obtain fatty acid methyl ester or biodiesel; mixing and proportioning the pasty organic materials and then conveying into an anaerobic fermentation system; and conveying large granular organic materials into an aerobic biological fermentation device. The method provided by the invention realizes harmless disposal of the kitchen garbage mainly by the pretreatment and the hydrothermal hydrolysis process, increases the conversion rate of biological energy of the kitchen garbage and increases the economic benefit of kitchen garbage recycling products.

Graphene/carbon black thermoplastic resin master batch with high dispersibility and preparation method thereof

The invention discloses a graphene/carbon black thermoplastic resin master batch with high dispersibility and a preparation method thereof. The graphene/carbon black compound in the master batch is formed in an electrostatic self-assembly manner, and comprises 10-50% of graphene, 5-20% of carbon black, 0.5-10% of surfactant, 10-65% of carrier resin and 2-10% of assistant. The preparation method comprises the following steps: (1) compounding and dispersing graphene by adopting the surfactant to control the positive electricity of the graphene surface; (2) forming a stable graphene/carbon black compound from the modified graphene and carbon black with positive electricity through electrostatic incorporation in a self-assembly manner; (3) preparing the graphene/carbon black thermoplastic resin master batch with high dispersibility by matching with a solution blended process, a melt-blending method and an in-situ polymerization method; (4) adding the assistant to extrude and pelletize, so as to prepare the graphene/carbon black/thermoplastic resin master batch particles after processing the master batch. By adopting the obtained master batch, the problems of difficult charging of graphene powder, uneven dispersion, dust pollution, unstable product performance and the like are solved.

Application of tungsten-based catalyst in lignin catalytic hydrogenation for producing aromatic compound

The invention relates to hydrocracking of lignin, and specifically relates to a method for applying a tungsten-based catalyst to catalyze lignin hydrocracking for producing an aromatic compound. The catalyst comprises a main active component of non-zero-valent tungsten, and a second metal component of a small amount of one or more transition metals selected from zero-valent nickel, cobalt, ruthenium, iridium, palladium, platinum, iron, and copper. According to the method, raw materials such as lignin, biomass hydrolysis residue, lignosulfonate, and alkaline lignin are subject to catalytic hydrogenation under a hydrothermal condition with a temperature of 120 to 450 DEG C and a hydrogen pressure of 1 to 20MPa; the raw materials are cracked into C6-C9 phenolic compounds with high selectivity. A maximal phenol yield reaches 55.6%. Compared to existing technologies, according to the invention, renewable natural biomasses are adopted as raw materials, such that the raw materials are cheap, and have wide sources; inorganic acid and alkali are not required, such the production of a large amount of alkaline solution in traditional lignin catalysis is avoided; the tungsten-based catalyst is cheap; the reaction process is green, and has atom economical characteristics.

Method for recovering valuable metals from waste printed circuit board

The invention discloses a method for recovering valuable metals from a waste printed circuit board. The method comprises the following steps: sorting and crushing the printed circuit board, evenly mixing powder containing multiple metal parts with a fluxing agent, and smelting at low temperature for 1-3.5h; adding hot water into smelting products for leaching; evaporating and concentrating filtrate after filtration, and then returning evaporation mother liquor to the water leaching process step; using solution after leaching for swirl electrodeposition of metal silver, and adding 5-25% of HNO3 into filter residue for leaching; filtering the solution after electrodeposition, and adding 1-5 times of the weight of aqua regia into the filter residue for leaching; using the solution after leaching by the aqua regia for the swirl electrodeposition of gold, adding saturated NH4Cl into the solution after the electrodeposition for reaction, then filtering, using ammonium chloroplatinate for refining the filter residue, obtaining sponge platinum, adding methanoic acid into the solution after precipitation, and carrying out reaction for obtaining crude palladium powder. The method can extract copper, nickel, silver, gold, platinum, palladium and other main products and other by-products, realize the maximization of reutilization of value metal resources in the waste printed circuit board and solve the environmental pollution problem; and the adoption of the swirl electrolysis technology can realize low energy consumption, low reagent consumption, short process flow and simple operation.

Device and method for manufacturing airflow melting electrostatic spinning nano-fiber non-woven fabric

The invention relates to a device and a method for manufacturing an airflow melting electrostatic spinning nano-fiber non-woven fabric. The device for manufacturing the airflow melting electrostatic spinning nano-fiber non-woven fabric comprises a stock hoper, a screw extruder, a filter, a metering pump, a material path, a melt-blown die head, a hot-air pipeline, an air compressor, a heating device, a high voltage electrostatic generator and a receiving device. The material path is made of high thermal conductivity insulating ceramics. The method for manufacturing the nano-fiber non-woven fabric adopts the device disclosed by the invention and comprises the following processing steps: (1) preparing a polymer melt; (2) jetting nano-fibers by using airflow static electricity; and (3) moulding the non-woven fabric. The method for manufacturing the nano-fiber non-woven fabric of the invention adopts airflow-melting electrostatic spinning technology, avoids a problem of pollution of electrostatic spinning solvent, and is novel environment-friendly non-woven fabric manufacturing technology. In the manufacturing method, high voltage electrostatic is directly acted on the melt-blown die head; the melt has high and uniform charge; and simultaneously by utilizing drafting of the airflow, the prepared nano-fiber has the advantages of thin diameter and narrow distribution. The device can meet production requirements by improving the conventional melt-blown manufacturing device, and has low implementation cost and easy industrialization promotion.

Energy-conserving textile fabric washing device

The invention discloses an energy-saving textile cloth cleaning device, which comprises a casing, the inner cavity of the casing is sequentially provided with a cleaning chamber, a drying chamber and a sterilization chamber from left to right, and a fixed frame on the left side of the casing passes through The fixed shaft is fixedly connected with the feed roller, the fixed frame on the right side of the housing is fixedly connected with the discharge roller through the fixed shaft, the upper left side of the housing is provided with a feed inlet, and the upper right side of the housing is provided with a The discharge port is fixedly connected with a water storage tank on the upper surface of the shell, and the bottom of the left side of the water storage tank is fixedly connected with a water delivery pipe, and a booster pump is fixedly connected with the water delivery pipe. The invention provides an energy-saving textile cloth cleaning device, which has the advantages of thoroughly cleaning and disinfecting the cloth, is effective in recycling the cleaning liquid to prevent water pollution, and has the advantage of effectively utilizing the heat in the drying chamber, solving the problem of The problems of waste of energy and incomplete cleaning of existing textile fabrics.

Electroplating wastewater zero-discharge or low-discharge handling method

The invention provides a processing method for zero draining or low draining of electroplating wastewater. The method adopts an integrative technique, such as barrier concentration, barrier separation, ion exchange, and ultraviolet light catalytic oxidation, etc. The following steps are adopted: the pretreatment of the electroplating wastewater; the treatment for the three types of wastewater including pickling wastewater, wastewater containing cyanide and passivating and electroplating rinsing composite wastewater; and the treatment for the wastewater in an acid-soluble pool. Compared with the wastewater in an integrative electroplating plant with universal generic multi-plating species, only the prior water separation method with no need to control the troubled water strictly can realize : first, zero draining of the electroplating wastewater is performed; second, when operating in the low energy consumption way, 65 to 85 percent of water recovery is realized, the left wastewater which can not be recovered is discharged when reaching the primary discharge standard of National Standard; third, the processing cost is reduced; fourth, the metallic ion in the wastewater can be effectively recovered and utilized, at the same time, the benefit disinvestment cost is produced; fifth, the amount for causing solid waste is reduced; sixth, the invention is advantageous to realize the automatic control and the operation.

Wind-solar power generation and hydrogen-production hydrogen-storage system and operation control method thereof

The invention relates to a wind-solar power generation and hydrogen-production hydrogen-storage system and an operation control method thereof, and relates to the technical field of new energy wind-solar power generation and hydrogen production. According to the invention, a rectifier at a fan side of a wind power farm is connected with a grid side inverter; a DC (Direct Current) bus is connectedwith a supercapacitor of a DC/DC convertor; the rear surface of the supercapacitor is connected with a hydrogen production and hydrogen storage system; a photovoltaic system is connected with the DC bus in front of the supercapacitor by the DC/DC convertor and is used as a power compensation unit of the wind power farm; the wind-solar power generation and hydrogen-production hydrogen-storage system further comprises a power coordination control module and a monitoring module; and problems of poor peak regulation capacity, unsmooth hydrogen production, short service life of equipment and the like of a wind-solar power generation and hydrogen-production hydrogen-storage system are mainly solved. The wind-solar power generation and hydrogen-production hydrogen-storage system has the characteristics that the system is high in peak regulation capacity; the requirement of a load evening peak can be met; smooth hydrogen production can be ensured; the service life of the equipment is prolonged; flexible grid connection can be implemented in the premise of ensuring purity of produced hydrogen; and an energy utilization rate is high.

Method for producing baking-free bricks by using phosphorous gypsum based cementitious material to solidify yellow phosphorous slags

The invention provides a method for producing baking-free bricks by using phosphorous gypsum based cementitious material to solidify yellow phosphorous slags. 1) The raw materials and formula of the invention are as follows: (1) the phosphorous gypsum cementitious material: 40-60 parts of phosphorous gypsum, 0-30 parts of yellow phosphorous slags, 0-30 parts of pulverized fuel ash, 0-5 parts of blast furnace slag, 10-15 parts of calcined lime, and 0-10 parts of carbide slag; (2) the mateirals of the baking-free brick green bodies: 100 parts of phosphorous gypsum cementitious material, 150-300parts of yellow phosphorous slags raw materials, 2-4 parts of activator, 0.2-1 part of auxiliary agent, and 10-40 parts of water. 2) The preparation method: the baking-free bricks are produced throughthe steps of treating raw materials, mixing the solution with additive, preparing brick blanks and moulding and conserving. In the production process of the invention, no organic matter is added, thus completely avoiding the pollution problems of toxic substance caused by degradation of organic materials, and the release of additive and volatilization of residues, and having the advantages of lowcost, good physical property, high production efficiency, saving of energy consumption and non environmental pollution.
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