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1852results about "Solid separation" patented technology

Apparatus and process for mediated electrochemical oxidation of materials

A unique apparatus unique apparatus and process that uses mediated electrochemical oxidation (MEO) for: (1) Destruction of: a) nearly all organic solid, liquid, and gases materials, except fluorinated hydrocarbons; b) all biological solid, liquid, and gases materials; c) and/or dissolution and decontamination (such as cleaning equipment and containers, etc.) of nearly all inorganic solid, liquid, or gas where higher oxidation states exist which includes, but is not limited to, halogenated inorganic compounds (except fluorinated), inorganic pesticides and herbicides, inorganic fertilizers, carbon residues, inorganic carbon compounds, mineral formations, mining tailings, inorganic salts, metals and metal compounds, etc.); and d) combined materials (e.g. a mixture of any of the foregoing with each other); henceforth collectively referred to as materials. (2) Sterilization/disinfection of equipment, glassware, etc., by destroying all existing infectious materials. (3) Dissolution of transuranic/actinide materials and/or destruction of the oxidizable components in the hazardous waste portion of mixed waste. (4) Generation of hydrogen and oxygen from MEO of materials. (5) Alteration of organic, biological, and inorganic materials by MEO to produce other compounds from these materials. The materials are introduced into an apparatus for contacting the materials with an electrolyte containing the oxidized form of one or more reversible redox couples, at least one of which is produced electrochemically by anodic oxidation at the anode of an electrochemical cell. The oxidized forms of any other redox couples present are produced either by similar anodic oxidation or reaction with the oxidized form of other redox couples present and capable of affecting the required redox reaction. The oxidized species of the redox couples oxidize the materials molecules and are themselves converted to their reduced form, whereupon they are reoxidized by either of the aforementioned mechanisms and the redox cycle continues until all oxidizable material species, including intermediate reaction products, have undergone the desired degree of oxidation. The entire process takes place at temperatures between ambient and approximately 100° C. The oxidation process may be enhanced by the addition of reaction enhancements, such as: ultrasonic energy and/or ultraviolet radiation.
Owner:SCIMIST LNC

Method for manufacturing building material from building garbage

The present invention relates to a method for manufacturing the building material with the building garbage, the method executes sorting, magnetic separation, primary crushing and gravity sorting to the city building material, and the building material is separated to heavy material, light material and mineral material, the mineral material is used for manufacturing the building material after the secondary crushing, and the raw material of the building material comprises the following components: fiber material 5-10 parts, mineral material 40-60 parts, low-water cement 20-30 parts and other material 0-30 parts, the production process of the building material comprises the steps of mixing the fiber material, mineral material and other material to uniform, then adding the low-water cement for mixing to uniform, adding water and stirring to slurry, placing into the mold for jolt molding or extrusion molding, and forming the building used sheet material after natural curing. The method of the invention has the advantages of full utilization of the mineral material comprising the major component of the building garbage, saving the material resource, reducing the final discharging amount of the building garbage, and the method can be used for manufacturing the building materials such as hollow brick, hollow block, partition plate and the like.
Owner:BEIJING HENGYECUN S&T

Apparatus and process for treating waste

A method for treating municipal solid waste and other waste is provided which comprises: introducing said waste into a rotary autoclave which is downwardly inclined towards its discharge end and has a door at the discharge end; and injecting steam through said door into said autoclave to treat the load. A method is also provided for treating waste, comprising steam autoclaving the waste, anaerobically digesting an organic-rich fraction of the autoclaved waste, recovering methane-containing gas from anaerobic digestion, internally combusting the methane-containing gas to generate power and exhaust gas, and generating steam for autoclaving using the waste heat. A plant for treating the waste may comprise at least one autoclave for steam treating the waste, at least one anaerobic digestion tank for digesting an organic-rich fraction of the autoclaved waste, a recovery system for recovering methane-containing gas from the or each digestion tank, at least one internal combustion engine for combusting the methane-containing gas and generating power, and a steam generator fed with combustion gas from the internal combustion engine for generating and accumulating steam for supply to said at least one autoclave. Also provided is a method of treating waste material in a rotary autoclave, which comprises: loading the waste material into a top opening of the autoclave whilst rotating the autoclave in a first direction in which screw flights within the autoclave convey the waste forwardly along a downwardly inclined body of the autoclave towards a base of the autoclave; rotating the autoclave in a second direction opposite to the first direction so as to establish a circulation of the loaded material between the upper and lower ends of the autoclave to facilitate vacuum and/or steam treatment thereof; and monitoring the load imparted by the autoclave adjacent upper and lower ends thereof during the reverse rotation, increase of the load adjacent the upper end of the autoclave providing an indication of effective load circulation. A door structure for a commercial-scale autoclave based on a castellated door and a locking ring with lock blocks of inwardly facing U-structure is also provided.
Owner:AEROTHERMAL GROUP

Method for preparing low-carbon metal manganese iron by using manganese-poor powdered ore

The invention relates to a low-carbon ferromanganese production method using low-grade manganese mineral powder. The low-grade manganese mineral powder which has rich reserves is heated by a micro-wave oven, reduced by carbon, smelted at high temperature, purified by magnetic separation to directly prepare low-carbon ferromanganese. And the production method saves sintered agglomeration process with large energy consumption and serious pollution. The low-carbon ferromanganese with high purity is made through the steps that: the material is carefully chosen, crushed, fine- grinded, sieved, mixed, stirred, preheated by the micro-wave oven, pre-reduced through carbon monoxide, finally reduced, smelted at high temperature, cooled under the protection of nitrogen and purified by magnetic separation. The preparation method has the advantages of short technological process, less using equipment, being suitable for large- scale industrialization production, the yield rate can reach 98 percent, wherein manganese content is 75 percent and iron content is 20 percent, and the content of carbon is less than 0.5 percent; the content of harmful material sulfur is also less than 0.5 percent; the content of phosphor is less than 0.2 percent. The products have the advantages of low carbon, low phosphor and sulfur containing, no agglomeration, no pollution to environment. The method is the ideal ferromanganese direct production method using low-grade manganese mineral powder and fills up a scientific research blank in the field in China.
Owner:TAIYUAN UNIV OF TECH
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