摘要:
A method for refining pellets, in which, in a first step, pellets that have been pressed from a biomass are provided. A heat treatment is carried out, involving heating the pellets to a temperature between 210° C. and 390° C. The heat treatment takes a period of time of between 1 minute and 30 minutes. Also described is a device that is suitable for carrying out the method. The pellets treated in this way are water-repellent and so can be stored outdoors.
摘要:
A process for demineralizing coal includes the steps of forming a slurry of coal particles in an alkali solution, the slurry containing 10-30% by weight coal, maintaining the slurry at a temperature of 150-250° C. under a pressure sufficient to prevent boiling, separating the slurry into an alkalized coal and a spent alkali leachant, forming an acidified slurry of the alkalized coal, the acidified slurry having a pH of 0.5-1.5, separating the acidified slurry into a coal- containing fraction and a substantially liquid fraction, subjecting the coal-containing fraction to a washing step, particularly a hydrothermal washing step, in which the coal-containing fraction is mixed with water and a polar organic solvent or water and an organic acid to form a mixture and separating the coal from the mixture. The demineralized coal has an ash content of from 0.01-0.2% by weight and can be used a feed to a gas turbine.
摘要:
A process of drying moisture containing material having a tendency to create dust when dried, said process including the steps of providing said material in a heated chamber having a steam containing atmosphere at a temperature above the dewpoint of the steam, recirculating a hot gas including a portion of the steam through said chamber in order to evaporate moisture from the material to a predetermined level of dryness.
摘要:
A disposal method for entirely recycling solid refuse includes the following steps: sorting, crushing, drying, pressing with high pressure to shaped articles, producing charcoal from combustible refuse in high temperature and firing incombustible refuse in high temperature, at last cooling high temperature articles to obtain solid fuel with various shapes and bricks or board used for building. The method achieves entirely recycling house refuse, especial solid refuse. The method recycles solid refuse to obtain fuel and building material with economic value. The method is simple and its processing cost is low.
摘要:
A process for pretreating a biomass feedstock for gasification for the production of syngas. The biomass feed, which is preferably a lignocellulosic material, is subjected to torrefaction that increases its energy density, friability, and results in higher efficiency gasification of the torrefied biomass.
摘要:
Biogas is obtained in a solid-state anaerobic digester from a solid organic biomass and a digestion effluent produced in an associated liquid anaerobic digester. The solid organic biomass and digestion effluent are mixed to produce an effluent-biomass mixture. The effluent-biomass mixture is then incubated in the solid state anaerobic digester, producing a biogas and a digestate. The incubation is controlled by adjusting the composition and properties of the effluent-biomass mixture. The solid organic biomass may comprise lignocellulosic biomass, food waste, agricultural waste and the like.
摘要:
A solidified biomass consisting of semi-carbonized or pre-semi-carbonized solid matter is pressure-formed from raw biomass material while being heated under a substantially sealed-up condition to allow hemicellulose among the main components of the raw biomass material, i.e. lignin, cellulose and hemicellulose, to be thermally decomposed and to allow a low-temperature reaction to occur between the cellulose and lignin while maintaining their skeletons. The pre-semi-carbonized solid matter or semi-carbonized solid matter has a maximum compressive strength of 60-200 MPa and calorific value of 18-23 MJ/kg.
摘要:
It is known that a foamed slag can be produced on stainless steel melts in an electric arc furnace by introducing a mixture of metal oxides, limestone, carbon and a binder in the form of briquettes into the furnace so that the briquettes become arranged there in such a way that the metal oxides are reduced by the carbon and the limestone is thermally dissociated at the metal-slag interface beneath the slag and the resulting gases bring about foaming of the slag by bubble formation. This foaming on steels having a high chromium content, due to the significant uptake of chromium oxide by the slag, leads to problems which result from the physicochemical properties of slags having a high chromium oxide content. To provide, according to the invention, briquettes suitable for producing foamed slag having a high chromium oxide content, which is carried out, in particular by the process of WO 2010/003401 A1, all briquette properties to be taken into account and all materials suitable for briquette production are tabulated in the form of a matrix.
摘要:
Integrated cement production systems and methods implementing the systems are disclosed, where the integrated cement production systems include a burnable fuel supply subsystem, a cement raw material supply subsystem, a kiln subsystem and a cement clinker composition storage subsystem. The burnable fuel supply subsystem is adapted to receive one or a plurality of used and/or unused healthcare materials. The burnable fuel supply subsystem can feed the materials directly into the kiln subsystem, can convert the materials into different form and feed the different form to the kiln subsystem or feed a combination of the materials, different forms and optionally conventional fuels to the kiln subsystem.
摘要:
Polycarbon biofuels may be made from feedstock such as wood waste, agricultural wastes and waste paper. The feedstock may be cooked under acidic conditions to convert cellulose and similar material in the feedstock into a biofuel that is hydrophobic, readily pelletized, and has a high energy density. The biofuel may be blended with coal or other fuels to provide blended fuels that may be burned in conventional burners. One process forms a slurry of the feedstock, sparges carbon dioxide through the slurry to achieve a pH below 5 and cooks the slurry at temperatures in the range of 170 C to 300 C until conversion of the feedstock to polycarbon biofuel has occurred. The biofuel may be separated from liquids in the slurry by filtration.