摘要:
The invention relates to a method for producing a biofuel from an aqueous mixture of carbonised biomass obtained by means of a method for the hydrothermal carbonisation of biomass, characterised in that it comprises: (a) grinding the aqueous mixture of carbonised biomass until a maximum size of less than 500 micrometres of the particles contained in the mixture is obtained; (b) applying a method for the physical separation of inorganic substances; and (c) reducing the moisture content until a water content of between 25 and 55 wt.% is reached. The invention also relates to the biofuel obtained by said method, and to the use thereof in various applications.
摘要:
This specification relates to the field of power engineering and, more specifically, to systems for generating electricity based on the use of solid fuel, primarily brown and black coal. A coal gasification method is disclosed in which a gasifier is fed with a uniform activated coal water fuel. The droplets of fuel are ideally of equal size and have coal particles with similar granulometric composition. The fuel droplets are introduced intermittently in separate doses of fuel with a certain amount of motion being imparted thereto. The milling of coal for activated coal water fuel preparation is adjusted adaptively according to the criterion of the actual amount of volatile substances given off by the coal, and the coal is thoroughly classified according to its granulometric composition. The disclosed method can enable more extensive recovery of thermal energy from coal and more efficient electricity generation.
摘要:
A method for producing a lignite product comprising the steps of (a) digging lignite from a lignite seam, (b) grinding the lignite, (c) forming a slurry comprising the lignite, (d) transporting the slurry to a locus for drying, and (e) drying the slurry to form a lignite product, wherein steps (a) to (c) are carried out using a mobile device.
摘要:
An energy efficient process for converting biomass into a higher carbon content, high energy density slurry. Water and biomass are mixed at a temperature and under a pressure that are much lower than in prior processes, but under a non-oxidative gas, which enables a stable slurry to be obtained containing up to 60% solids by weight, 20 - 40% carbon by weight, in the slurry. The temperature is nominally about 200°C under non-oxidative gas pressure of about 150 psi, conditions that are substantially less stringent than those required by the prior art.
摘要:
Process for the preparation of an aqueous tar suspoemulsion by mixing a mixture comprising: (a) a viscous tar composition formed from a tar, from inorganic solids and, optionally, from water; (b) water (W); (c) a surface-active agent (SA) exhibiting an HLB of at least 10 and, optionally, (d) a thickening water-soluble polymer (TWP) with a molecular mass of greater than 10,000, the relative amounts of constituents (W), (SA) and, optionally, (TWP) being such that the viscosity of the (W) + (SA) + optional (TWP) mixture is preferably equal to or greater than the viscosity of the said tar, and then optional dilution of the mixture obtained with water or with an aqueous acidic solution. Application to the residues, containing sulphuric acid, resulting from the synthesis of white oils from petroleum fractions. The present invention further relates to a method for fluidizing acidic tars/sludges comprising contacting the tar/sludge with sulphuric acid and a surfactant. Optionally, a carrier for the surfactant's incorporation into the tar/sludge can be utilized. This provides an effective process for cleaning sulphuric acid tars/sludges from containers/vessels such as transportation containers, pipes and storage tanks. Preferably, the process comprises the additional step of regeneration of sulphuric acid from the fluidized tar/sludge.
摘要:
The present invention concerns a process for the preparation of coal aqueous suspensions characterized by high fluidity and high coal loading, comprising admixing coal, water and new anionic dispersing agents essentially consisting of starch sulfate, optionally mixed and/or esterified with aromatic acids, the corresponding salts or the corresponding anhydrides, and subsequently stirring the thus obtained mixture; furthermore, coal aqueous suspensions obtained according to the above process and a new class of anionic dispersing agents contained therein are described.