Class 44/492 - Process including heat

Subclass of Class 44 - Fuel and related compositions
Definition: Process specific to preparing peat for a fuel, which utilizes
No. of patents: 26
Last issue date: 10/26/1999

Number	Title	Issue Date
5972058	Method of treating waste sludge The invention relates to a waste sludge treatment process in which a solid additive is mixed into sludge to produce solid products. The solid additive includes aggregate-like hydrophobic grains of peat....	10/26/1999
5413618	Method for the production of a peat substitute, installation for implementing said method, drying device, application of said method, and peat substitute produced according to said method Organic materials, more particularly wood and woody parts of plants, are intensely crushed, defibrated, heated and physically broken up in a thermal screw press, an impregnation with previously added auxiliary substances being simultaneously effected. The...	05/09/1995
5009697	Liquid organic peat fertilizer and process of preparing same A novel process has been provided for the preparation of both a liquid peat extract substantially-free from biologically-undesirable concentrations of metal elements and compounds, and a solid peat residue substantially-free from biologically-undesirable ...	04/23/1991
4895577	Low severity peat dewatering process A continuous, low severity process for dewatering peat. The process comprises the steps of flowing a slurry of peat through a reactor directly heated by the addition of live steam to heat the slurry to a temperature of between 160° C. to 200° C., subjec...	01/23/1990
4810258	Low rank coal or peat having impurities removed by a drying process A low rank coal or peat has various impurities removed therefrom by a drying process. The impurities may be removed in a subsequent operation. The dried coal or peat will not absorb substantial moisture when stored or transported....	03/07/1989
4728339	Multiple hearth apparatus and process for thermal treatment of carbonaceous materials A multiple hearth apparatus and process for the thermal treatment of organic carbonaceous materials under controlled pressure and temperature comprising a pressure vessel containing a plurality of superimposed annular hearths including hearths in a reacti...	03/01/1988
4725337	Method for drying low rank coals A process is disclosed for removing a substantial portion of water and impurities from low rank coal and peat, whereby an improved coal or peat product (not found in nature) is obtained. The low rank coal and peat are subjected to a superheated gaseous me...	02/16/1988
4720287	Low temperature thermal-chemical pretreatment process for peat dewatering This invention concerns dewatering peat by heating it and subjecting it to a surface active agent, preferably a cationic polymeric surface active agent and subsequently pressing the product to yield a peat product with lowered moisture content....	01/19/1988
4705533	Utilization of low rank coal and peat Low rank coals including lignite, brown and sub-bituminous coals, and peat containing unacceptably high quantities of water are dried and enriched in BTU content. The mine low rank coal is crushed to between about one-half inch and three inches in diamete...	11/10/1987
4702745	Process for dewatering high moisture, porous organic solid A high moisture porous organic solid is dewatered by the steps of (1) heating the high moisture porous organic solid in a fluid medium having an elevated temperature and a high pressure, thereby reducing the moisture of the solid, (2) starting to compress...	10/27/1987
4671802	Chemical enhanced fuel peat dewatering The present invention relates to an improved process of chemically enhanced peat dewatering by pretreatment of the peat substance with an acid and a cationic polyelectrolyte before mechanical dewatering....	06/09/1987
4650495	Method for stabilizing dried low rank coals A method for pyrophoric particle protection of carbonaceous material particularly low rank coals where the material is simultaneously coated with a treating agent and cooled by a fluidizing gas....	03/17/1987
4632731	Carbonization and dewatering process An energy efficient process for beneficiating and dewatering high water content carbonaceous materials utilizing a pneumatic stream to entrain, transport, dewater and to carbonize organic carbonaceous material in a fluidized bed. The process utilizes phys...	12/30/1986
4626258	Multiple hearth apparatus and process for thermal treatment of carbonaceous materials A multiple hearth reactor apparatus and process for the thermal treatment of organic carbonaceous materials under controlled pressure and temperature comprising in accordance with one embodiment, a pressure vessel containing a plurality of superimposed an...	12/02/1986
4597928	Method for fiberboard manufacture Disclosed in accordance with the invention is a method for fiberboard manufacture comprising the steps of steaming and grinding woodchips to obtain a wood pulp, using said wood pulp to prepare a slurry of wood pulp in water, mixing said slurry with a bind...	07/01/1986
4525172	Method of dewatering a cake of biomass A cake of biomass, preferably a peat cake, is dewatered by being pressed at a temperature above 90° C., whereby the water in the cake is displaced by warmer water under successively increased pressure. An apparatus designed as a closed wash press is then...	06/25/1985
4492588	Method for removing sulfur from fossil fuels A process for removal of sulfur from fossil fuels, such as coal, lignite, peat and fuel oil. The process includes the oxidative treatment of the fuel at or about ambient temperature, followed by a wash with a dilute basic aqueous solution of a basic compo...	01/08/1985
4447963	Method for producing a fuel from solid bituminous and/or lignocellulosic material The invention relates to a method for producing fuel from solid bituminous or lignocellulosic material. The material is charged, optionally continuously, to a closed vessel together with oil heated to a temperature in excess of 65° C., preferably in exce...	05/15/1984
4244700	Method of and apparatus for heat processing of pulverized solid fuel According to the invention pulverized solid fuel is processed by heating the fuel to a temperature at which thermal decomposition of the fuel begins and subsequently heating the fuel to a temperature at which an intense thermal decomposition of the fuel t...	01/13/1981
4229183	Method of refining solid fuel of organic vegetable material A method for refining organic material such as bark, wood shavings, wood chips, other wood waste and peat for use as a solid fuel or for gas generation in which the material after dewatering is disintegrated and dried by the flue gases passing from the he...	10/21/1980
4213752	Coal drying process A single step process for removing moisture from low rank coal using in-situ generated thermal energy by passing the wet low rank coal at room temperature into a moving bed of hot coal at a temperature in the range of from about 200° C. to about 300° C....	07/22/1980
4153420	Process for wet carbonizing of peat A process for the wet carbonizing of peat, wherein the peat is diluted and screened to become a raw peat suspension in a suspension preparing apparatus, the peat suspension thus obtained is preheated in series-connected heat exchangers and in a preheating...	05/08/1979
4129420	Process for making coke from cellulosic materials and fuels produced therefrom A process for converting cellulosic materials, including waste cellulosic materials, into a useful, low-sulfur and low-ash fuel by subjecting the cellulosic feed material to an autoclaving treatment at a controlled elevated temperature and controlled high...	12/12/1978
4127391	Process for making coke from bituminous fines and fuels produced therefrom A process for agglomerating bituminous fines into a useful low-sulfur particulated fuel by subjecting the bituminous fines to an autoclaving treatment at a controlled elevated temperature and controlled high pressure for a period of time sufficient to con...	11/28/1978
4097378	Multiple effect evaporation of water from water containing combustible sludges Water containing combustible sludges are dried with the multiple effect use of the heat required by adding recycled cool high boiling oil and heating the mixture by direct contact with steam produced as later described. Then the oil sludge mixture has wat...	06/27/1978
3990180	Peat containers for the planting of containerized seedlings As an article of manufacture, a plug shaped receptacle or hollow container made of peat, pre-shaped and reacted at conditions of temperature and pressure sufficient to cause reaction and polymerization of the naturally occuring functional groups of the pe...	11/09/1976

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Class 44/492 - Process including heat