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公开(公告)号：US11187458B2
公开(公告)日：2021-11-30
申请号：US16485332
申请日：2018-02-09
摘要： Disclosed is a slurry drying plant (1) comprising a slurry inlet (2) for feeding slurry to the slurry drying plant (1) and two or more meshing screw conveyors (3, 4) arranged to at least partly divide the slurry while conveying the slurry in a transport direction from the slurry inlet (2) to a slurry outlet (5). The slurry drying plant (1) further includes slurry heating means (6) comprising means for passing superheated steam substantially at atmospheric pressure past the slurry and the two or more meshing screw conveyors (3, 4), while they are conveying the slurry. Furthermore, a method for drying slurry and use of a slurry drying plant (1) is disclosed.
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公开(公告)号：US11459518B2
公开(公告)日：2022-10-04
申请号：US16652621
申请日：2018-10-12
摘要： Disclosed is a gasification unit (1) for producing a product gas. The gasification unit (1) comprises a co-current or counterflow pyrolysis unit (2) including a pyrolysis gas outlet (3) arranged at an upper part (4) of the pyrolysis unit (2) and a pyrolysis gas inlet (5) arranged at a lower part (6) of the pyrolysis unit (2). The gasification unit (1) further comprises a co-current or counterflow gasifier (7) including a product gas outlet (8) arranged at an upper part (9) of the gasifier (7) and a gasifier inlet (10) arranged at a lower part of the gasifier (7) and coke moving means (12) for allowing pyrolyzed coke (13) to move from the pyrolysis unit (2) to the gasifier (7). The gasification unit (1) also comprises recycling means (14) arranged to guide at least a part of the pyrolysis gas produced in the pyrolysis unit (2) from the pyrolysis gas outlet (3) and back to the pyrolysis gas inlet (5) and heating device (15) comprising an input conduit (16) arranged to guide pyrolysis gas from the pyrolysis gas outlet (3) to a combustion unit (17) in the heating device (15), wherein the combustion unit (17) is arranged to least a partially oxidize the pyrolysis gas from the pyrolysis unit (2), and wherein the heating device (15) comprises an output conduit (18) arranged to guide heating gas generated by the partial oxidization in the combustion unit (17) to the gasifier inlet (10), where in the heating device (15) is arranged external to the pyrolysis unit (2) and the gasifier (7) and wherein said gasification unit (1) further comprises heat exchange means (19) arranged for heating at least a portion of the pyrolysis gas before it enters the pyrolysis unit (2) through said pyrolysis gas inlet (5) by means of at least a part of the product gas exiting said gasifier (7) through said product gas outlet (8). Furthermore, a method for producing a product gas in a gasification unit (1) and use of such a method is disclosed.
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公开(公告)号：US11220644B2
公开(公告)日：2022-01-11
申请号：US16652648
申请日：2018-10-12
摘要： Disclosed is a method for reducing the tar content in pyrolysis gas generated in a pyrolysis reactor (1). The method comprises the steps of: guiding the pyrolysis gas through a filter (2) to remove at least 90% of all the particles in the pyrolysis gas having a particle size down to 7μ and preferably down to 4μ from the pyrolysis gas, partially oxidizing the pyrolysis gas in a partial oxidation reactor (3) to remove tar from the pyrolysis gas, and guiding the pyrolysis gas through a coke bed (4) to further remove tar from the pyrolysis gas. Furthermore, a two-stage gasifier (6) is disclosed.
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