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公开(公告)号：US12128393B2
公开(公告)日：2024-10-29
申请号：US17441358
申请日：2019-11-19
摘要： Provided are a denitration catalyst regeneration method and a denitration catalyst regeneration system, which are capable of recovering denitration performance to a high level and reducing the SO2 oxidation rate of a catalyst. A denitration catalyst regeneration method according to the present invention includes: a chemical solution cleaning step for immersing a denitration catalyst in a chemical solution containing a fluorine compound and an inorganic acid; a step for extracting the denitration catalyst from the chemical solution; and a finish washing step for washing the denitration catalyst extracted from the chemical solution with a finish cleaning solution containing an organic acid.
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公开(公告)号：US20220152603A1
公开(公告)日：2022-05-19
申请号：US17441358
申请日：2019-11-19
摘要： Provided are a denitration catalyst regeneration method and a denitration catalyst regeneration system, which are capable of recovering denitration performance to a high level and reducing the SO2 oxidation rate of a catalyst. A denitration catalyst regeneration method according to the present invention includes: a chemical solution cleaning step for immersing a denitration catalyst in a chemical solution containing a fluorine compound and an inorganic acid; a step for extracting the denitration catalyst from the chemical solution; and a finish washing step for washing the denitration catalyst extracted from the chemical solution with a finish cleaning solution containing an organic acid.
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公开(公告)号：US11045799B2
公开(公告)日：2021-06-29
申请号：US15740554
申请日：2016-07-07
发明人： Tomotsugu Masuda , Masanao Yonemura , Masanori Demoto , Kazuhiro Iwamoto , Toshinobu Yasutake , Makoto Yokoyama
IPC分类号： B01J38/60 , B01J23/30 , B01J23/92 , C11D3/04 , B01D53/86 , B01J21/06 , B01D53/96 , C11D7/08 , C11D7/10
摘要： Provided are: a cleaning agent for a denitration catalyst; and a denitration catalyst regeneration method and a denitration catalyst regeneration system which make it possible to efficiently remove matter adhering to a surface of a catalyst and to greatly restore catalytic performance. The regeneration method includes: a prewashing step (S12) of washing a denitration catalyst with water; a liquid agent cleaning step (S14) of immersing the denitration catalyst washed with water in a liquid agent containing an inorganic acid and a fluorine compound; a step of recovering the denitration catalyst from the liquid agent; and a finish washing step (S16) of washing the denitration catalyst recovered from the liquid agent with a finish cleaning liquid which is water or sulfamic acid-containing water.
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