Invention Grant
US07682425B2 Method for removing ammonia and dust from a waste gas that results during the production of fertilizers 有权
在化肥生产过程中从废气中除去氨和灰尘的方法

  • Patent Title: Method for removing ammonia and dust from a waste gas that results during the production of fertilizers
  • Patent Title (中): 在化肥生产过程中从废气中除去氨和灰尘的方法
  • Application No.: US10574091
    Application Date: 2004-09-04
  • Publication No.: US07682425B2
    Publication Date: 2010-03-23
  • Inventor: Paul NiehuesHarald Franzrahe
  • Applicant: Paul NiehuesHarald Franzrahe
  • Applicant Address: DE Dortmund
  • Assignee: Uhde GmbH
  • Current Assignee: Uhde GmbH
  • Current Assignee Address: DE Dortmund
  • Agency: Collard & Roe, P.C.
  • Priority: DE10346519 20031002
  • International Application: PCT/EP2004/009886 WO 20040904
  • International Announcement: WO2005/032696 WO 20050414
  • Main IPC: B01D53/14
  • IPC: B01D53/14
Method for removing ammonia and dust from a waste gas that results during the production of fertilizers
Abstract:
The invention relates to a method for removing ammonia and dust from a waste gas that occurs during the production of fertilizers, preferably urea, in which method the waste gas is introduced into a first washer, and a cooling gas is introduced into the one washer and an aqueous solution is introduced into the other washer, whereby both the waste gas and the cooling gas pass through at least one mist collector before exiting from the washer, in each instance, is supposed to be developed further in such a manner that the waste gas pollution can be clearly reduced. This is accomplished in that the additional water is first introduced into a fine-washing area of the first washer, delimited by the mist collector on the top and by a liquid-impermeable partition bottom at the bottom, and sprayed onto the at least one mist collector, and the aqueous solution that forms in the fine-washing area is subsequently passed into the second washer.
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