Purifying waste gas from fertiliser production

    公开(公告)号:GB2315434A

    公开(公告)日:1998-02-04

    申请号:GB9715375

    申请日:1997-07-22

    Applicant: BASF AG

    Abstract: In a process and an apparatus for the joint purification in a wash column (VII) by means of a washing liquid (5) of the waste gases (1,3) and/or vapors (2) formed in the production of inorganic fertilizers, the waste gases and/or vapors are supplied to the wash column in at least two separate streams (1-3). One of the streams is a collective waste gas stream which contains the waste gases and/or vapors with a high water content and high proportion of ammonia. The other stream is a collective waste gas stream with a low water content and low content of ammonia. Apparatus for the purification is typically a filled column with at least two supply lines for waste gas/vapours connected to separate gas distributors in the wash column.

    Wash tower for purification of inorganic fertiliser waste gases

    公开(公告)号:DE19731504A1

    公开(公告)日:1998-01-29

    申请号:DE19731504

    申请日:1997-07-22

    Applicant: BASF AG

    Abstract: Joint purification in a wash column using a washing liquid of waste gases and/or vapours formed in the production of inorganic fertilisers comprises supplying the waste gases and/or vapours to the wash column in at least two separate streams. One of the gas streams is preferably a collective waste gas stream containing the waste gases and/or vapours having a high water content and a high proportion of ammonia (NH3) and where another of the streams is a collective waste gas stream from granulation and drying having a low water content and a low content of ammonia (NH3). The separate streams are distributed using individual distributor systems under fittings in the wash column, the granulation and drying gas stream being distributed above the first stream in the wash column. The wash column (VII) is filled with filling or packing materials (VIIA) and 2 or more separate collective waste gases supply lines connected to separate distributors (IX, X) below the filling in the wash column.

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