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    31.
    发明专利
    未知

    公开(公告)号：DK515585D0

    公开(公告)日：1985-11-08

    申请号：DK515585

    申请日：1985-11-08

    Applicant: TAMPELLA OY AB

    Inventor： HAEMAELAE SIRPA ,  KENAKKALA TIMO ,  JANKA PENTTI ,  RUOHOLA TUOMO ,  LEHTIMAEKI MARTTI

    IPC: B01D53/14 ,  B01D53/50 ,  B01D53/75 ,  B01D53/81 ,  C01B17/60 ,  C01F11/46 ,  C01F11/48 ,  B01D ,  C01B

    Abstract: The invention relates to a process and apparatus for causing the sulfur dioxide of flue gases to react to form solid sulfates and sulfites which can be separated from the flue gases. Sulfur dioxide containing flue gases (16) are directed according to the invention into one end of an oblong reaction zone (4), in addition to which pulverous calcium compounds and water are directed separately into the reaction zone at several points, and finally from the opposite end a flue gas suspension is withdrawn and directed to dust separation (5). By feeding the pulverous reagent and the water separately into the reactor 4, the problems involved in the preparing, handling and spraying of an aqueous slurry are avoided, in addition to which the retention time and the reaction conditions can be regulated easily in the oblong reactor 4.

    32.
    发明专利
    未知

    公开(公告)号：IT1239736B

    公开(公告)日：1993-11-15

    申请号：IT1966190

    申请日：1990-03-13

    Applicant: TAMPELLA OY AB

    Inventor： AHONEN HEIKKI ,  KENAKKALA TIMO ,  KOKKONEN PERTTI

    IPC: C04B7/26 ,  B01D53/50 ,  C04B18/06 ,  C04B18/08 ,  B28C

    Abstract: A method of producing cement or concrete, comprising the step of adding fly ash to the cement or concrete at the production stage, the fly ash containing lime and reaction products from the reaction occurring between lime and sulphur oxides in connection with the desulphuration of flue gases. To avoid the disadvantageous effects of calcium sulphite and entringite reactions and to increase the used amount of fly ash containing desulphuration waste, the calcium sulphite is oxidized by hydrogen peroxide either before the production of cement or concrete or during the production.

    40.
    发明专利
    未知

    公开(公告)号：FI80616B

    公开(公告)日：1990-03-30

    申请号：FI885003

    申请日：1988-10-31

    Applicant: TAMPELLA OY AB

    Inventor： KOKKONEN KARI ,  TUOMINIEMI SEPPO ,  ALPPI HANNU ,  KENAKKALA TIMO

    IPC: B01D53/50 ,  B01D53/34

    Abstract: The invention relates to a process for the removal of sulfur dioxide from hot flue gases (8) which have been obtained by burning a sulfur-containing substance (4) in a boiler (1). In the process, a substance (6), such as lime or limestone, which reacts with sulfur dioxide to form a solid product is fed into the boiler or into the reaction zone (2) subsequent to the boiler, the hot flue gases (8) are cooled in the reaction zone (2) by feeding into it at maximum such an amount of water as the hot flue gases are capable of evaporating, and the substantially dry solid products are separated (3) in the form of dust (10) from the cooled flue gases. According to the invention, the flue gases (11) thus obtained are scrubbed (13) with an alkaline aqueous solution (15) in order to remove the remaining sulfur dioxide and dust from the flue gases, and part (9 min ) of the cycled scrubbing solution (9) is fed into the boiler (1) or the reaction zone (2) in order to evaporate the water from this solution.

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