中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

82 records (took 0.026 seconds)

    PROCESS FOR THE PURIFICATION OF FLUE GASES, AND AN APPARATUS FOR IT
    71.
    发明专利
    PROCESS FOR THE PURIFICATION OF FLUE GASES, AND AN APPARATUS FOR IT 未知

    公开(公告)号：CA2064210A1

    公开(公告)日：1991-01-20

    申请号：CA2064210

    申请日：1990-07-18

    Applicant: TAMPELLA OY AB

    Inventor： POKKI TUOMO ,  KENAKKALA TIMO ,  KOKKONEN KARI ,  ENWALD TARJA ,  HAMALA SIRPA

    IPC: B01D53/34 ,  B01D53/50

    Abstract: 2064210 9101174 PCTABS00003 The invention relates to a process for the purification of flue gases by feeding (7) limestone into the furnace (1) of a boiler, by separating (3) the dusts from the flue gases at a point after the furnace, by hydrogenating (14) the separated dust, which contains calcium oxide, by returning (12, 13) it to the flue-gas flow (11) at a point after the separation point but before the reaction zone (4), in which additional water or vapor is fed (15) into the dust-bearing flue gas, whereafter the dust which contains sulfated calcium hydroxide is separated (5) from the flue gases (6) thus purified. According to the invention, the hot, dust-bearing flue gas coming from the furnace is divided in the separation zone (3) into a dust-poor main flow (11) and a dust-rich secondary flow (12), vapor or water mist (14) being fed into the secondary flow at a point at which the temperature of the secondary flow is 300-600 ·C. The invention also relates to an apparatus, such as a cyclone, intended for use in this process and having nozzles (19) for feeding in steam or for atomizing water, and a connecting duct (12) between the separation device (3) and the flue-gas duct (11) for the purpose of making the activated dust-rich secondaryflow of flue gas to join the dust-poor main flow at a point after the cyclone (3).

    PROCESS FOR PRODUCING CEMENT OR CONCRETE
    73.
    发明专利
    PROCESS FOR PRODUCING CEMENT OR CONCRETE 未知

    公开(公告)号：HU901577D0

    公开(公告)日：1990-06-28

    申请号：HU157790

    申请日：1990-03-14

    Applicant: TAMPELLA OY AB

    Inventor： AHONEN HEIKKI ,  KENAKKALA TIMO ,  KOKKONEN PERTTI

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

    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.

    74.
    发明专利
    未知

    公开(公告)号：FR2580951B1

    公开(公告)日：1990-05-11

    申请号：FR8516282

    申请日：1985-11-04

    Applicant: TAMPELLA OY AB

    Inventor： HAMALA SIRPA ,  KENAKKALA TIMO ,  JANKA PENTTI ,  RUOHOLA TUOMO ,  LEHTIMAKI MARTTI

    IPC: B01D53/14 ,  B01D53/50 ,  B01D53/75 ,  B01D53/81 ,  C01B17/60 ,  C01F11/46 ,  C01F11/48 ,  B01D53/34 ,  C01B17/48

    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.

    PROCESS FOR THE REMOVAL OF SULFUR DIOXIDE FROM HOT FLUE GASES
    75.
    发明专利
    PROCESS FOR THE REMOVAL OF SULFUR DIOXIDE FROM HOT FLUE GASES 未知

    公开(公告)号：CA2001235A1

    公开(公告)日：1990-04-30

    申请号：CA2001235

    申请日：1989-10-23

    Applicant: TAMPELLA OY AB

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

    IPC: B01D53/50 ,  B01D53/14 ,  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') 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.

    METHOD FOR EXTRACTION SULFUR DIOXIDE FROM HOT EXHAUST GASES
    76.
    发明专利
    METHOD FOR EXTRACTION SULFUR DIOXIDE FROM HOT EXHAUST GASES 未知

    公开(公告)号：HU895606D0

    公开(公告)日：1990-01-28

    申请号：HU560689

    申请日：1989-10-30

    Applicant: TAMPELLA OY AB

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

    IPC: B01D53/50

    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.

    79.
    发明专利
    未知

    公开(公告)号：FI891284A0

    公开(公告)日：1989-03-17

    申请号：FI891284

    申请日：1989-03-17

    Applicant: TAMPELLA OY AB

    Inventor： AHONEN HEIKKI ,  KENAKKALA TIMO ,  KOKKONEN PERTTI

    IPC: C04B7/26 ,  B01D53/50 ,  C04B18/06 ,  C04B18/08 ,  C04B

    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.

Patent Agency Ranking