Sökning: "loop seal"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden loop seal.

  1. 1. Solids Flow Pattern in Circulating Fluidized-bed Boilers

    Författare :Andreas Johansson; Chalmers University of Technology; []
    Nyckelord :scale-up; hydrodynamics; combustion; loop seal; wall-layers; Circulating Fluidized Bed;

    Sammanfattning : The background of this dissertation is the knowledge of circulating fluidized bed (CFB)technology, which has reached a level enabling units of several hundred megawatts ofelectricity to be constructed and employed. Yet an improved understanding of the technologyis needed in order to further develop and optimize large-scale combustion in CFB boilers,especially since the operating conditions and the geometries of large boilers differ from thosetypical for laboratory units, in which most of the research hitherto has been performed. LÄS MER

  2. 2. High Temperature Corrosion in Fluidised Bed Environment

    Författare :Anna Nafari; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFB; coatings; Ni and iron based alloys; HCl; SO2; loop seal; High temperature corrosion; erosion corrosion test rig; surface characterization and temperature gradient;

    Sammanfattning : Successful material selection for power plants is the result of understanding the environment in each boiler. The boiler environment is affected by fuel chemistry, co-firing, process control and deposits as well as boiler type, design, size and load. LÄS MER

  3. 3. Fluid dynamics of circulating fluidized-bed boilers

    Författare :Andreas Johansson; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bottom bed; CFB boilers; wall-layer; fluid dynamics; large-scale circulating fluidized bed; loop seal;

    Sammanfattning : .... LÄS MER

  4. 4. Superheater corrosion in the loop seal of a wood fired CFB boiler

    Författare :Anna Nafari; Chalmers University of Technology; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 5. Investigation of Solids Distribution and External Solids Flux in a Circulating Fluidized Bed Boiler

    Författare :Elin Edvardsson; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; external solids flux; recirculation rate; solids distribution; CFB boiler; co-combustion;

    Sammanfattning : This work concentrates on two issues regarding combustion in circulating fluidized bed (CFB) boilers. Firstly, the impact of co-combustion of coal with sewage sludge on ash flows, bed material and gas concentrations in a CFB boiler is studied. LÄS MER