boiler. Overview of boiler

Discussion in 'Boiler Forum' started by boilerdonganhhn, May 1, 2014.

  1. boilerdonganhhn

    boilerdonganhhn New Member

    Apr 14, 2014
    Ha noi
    A boiler is a closed vessel in which water under pressure is transformed into steam by the application of heat. In the boiler furnace, the chemical energy in the fuel is converted into heat, and it is the function of the boiler to transfer this heat to the contained water in the most efficient manner. The boiler should also be designed to generate high quality steam for plant use. A flow diagram for a typical boiler plant is presented in Figure 12.l.

    A boiler must be designed to absorb the maximum amount of heat released in the process of combustion. This heat is transferred to the boiler water through radiation, conduction and convection. The relative percentage of each is dependent upon the type of boiler, the designed heat transfer surface and the fuels.

    Fabrication standard:

    - Boiler body is fabricated by Dong Anh Pressure equipment Joint stock company according standard ASME - Section VIII Division 1, TCVN 7704:2007; 8366:2010.
    - Hot rolled steel plate according America’s standard ASTM, steel marking:A515/ Q245R.
    - Boiler tubes according standard ASTM A106Gr.B; GB 3087-2008 (professional standard for boiler tubes).
    - Fabrication feature, fabricating material

    + Upper and lower drum are fabricated by hot roiled steel plate A515/Q245R which are imported from Korea – China.
    + Drums are fabricated on the modern machines such as rolling machine, automatic welding machine… Manholes is designed resonate, mechanical hygiene, repair easily. + Steam generating tubes: are fabricated by boiler seamless steel tube according ASTM -106 Gr “B”; GB 3087-2008.
    + Technical standard: Flanges: - 10K / 20K - JIS B2220
    Valves : 10K / 20K - JIS
    + Platform and ladder are fabricated by iron, steady, convenient for operation.
    - In the processing, the engineers need to supervise about pressure equipments safety.


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