Skip to main content

Double evaporation boilers

  • A double evaporation boiler uses two independent systems for steam generation and therefore avoids any contamination between the primary and secondary feedwater.
  • The primary circuit is in effect a conventional watertube boiler which provides steam to the heating coils of a steam-to-steam generator, which is the secondary system.
  • The main reason for the adoption of this design of boilers is to allow use of modern high efficiency watertube boilers witghout fear of damage through contamination by cargo or fuel oils.The basic design consists of a D-Type boiler design upon which is mounted a Steam/Steam generator drum.
  • The steam generated by the main boiler heats water in the Steam/Steam generator which produces steam requirements.
  • The primary drum is initially filled with high quality feed water and suitably dosed.
  • The  main  reasonfor  the  adoption  of  double  evaporation  boilers  in  tankers are  concerned  of  damage  caused  by  oil  and  sulphur  which  enters  the  feed  systems  through  leaky  steam  heating  coils  used  for  heating  the  oil  in  cargo  tanks.

Labels:

Comments

  1. Akaa Plumbing and HeatingMarch 30, 2021 at 1:53 AM

    It is really a helpful blog to find some different source to add my knowledge.
    Boiler Repair Watford

    ReplyDelete
  2. WesleybrysonNovember 29, 2021 at 12:42 AM

    Mesmerized article written on this blog with other relevant information. It is straight to the point that how we can improve our skills as well as how we can be represented to a new stream of professionalism.boiler repair

    ReplyDelete
  3. AnonymousMay 31, 2022 at 1:15 AM

    sir please upload marine boilers notes

    ReplyDelete
  4. WilliamsandersonJune 29, 2022 at 12:00 AM

    Boiler Repairs

    Assert Heating Services is one of the best Heating Engineers in London offering a full range of heating system Installations as well as gas and modern plumbing services.

    ReplyDelete
  5. WilliamsandersonJuly 4, 2022 at 3:45 AM

    Boiler Servicing

    Assert Heating Services is one of the best Heating Engineers in London offering a full range of heating system Installations as well as gas and modern plumbing services.

    ReplyDelete
  6. Heating ServiceJuly 5, 2022 at 9:37 AM

    Such a amazing and informative blog.
    Thanks for sharing this blog on double evaporation boilers.
    I have a confusion regarding new boiler installation Glasgow, that how much landlords or property owner have the permission to use the boiler in a single apartment.

    ReplyDelete

Post a Comment

If you have any doubts.Please let me know

Popular posts from this blog

Main engine interlocks

Interlocks are provided so that the engine can be started or reversed only when certain conditions have been fulfilled. When there is a remote control of engines, it is essential to have interlocks. This reduces the possibility of engine damage and any hazards to the operating personnel. Turning gear Interlock . This device prevents the engine from being started if the Turning gear is engaged. Running Direction Interlock . This prevents the fuel from being supplied if the running direction of the engine does not match the Telegraph. Starting Air Distributor in end position . This prevents starting from taking place if the shifting of the Distributor has not been completed. Main Lube. oil pressure, Piston cooling pressure, Jacket water pressure, and important parameters must be above the required minimum. Auxiliary Blower Interlock . The Auxiliary Blower is provided in case of Constant pressure turbo charging. Air Spring pressure Interlock . In case of the present generation...
7 comments
Read more

Differences between MC/MC-C and ME/ME-C engines

The electrohydraulic control mechanisms of the ME engine replace the following components of the conventional MC engine: Chain drive for camshaft Camshaft with fuel cams, exhaust cams and indicator cams Fuel pump actuating gear, including roller guides and reversing mechanism Conventional fuel pressure booster and VIT system Exhaust valve actuating gear and roller guides Engine driven starting air distributor Electronic governor with actuator Regulating shaft Engine side control console Mechanical cylinder lubricators. The Engine Control System of the ME engine comprises: Control units Hydraulic power supply unit Hydraulic cylinder units, including: Electronically controlled fuel injection, and Electronically controlled exhaust valve activation Electronically controlled starting air valves Electronically controlled auxiliary blowers Integrated electronic governor functions Tacho system Electronically controlled Alpha lubricators
9 comments
Read more

Why is a man hole door elliptical in shape?

Any opening in a pressure vessel is kept to a minimum and for a man entry an elliptical hole  is lesser in size than the corresponding circular hole. More over it is prime concern to have a  smoothed generous radius at the corners to eliminate stress concentration. Hence other  geometrical shapes like rectangle and square are ruled out.  To compensate for the loss of material in the shell due to opening, a doubler ring has to be  provided around the opening. The thickness of the ring depends on the axis length along the  dirrection in which the stresses are maximum and the thickness of the shell. It is important to  align the minor axis along the length of the vessel, as the stress in this direction is  maximum. Longitudinal stress: Pd/2t where P= pressure inside the vessel, d= diameter of the arc, t=  thickness of the shell plating  Circumferential stress: Pd/4t  More over a considerable material and weight saving is achieved as...
20 comments
Read more