ASME Standard Coal Fired Steam Boiler for Power Station

Specifications

    ASME standard coal fired steam boiler for power station

I.Boiler parameter:

Rated evaporation capacity                        75t/h

Rated steam pressure                              5.29MPa

Rated steam temperature                          450°C

Feed-water temperature                           105°C

Exhaust gas temperature                          ~ 155°C

Boiler design efficiency                            ~ 90%

II. Design fuel

Coal type: coal fuel, as received basis net calorific power is above 12.6MJ/Kg.

Granularity requirement: particle size 0-13mm

Limestone granularity requirement: particle size 0-2mm

III.Boiler advantages:

1.Adopt film-type water-cooling wall to intergrate the hearth,separator and materials returning system together,which can save space and it has compact structre.

2.Anti-brasive design for buried pipeline and hearth.

3.Applicable for various coal types.

4.Low failure rate an long time running.

5.Low temperature combustion technology to reduce harmful gas emission.

IV.Features of CFB boiler

1.    Boiler furnace(combustion chamber)

All of the boiler furnaces adopt membrane type water cooled wall and suspension structure.

The lower part of furnace is breeches-leg structure, which include two wind chambers and two air distribution plates.

And the lower part of combustion chamber is lined with anti-corrosive fireproof materials, which in the cone part can prevent the high temperature corrosion.

 2.    Separator

Four high temperature adiabatic separator, made of carbon steel plate, lined with anti-corrosive fireproof materials, the upper part of separator is cylindrical section( for material separation),the lower part is cone section(capture the participles and deliver back to return valve)

In order to increase the efficiency of separator, and reduce the corrosive rate for central cylinder, it adopts eccentric layout, the flue gas purified by separator enter into the tail convection pass.

3.    Return valve

Four return valves are allocated below four separators, the valves are made of carbon steel plates and lined with anti-corrosive fireproof materials.

The circulated materials are fluidized by the high pressure wind through wind distribution plate of valves.

Generator rotor