| |
The D-type water tube boilers
represent one of the most popular boiler
configurations for water tube boilers and
this design is offered by a lot of
industrial boiler manufacturers around the
world.
The D-type models will very in capacities
from 10,000 Lbr/hr (4.5tons/hr) to 225,000
Lbr/hr (102 tons/hr) with design pressure
from 14 bars to 103 bars.
Convective type super heaters
are possible with temperatures up to 400 oC.
It is a good design to fire
no.6 oil, no.2 oil or gas. |
 |
| |
Right hand and left hand
models are available. For Higher pressures
than 700psig (48bars) it is preferable to
use an A-type or an O-type boiler.
Typical clients will be pulp and paper
industries, petrochemical industries, large institutional clients
etc.. This type of boiler is often specified
by consulting engineers although it is not
symmetrical and well balanced as an A-type
or an O-type boiler but it is an old design
which has proven itself as being reliable.
There are thousands of them in operation
around the world mostly for saturated steam
and capacities below 100,000lbs/hr
(45tons/hr).
The D-type boilers can be
built using tangent tube water walls or
membrane type waterfalls-type boilers can
not be operated at pressure bellow 75psig
(5bar) compare to Aqua tube boilers and can
not be used or are not recommended as hot
water heaters. Thermal fluid heating is not
possible. Small sizes are very expensive
compare to the Aqua tube boiler series.
|
Specifications |
|
Capacities |
From 10,000 to
225,000 lbs right or left hand
models are available. |
|
Pressures |
200 to 1500 psig. |
|
Super heaters |
Available upon
request |
|
Fuels |
Oil, gas or
combination |
-Membrane or tangent
tube wall construction to ASME code
section I
-Optional water cooled membrane rear
wall
-Optional water cooled membrane
front wall and burner throat
-Steam purity up to 1ppm |
|
