Rust Proof Boiler Superheater Coil Steam Heat Exchange Spare Parts
For Power Plant
Superheater is a part of a boiler that heats the steam from the
saturation temperature to the overheating temperature. It is also
called a steam superheater.Superheater can be divided into
convective type, radial type and semi-radial type according to heat
transfer mode;According to the characteristics of the structure, it
can be divided into serpentine pipe type, screen type, wall type
and wall type.They are made up of parallel pipes and inlet and
outlet manifold.
Superheaters in large capacity boilers are of both convective and
radiant type.
The convective type superheaters are placed in the second pass of
the boiler, and these are also called low temperature super
heaters. Generally about a 40 to 60 degree centigrade temperature
pick up takes place on the steam side in this superheater.
The steam from this moves to a radiant type superheater called the
panel or platen superheater, and about a 70 to 100 degree
centigrade pickup take place there.
This is followed by the final superheater, and the remaining
required temperature is picked up here. One has to understand that
the designer can vary the pickup pattern depending upon his way of
practice or requirement.
But in all the methods adopted, the final temperature must be
within a narrow range generally plus / minus five degrees
centigrade. The superheaters are so surfaced that, for the design
fuel of the boiler, there will not be any desuperheating
requirement.
Functions and characteristics of superheaters and reheaters
functions of superheaters and reheaters:
Superheaters and reheaters are important parts for the heating
surfaces, used to increase steam temperature, aiming to improve
steam enthalpy and further to increase the thermal circulation
efficiency for power station.
Superheaters work to heat surnatured steam to superheated steam
with a certain tempetature. When boiler loads or other working
conditions change, it is necessary to make sure superheated steam
temperature to be normal, and within allowable range of temperature
variation.
From the thermal circulation in power station, the original
parameters of pressure and temperature is higher, the thermal
efficiency of circulation is better, or the steam humidity of the
steam turbine rear is too high, influencing its safety. While the
superheaer steam temperature is limited by metal materials, at
present, due to limitation of metal materials, superheated
temperature for most power station boilers are still within the
range of 540-555 dgrees, and to avoid the steam humidity of blade
of steam turbine rear too big, thus middle reheating system is
applied.
What are the differences of Superheater And Reheater?
| Type | Advantages | Disadvantages | Supporting method |
| Pendant-type | 1.Firm structural support | 1. Flow blockage by condensed steam 2. Needs a slow restart to
purge the water that accumulates in the bottom. | supported from above |
| Inverted-type | 1.Proper drainage of the condensed steam | 1. Lack the structural rigidity, especially in high speed gas flow | Supported from below |
| Horizontal -type | 1. Proper drainage 2. Good structural rigidity. | 1. They do not view the flam directly so they are mainly from the
convective type | Usually supported in the vertical gas ducts parallel to the main
furnace.
|
Details
| Setting Information |
| process | welding |
| structure | horizontal or vertical |
| material | carbon steel, alloy steel |
| tubes | φ32, 38, 42, etc. |
| size | customized |
| brand | HTEG |
| Warranty | 18 months
|
Design structure
1. heating saturated steam, temperature up to 900 degree C.
2. high efficiency, >90%.
3. high speed heating.
4. design with stainless steel.
5. long design service life, 15 years.
Send us required technical data, such as steam capacity, presure,
required temperature etc. We will design accordingly.
HD Boiler offers a best in class facility
For over 30years, Hua Dong Boiler has been consistently innovating
and improving our boiler superheaters and reheaters.The
improvements in bending,welding and design ensure our products meet
both Euorpean and American standards, ensuring a relabile
performance.
