ASME Standard Steel Seamless Steel Superheater for CFB Boiler

Boiler Superheater’s Manufacturing

Our superheaters are manufactured according to the ASME Regulations. HDB manufactures both coil type and shell type superheaters depending upon the type of boiler and boiler capacity.

Coil type superheaters design generally consists of 180o coils welded through the headers on both the sides. In a coil type designs steam is inside the coil and flue gases are outside the coil.

Shell type superheaters design generally used to superheat the steam electrically using special heating elements stacked in a shell and the steam flows over the heating elements.

Designing Parameters of Industrial Superheaters

-Boiler pressure
-Steam pressure
-Temperature requirement in the process

Superheater Arrangement, specification and material:

Arrnagement and specification:

The boiler has high and low superheaters, the HS is arranged in the flue gas duct after cyclone separators, and the LS is arranged in back-end vertical shaft. The saturated steam is introduced into the ceiling enclosure headers by eight φ108×5 saturated steam connecting tubes on the drum, and then into the lower temperature superheater through φ 42×4.0 tubes, after being heated by LS, goes into desuperheater for adjusting temperature, and then goes into HS through eight tubes of φ108×5, and sent to steam turbine through main steam valve after going into SH outlet header.

The LT superheater adopts contranatant arrangement and the HT superheater is downstream arrangement. The collection and distribution of steam adopts the way of width direction to improve non-uniformity of steam flowing and prevent local coils superheated due to steam deflection.

Material:
To ensure safety operation, the LT superheater uses SA210 Gr.A1 seamless steel tubes, and the HT superheater uses low-alloyed SA213 T22 seamless steel tubes.

Thechnical parameters: