Zhangjiagang HuaDong Boiler Co., Ltd. |
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ASME Standard Steel Seamless Steel Superheater for CFB Boiler
The Steam Superheater is a coil type heat exchanger which is used to produce superheated steam or to convert the wet steam to dry steam, generated by a boiler.
It is different from a boiler in a way that, boiler utilizes both sensible heat as well as latent heat to convert water into steam while superheater utilizes only sensible heat to superheat the steam in order to increase its enthalpy.
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:
Material | carbon steel, alloy steel , or durable heat steel |
Tube OD | 10-114mm |
Tube W.T. | 0.8mm- 15mm |
Structure | vertical or horizontal |
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