Chapter 11

Steam Generator Initial Firing and Drying Out of Insulation


Insulation and refractory are applied to the steam generator (SG) enclosure to restrict heat loss to the surrounding area. Type of insulation materials may be granular, fibrous, cellular, and reflective. In membrane-wall construction, only insulation is provided. Nonmembrane walls require both insulation and refractory. Before going into first start-up of SGs, it is essential to dry out insulating and refractory materials. SGs must be fired within 3–4 weeks from carrying out chemical cleaning. Initial firing is conducted at a very slow rate. Purging of the furnace is essential to remove combustible matters prior to firing. During the initial firing of SGs, combined ...

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