Result:
The operation of the steam boiler with a steam capacity of up to 80 t/h has been restored and a stable steam supply to the turbine has been ensured. The equipment was commissioned from the first launch without additional modifications.
Overhaul of a steam boiler with a steam capacity of up to 80 t/h with the restoration of the steam supply system to the turbine
Key Features:
- works were performed at an operating metallurgical enterprise;
- comprehensive repair of the main and auxiliary boiler equipment;
- restoration of critical units of the draught-blowing complex (exhausters and blowing mechanisms);
- revision and cleaning of gas ducts;
- development of individual bearing drawings for the customer's equipment;
- high-precision processing: scraping and manual lapping of bearings;
- restoration of thermal circuits: lining and thermal insulation;
- achieving stable equipment operation from the first launch.
Implementation:
- dismantling, fabrication, and installation:
- water economizer (replacement of bundles without replacing headers);
- steam superheater;
- ceiling tubes.
- overhaul of draught-blowing mechanisms (total equipment weight ~50 t):
- revision of exhausters;
- rebabbitting of sliding bearings (B83 babbitt);
- scraping of bearing surfaces.
- fabrication of oil pockets with the formation of an oil wedge for a Ø150 mm shaft;
- revision and cleaning of gas ducts;
- restoration of boiler lining;
- restoration of thermal insulation of pipelines and technological equipment;
- large-unit assembly of equipment;
- manual high-precision lapping of bearing units;
- replacement of shut-off valves;
- commissioning works.
