“Krasny Kotelshchik” Took Part in Equipping Heat Recovery Steam Generator of Sredneuralskaya GRES

Taganrog Boiler-Making Works “Krasny Kotelshchik” (TKZ) performed the replacement upon expiry of life of the second stage preheater. This equipment is a part of the Heat Recovery Steam Generator of Power Unit ПГУ-419 of Sredneuralskaya GRES (branch of PJSC «Enel Russia»).

TKZ’s scope of obligations included design, manufacture, supply and erection supervision of HRSG second stage preheater. The Project was executed in strict accordance with the Customer requirements. In particular, technical documentation developed by TKZ specialists was agreed with the Plant during the stage of engineering.

During the Project implementation the three-dimensional simulation system NX, which is designed for the development of complex products comprising a big number of elements, was used. Creating the preheater 3D-model allowed for developing a set of detailed engineering documentation in a quick and qualitative way for putting into production.

The preheater was designed taking into account the existing main gas duct and HRSG adjacent heating surfaces. It was manufactured of three pre-fabricated assemblies with the length of more than 20 meters and weight of approximately 30 tons each. The advantages of such solution are minimization of the erection works and equipment putting into operation time period reduction.

At this moment the second stage preheater is installed into the design position. After installation and successful hydraulic tests of this equipment Sredneuralskaya GRES HRSG resumed its operation. Quick replacement of the heating surface, which had reached the end of its service life, allowed for regaining the design parameters of the steam generator operation.