Delivery and erection of large-size structures as part of the construction of a selective catalytic reduction (SCR) plant

Grupa WOLFF

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Delivery and erection of large-size structures as part of the construction of a selective catalytic reduction (SCR) plant

Scope of work:

  • Erection of large-size structures in the power plant area (flue gas ducts from two power units to a new flue gas desulphurisation plant) together with internal measuring devices and compensators
  • Installation of bypass channels and cold air ducts

Requirements:

  • Experience in erection of large-size structures
  • Adaptation of the size of structural elements to the requirements of transport to the construction site and subsequent installation
  • Execution of works at the operating facility and in a limited installation space

Benefits for the investor:

  • Comprehensive execution of assembly works without disturbing the operation of the power plant, in compliance with strict health and safety standards

Check out the details of the installed equipment and services provided:

The task consisted in comprehensive execution of erection works for the project related to ensuring more than five times reduction of nitrogen oxide emissions from the current level of 500-550 mg/Nm³ to the level below 100 mg/Nm³ NOx.

The capital investment project concerned the construction of a flue gas denitrification plant (selective catalytic reduction, SCR) together with the modernization of flue gas fans for two power units with a capacity of 500 MW each. In addition, the design and replacement of the electrostatic precipitator, including the ash removal system and the associated flue gas ducts, as well as the modernisation of the flue gas desulphurisation (FGD) plant for one of the units were also carried out.

All-embracing erection of large-size structures

The task of the WOLFF Group was to erect large-size structures (flue gas ducts from two power units to a new flue gas desulphurisation plant). Due to the specificity of the facility, the size of the elements has been adapted to the requirements of transport to the construction site and installation on the structure.

Installation elements of flue gas ducts consisted of walls (both vertical and horizontal), braces and additional elements provided for technological reasons (i.e. measuring nozzles, flanges for compensators). Internal measuring devices, manhole covers and compensators were installed in the ducts. In addition, WOLFF Group was responsible for the installation of bypass channels and cold air ducts on one of the units.

The total weight of the installed bypass channels is approx. 63 tons and that of cold air ducts – approx. 207 tons.

Execution of assembly works without disturbing the operation of the power plant

The task was a challenge for our installation teams due to the necessity to work on an operating facility, in a limited installation space, and above all, to work on large-size elements requiring the use of specialized equipment, tower cranes and rope access methods.

Our teams’ many years of experience in installation on industrial sites, especially in hard-to-reach areas or areas with limited space, have contributed to the smooth running of the work.

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Grupa WOLFF

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