I Pressure part of the boiler In the scope of replacement and modernization of the pressure part of the boiler, the Contract Party performed the design, manufacture, delivery and installation of the following boiler elements: Screen membrane boiler panels – 7×6.3 pipes, material 16 Mo3; Screened tubular arches around: coal dust burner, OFA exhaust nozzles, water pipe ends 57×6.3, material 16 Mo3; Bottom screen evaporator chambers – tubes 273×40, material 16Mo3, Fresh steam superheater – 44.5×7,1 tube material 10 CrMo910; Screen membrane panels of the wall superheater in the convection part of the boiler – 57×5 pipes, material 13CeMo45; Secondary steam superheater – tube 51 x 3.5 material 13CrMo45; Wall warmer for fresh steam: 51 x 4 pipe, material 13CrMo45; Convection fresh steam superheater – tube 38×3.6 material 16 Mo3; Boiler steam pipeline of fresh steam made of pipes: 32.9 x 30 material 10 CrMo910; 355,6 x 45 10CrMo910 material; 10) Boiler steam pipe of superheated steam expressed from pipes: – 508 x 20 material 10 CrMo910; – 508 x 20 material P265GH; II. Boiler heating system As part of the modernization of the heating system into the low-NOx emission system, design, manufacture, delivery and installation of the following boiler equipment: Coal dust burners. OFA outlet terminals for two levels of bearing chamber Hot air ducts with regulating elements (primary, secondary and OFA air for heating). Oil bearing burners (4 pcs.) With oil installation around the boiler. External bearing oil installations for storage and boiler feed of the bearing oil installation. Reconstruction of the suction part sealing and restoration of the suspension and covers repair of vrelog (boiling) gas piping for all boiler mills. Replacement of the steel plating and sealing of the carbon storage tank. III. Other boiler accessories and auxiliary equipment Design, execution, delivery and installation of the following boiler accessories. Water injectors system (water tips) for cleaning pipe walls of bearing chambers made of sludge with slave monitoring during boiler operation. A system of long-running steam fans for cleaning superheaters from sludge mud during boiler operation Flame monitoring in the bearing chamber Partial replacement of the thermal insulation layer of the boiler. Accessories and chemical cleaning service for boiler evaporator Boiler blowdown equipment and service
