Thermal mechanical solutions.

To cover the calculated heat loads in the boiler room, it is planned to install three Bosch UT-M 52 hot water boilers with a thermal capacity of 12000 kW each. The installed capacity of the boiler house is 36 MW (30,96 Gcal/h). The main fuel is natural gas GOST 5542. Emergency fuel is not provided. The operating mode of the boiler house is automated, without the constant presence of maintenance personnel. The heating system is closed. The heat supply scheme is two-pipe. The thermal scheme of the boiler house is adopted as a single-circuit with direct connection to the network circuit. Coolant parameters 110-70 °C. Boilers operate with a constant temperature schedule, temperature control is carried out in the ITP of heat supply facilities according to the outside air temperature. Network pumps maintain a constant differential pressure in the heating network. Each boiler is equipped with a recirculation pump, which prevents the temperature of the coolant supplying the boiler from dropping below 60°C. Network pumps are selected taking into account redundancy according to the scheme 3 working + 1 standby. Wilo pumps IL 250/385-75/4 were adopted as network pumps of the heat supply system, with parameters H= 46,14 m.a.c., G= 297,65 m3/h. In the event of an emergency increase in pressure, each boiler is provided with the installation of 2 safety valves. Compensation for thermal expansion of water in the boiler circuit is provided by an electrically operated control valve that discharges excess water into the chemically treated water tanks. Boiler and network circuits are fed with chemically treated water. To bring the quality of make-up water in line with the requirements of technological consumers, an automatic water treatment system is provided in the boiler plant. In addition, auxiliary equipment is installed in the boiler room: water treatment equipment, mesh filters, butterfly valves, check valves, ball valves, air vents, instrumentation and A.

Constructive decisions.

The structural scheme of the building is frame-bonded with a metal frame. Columns and beams of the frame, half-timbered racks - welded, made of steel sheet. Fachwerk columns and racks - I-section, beams - I-section variable section with a slope of the upper belt of 12%. Technological platform - from metal structures: racks - from I-beam No. 20K1, beams - from I-beam No. 25B2 and channel No. 18, 18B2, coating - from steel sheet with lenticular corrugation 5 mm thick along the crate from channel No. 5. Stairs to the technological platform - metal, two-march. Suspended hoisting and transport equipment: electric rope hoists, mobile, carrying capacity: 1.0 t - 2 pcs., 2 t - 1 pc. Foundations - columnar, from monolithic reinforced concrete (concrete class B25, fittings class. AIII), sole size 2,40x2,70 m and 2,40x2,40 m for concrete preparation (concrete class B7,5) with a thickness of 100 mm and sand preparation with a thickness of 450 mm with layer-by-layer thrombization. Elevation of the base of the foundations -2,05 m (abs. elev. 129,45 m). The base of the base of the foundations is a sand cushion of medium-grained sand. Estimated soil resistance - 180 kN/m2, pressure - 164 kN/m2. Socle - ceramic brick 250 mm thick, insulation - "Penoplex-35" 50 mm thick, coated profiled sheet C 10. Heat transfer resistance Ro=1,70 m2oS/W. The outer walls are made of sandwich panels with mineral wool insulation 100 mm thick. Heat transfer resistance Ro=2,02 m2oS/W. Partitions - frame according to the KNAUF system, element-by-element assembly of plasterboard sheets filled with mineral wool boards. Covering - from roofing sandwich panels with mineral wool insulation 100 mm thick along galvanized purlins of Z-shaped profile 280x80x2. Heat transfer resistance Ro=2,68 m2oS/W. The chimney is three-barreled: D=1100/1000 mm (3 pcs.), H=24,00 m. 2,00 m The carrier mast consists of two height sections: 12 m and 10,25 m each. The metal frame of the lattice mast: posts - from a pipe 219x10 mm, spacers and braces - from a pipe 89x5 mm. Each post is attached to the foundation with 4 anchors with M42 bolts. Three chimneys are attached to the mast, Dv=1000 mm, Dn=1100 mm. Gas duct shafts 24,00 m high - factory-made by Baltvent - stainless steel 1,0 mm thick, D=1000 mm. Thermal insulation - from ROCKWOOL mineral wool mats 50 mm thick and an outer shell - from stainless steel 0,5 mm thick. The site is at the level of +21,83 m, the lightning rod is up to the level of +25,00 m. The foundation is columnar, made of monolithic reinforced concrete (concrete class B25, fittings class. AIII), sole size 5,40x5,40 m, for concrete preparation (concrete class B7,5) with a thickness of 100 mm and sand preparation with a thickness of 0,45 m with layer-by-layer trombling. Elevation of the base of the foundation -2,25 m (abs. elev.