Architectural and space-planning solutions

The building of the boiler house is designed without a basement and an attic, rectangular in plan, with dimensions along the outer contour of the walls 19,4x12,2 m, from six interlocking modules with dimensions in the plan of 12,0x3,2m each. The height of the boiler room to the bottom of the truss structure is 3,7 m. Parapet top elevation + 4,520m. Eave height + 4,020m. Planning mark of the earth -0,300m. For a relative mark of 0,000, the mark of the clean floor of the boiler room was taken. A diesel generator room is fenced off in the boiler room. The frame of the boiler house is metal, frame-bonded. Walls - "sandwich panels" 100mm thick with mineral wool insulation. Window blocks - metal-plastic with single glazing. Doors external and internal - metal, in usual and fire-prevention execution. Partitions - "sandwich panels" 100mm thick with mineral wool insulation. Floors - aluminum and steel sheets of rhombic corrugation on steel beams. Covering - roofing "sandwich panels" 120 mm thick with mineral wool insulation over steel girders.

Structural and space-planning solutions

The modular boiler house is designed from easily assembled metal structures with "sandwich" paneling. Metal structures are designed from a closed bent profile 180x140x5, etc. (connections - from a bent profile 80x5) in accordance with GOST 30245-2003. External walls - hinged "sandwich" panels 100 mm thick. The coating is made of "sandwich" panels 120 mm thick along the metal frame. Spatial rigidity and stability of buildings is provided by vertical and horizontal connections. The foundations are taken in the form of a monolithic reinforced concrete slab 300 mm thick, concrete B25, W6, F200. A 100mm thick concrete preparation is provided under the foundation. Chimneys (gas ducts) with a height of 25m and an outer diameter of 500mm are fixed on an exhaust tower in the form of a spatial metal structure installed on its own foundation. The metal structures of the exhaust tower are taken from racks (pipe with a diameter of 89x4, 108x4 and 133x4), united by a lattice of 89x4 pipes. Foundations - columnar on a natural basis. Concrete B25,W6, F200. Reserve fuel tanks are designed according to a standard design with a capacity of 30m³. The foundations for the tanks are taken in the form of a monolithic reinforced concrete slab 300 mm thick, concrete B25, W6, F200. A 100mm thick concrete preparation is provided under the foundation. The relative elevation of 0,000 corresponds to the absolute elevation of +66.30m. In accordance with the report on engineering and geological surveys, the base of the foundation is medium-sized sands of medium density with E=330kg/cm², e=0,6. The design resistance of the foundation soils is not lower than R = 2,35 kg / cm². The pressure on the ground does not exceed p=1,02kg/cm². The maximum groundwater level is at a depth of 0,51,5m. Groundwater is non-aggressive to concrete of normal permeability. In order to protect the concrete of underground structures, the concrete grade for water resistance is W6, the concrete surface is protected by coating with bitumen twice. The expected average draft of the building is no more than 2,4 cm. The stability of the chimney is ensured.

Engineering equipment, utility networks, engineering activities

For heat supply to consumers of buildings and structures within the boundaries of the village, an automated gas stand-alone boiler house with an installed capacity of 6,5 MW was designed. Reliability category of heat supply from the boiler house - II. According to the type of accommodation, the boiler room is a separate one. According to the degree of explosion and fire hazard and fire resistance, the boiler room belongs to the category "G" and "II". Single glazing at the rate of 0,03 m² per 1 m³ of the boiler room volume is provided as easy-to-reset structures. Heat consumers belong to the second category in terms of heat supply reliability. The boiler room is equipped with two hot water boilers THERMOTECHNIK TT 100-2000, 2000 kW power, equipped with combined modulating burners GKP-150 M from Oilon company and one boiler TERMOTECHNIK TT 100-2500, power 2500 kW, equipped with combined modulating burner GKP-280M from Oilon ". The estimated heat output of the boiler house, taking into account losses in the networks and the boiler house's own needs, will be 6,25 MW, including: for heating - 2,71 MW; for hot water supply - 2,56 MW; for prospective connection and reserve - 0,57 MW; for losses in heat networks and own needs of the boiler house - 0,41 MW. The main fuel is natural gas with a calorific value of 8000 kcal/Nm3 according to GOST 5542-87. Reserve fuel - winter diesel fuel with a pour point of at least -35°C in accordance with GOST 305-82. The regulation of the operation of boilers and the maintenance of the necessary parameters of the coolant are provided by the automation of the boiler room. The water temperature at the outlet of the boilers is 110°C. The scheme for connecting heating and hot water systems to the boiler room is independent. Network heat exchangers - 2x1500 kW, hot water heat exchangers - 2x1400 kW. To ensure the circulation of the boiler circuit, two WILO Inline-IPL 50/140-4/2 pumps (plus one in reserve) and one WILO IL 65/150-5,5/2 pump are provided. To ensure the circulation of the network circuit - two (one working, one standby) WILO IL 100/170-30/2 pumps, equipped with a variable frequency drive system. Provides high-quality control of the temperature of the network water in the direct pipeline according to the outside air temperature using a three-way valve. To ensure water recirculation in DHW networks, a Wilo IL 32/140-1.5/2 pump is installed. To compensate for the thermal expansion of the coolant in the boiler circuit, three membrane expansion tanks with replaceable membranes are provided. To compensate for the thermal expansion of the coolant, a membrane expansion tank V = 200l is provided on the make-up line. For water softening, a sodium-cationite water softening plant is provided, to eliminate corrosion in the system - dosing of ADVANTAGE K 350 reagent corrosion inhibitor into softened water. Removal of combustion products from each boiler - through individual gas ducts Du500, passing through the wall of the boiler room in sleeves, and then - to individual chimneys. Pipe height -25 m. Cold water supply (CW) to consumers of the facility in accordance with the technical specifications of the apartment-operational part, by letter of the apartment-operational part, is provided from the KECH D 150mm water supply networks, laid across the territory of the village along two water inlets with a diameter of 160mm. Polyethylene pipes according to GOST 18599-2001 were selected for laying the water supply network and inputs. The inputs provide for the installation of water metering units according to TsIRV 02A.00.00.00 (album sheets 64,65) without bypass lines. Guaranteed pressure at the connection point - 15 m w.st. Estimated consumption of cold water, taking into account the preparation of hot - 216,10 m³ / day, including: for household needs - 0,1 m³ / day, The building has an integrated plumbing system. Required pressure for technological needs - 13,91 m w.st. The scheme of the cold water supply system is a dead end. Galvanized steel water and gas pipes according to GOST 3262-75* were selected for the installation of a cold water supply system. For irrigation of the territory, along the perimeter of the building, watering taps D25 mm are installed. Water consumption for internal fire extinguishing - 5l / s (2x2,5l / s). The number of fire hydrants D50mm - 2 pieces. The required pressure for the internal fire extinguishing system is 16,17 m w.st. To ensure the required pressure in the pipeline supplying water for firefighting needs, a pressure booster is provided. The fire-fighting water supply system is dead-end. Galvanized steel water and gas pipes according to GOST 3262-75 * were selected for the installation of a fire-fighting water supply system. External fire extinguishing is provided from a fire hydrant D125mm, installed on the projected street network, and existing - on the KECh water supply network. Water consumption for external fire extinguishing - 10 l / s. Removal of domestic wastewater in the amount of 0,1 m³/day, industrial wastewater in the amount of 11,0 m³/day (1 time in 4 days), 10,0 m³/day (1 time per year), rainwater runoff with a flow rate of 4,3 l / s is provided for in well No. 3 (stuffed), installed on the network of municipal household sewerage, owned by KECh. Drainage of storm drains from well DK2 - into the existing well No. 111 of the household sewerage system KECh. Polypropylene pipes "Pragma" D = 225/200mm were chosen for laying the common alloy network. Wastewater treatment is not provided. A cooler well is installed at the outlet of wastewater when discharging hot water from the boiler house. An industrial sewerage system has been designed for the building. Cast iron sewer pipes according to GOST 6942-98 were selected for the installation of industrial sewage systems. In accordance with the Specifications for connection to heat networks and the Design Assignment, heat supply to consumers is provided from the designed block-modular boiler house. The connection point is the collectors of the boiler room. Heating system - 4 pipe. Connection of heating systems of buildings to heat networks - according to a dependent scheme, hot water supply - open water intake with a circulation pipeline. During the reconstruction of the heat supply system, the following is provided: dismantling of the existing heat supply networks from the boiler house building to the first flange of each metering unit located in the buildings; dismantling of heating chambers and wells. Heat carrier temperature: Т1-95°С, Т2-70°С, Р1 – 44,00 mw.st; P2 - 30.00 m w.st; Т3=65°С, Т4=55°С Р3 – 35,00 m w.st.; P4 - 22.16 m w.st. The laying of heat networks is accepted: underground channelless (1615m), in channels (24m) at turning angles and in steel cases when passing under roads and ditches; aboveground in the basements of buildings (150m). For underground laying of heating networks, electric-welded steel pipes according to GOST 10704-91 made of high-quality carbon steel grade 10sp GOST 1050-74 gr. polyethylene (in sections from the boiler house to UT-100) and the pipe "ISOPROFLEKS-A" P = 4 bar made of cross-linked high-density polyethylene with thermal insulation made of polyurethane foam and a waterproof coating according to TU 10-5768-007-27519262. For DHW networks, IZOPROFLEX pipes P = 10 bar made of cross-linked high-density polyethylene with thermal insulation made of polyurethane foam and a waterproof coating according to TU 5768-007-27519262-2002 were selected. For laying heating systems in heating chambers and in the basements of residential buildings, electric-welded steel pipes were selected according to GOST 10704-91 from high-quality carbon steel grade 10sp GOST 1050-74 gr. "B", heat-treated, with 100% quality control of steel seams, with processing in two layers of bitumen-rubber organo-silicate mastic grade MBR-OS-X-150 according to TU 5757-003-2744-9797-94, followed by installation of heat-insulating cylinders made of mineral wool on a synthetic binder 40 mm thick, fastened with a metal reinforcing mesh, further coated with asbestos-cement mixture and primer GF-021 according to GOST 25129-82. For laying DHW networks, pipes made of corrosion-resistant steel according to GOST 11068-81 with two layers of bitumen-rubber organo-silicate mastic grade MBR-OS-X-150 according to TU 5757-003-2744-9797-94 were selected, followed by installation heat-insulating cylinders made of mineral wool on a synthetic binder 40 mm thick, fastened with a metal reinforcing mesh, further coated with an asbestos-cement mixture and a primer GF-021 in accordance with GOST 25129-82. Reinforced polypropylene pipes were selected for laying in the basements of buildings No. 26, 27, 28. Compensation of steel pipelines - due to the angle of rotation and bellows compensators. Gas supply to the boiler room equipment is provided from a medium-pressure polyethylene gas pipeline Du=90mm, laid according to the project. Gas pressure at the inlet to the boiler room Pi = 0,291 MPa MPa (abs.). The diameter of the gas pipeline at the inlet is Du=80mm. For commercial accounting of the amount of gas, a gas meter is installed. The maximum hourly gas consumption is 760 Nm³/hour. Annual gas consumption - 1548 thousand nm³. At the gas pipeline inlet to the boiler room, the following are installed in sequence: thermal shut-off valve KTZ-001-80, Du80, Ru1,6 MPa; solenoid valve VN3N-6, Du80, Ru0,6 MPa; gas filter FN3-6, DN80, Ru0,6MPa, equipped with a pointer differential pressure gauge; gas meter SG-16MT-250-40-S, DN80 with electronic gas volume corrector Logic 761.2 complete with temperature and pressure sensors.