Architectural and space-planning solutions

The project documentation provides for the construction of a separate boiler house building. The building of the boiler house is one-story, rectangular in plan, with dimensions in the axes of 10,00 x 24,50 m. The height of the building from the planning ground level to the top of the parapet is 7,60 m. For the relative mark of 0,000, the mark of the clean floor of the boiler room was taken, which corresponds to the absolute mark of 11.60. The building has a boiler room with two external entrances (door and gate). The door and gate are metal insulated, soundproof, fireproof. The outer walls of the building are made of hinged "sandwich" panels with a thickness of 150 mm. From the inside, 30 mm thick soundproof panels from Roquefon are attached to the walls and the coating. Window blocks are designed as easy-to-reset structures. Aluminum profile windows with single glazing. The roof is rolled flat with an unorganized external drain. Gas ducts (three chimneys) from the boiler house are designed to be attached to the wall of a detached residential building. The height from the planning mark of the earth to the top of the pipes is 85,15 m (the absolute mark of the top of the pipes is 96.55). The operation of the boiler house is designed without the constant presence of maintenance personnel.

Structural and space-planning solutions

The block-modular boiler house is designed from easily assembled metal structures with "sandwich" paneling. Metal structures are made of a closed bent profile 180x10, 120x6 (columns), I-beams 30K1, 20K1 and channel No. 20 (covering beams), connections from a bent profile 80x4. The outer walls are hinged "sandwich" panels of the "Petropanel" type with a thickness of 150 mm. The covering is made of "sandwich" panels 150 mm thick on metal beams. The spatial rigidity and stability of the building is ensured by the joint work of columns, beams, vertical and horizontal connections. Pile foundations. Bored piles with a diameter of 350 mm and a length 23 m (at absolute elevation -11.400). The grillage is adopted in the form of a monolithic reinforced concrete slab 400 mm thick, concrete B15, W4, F75. Under the foundation, a concrete screed 100 mm thick is provided, prepared from a sand-gravel mixture 350 mm thick. Gas outlet shafts with a height of 85,2 m and a diameter of 800 and 650 mm are attached to the wall of a residential building and are supported through supporting structures on the foundation of a residential building. The relative elevation of 0.00 corresponds to the absolute elevation of +11,60 m. In accordance with the report on engineering and geological surveys, the piles are based on light silty loams with high plasticity with IL=0,32, E=110 kg/cm2, φ=20, c=36 kPa. The maximum groundwater level is at a depth of 0,1÷0,2 m. 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 (for piles), the concrete surface is protected by coating with MBR-65 bitumen-rubber mastic. The expected average settlement of the building is not more than 1 mm.

Engineering equipment, utility networks, engineering activities

An automated gas stand-alone boiler house has been designed to provide heat to consumers in the quarter. According to the degree of explosion and fire hazard and fire resistance, the boiler room belongs to the category "G" and "II". The installed capacity of the boiler house is 20200 kW. Single glazing is provided as easy-to-reset structures at the rate of 0,03 m2 per 1 m3 of the volume of the boiler room. Heat consumers belong to the second category in terms of heat supply reliability. In the boiler house, two hot-water boilers of the TERMO-TECHNIK TT100 brand with a heat output of 8000 kW each are installed at the first stage for the designed buildings and one boiler of the TERMOTECHNIK TT100 brand with a heat output of 4200 kW is installed at the second stage with an increase in heat load to connect buildings of advanced construction. Boiler units are equipped with oilon burners: two burners GKP-1000M and one GKP-500M. Estimated heat output of the boiler house, taking into account losses in the networks and auxiliary needs of the boiler house - 16344,3 kW, including: for heating - 11321,9 kW (including for the second stage - 2849,3 kW); for ventilation - 1382,8 kW; for hot water supply 2760,1 kW (including for the second stage - 508,8 kW); for losses in heat networks and auxiliary needs of the boiler house - 879,5 kW. The main type of fuel is natural gas QpН = 33520kJ/m3 (8000 kcal/m3). The operating mode of the boiler house is year-round. Heating networks are connected through a hydraulic separator Du400. Regulation of the boilers and maintaining the necessary parameters of the coolant is provided by the automation of the boiler room. The operation of the boiler room is in automatic mode, without the constant presence of service personnel. To maintain the temperature in front of the boilers, the installation of three-way mixers МН32F is provided. The water temperature at the outlet of the boiler room is 105°C. To compensate for thermal expansion of water in the boiler and network circuit, a Gigamat pressure maintenance system is provided. Auxiliary equipment is installed in the boiler room: IL200/260 boiler circuit pumps, IL150/290 network pumps, booster pumps - MVI3202, chemical water treatment based on the Hydrogel reagent dosing complex - h201-AM. To account for thermal energy, it is planned to install electromagnetic flow converters ERSV 420F from Vzlyot. Gas ducts and individual chimneys are designed to discharge combustion products: for boilers with a heat output of 8000 kW with a diameter of 800 mm, for a boiler with a heat output of 4200 kW with a diameter of 650 mm. Thermal insulation of heat pipelines, gas ducts and equipment is provided. For gas supply to the gas equipment of the boiler house, on the basis of the Technical Specifications, it is planned to lay a medium-pressure polyethylene gas pipeline PE100 SDR11 with a diameter of 315 mm from the connection point along the South Highway to the designed polyethylene branch with an AVK DN225 valve device for laying a gas pipeline to the gas-using equipment of a boiler house of advanced construction, then laying an underground polyethylene gas pipeline medium pressure with a diameter of 225 mm to the exit from the ground at the designed boiler house. Further, it is planned to lay an overground steel gas pipeline of medium pressure with a diameter of 219 mm along the facade of the boiler room with the installation of a special insulated outlet SOI-2 and the installation of a flanged ball valve KShI-200f before entering the gas pipeline into the boiler room. The connection point is a medium-pressure steel gas pipeline with a diameter of 325 mm, laid along Sofiyskaya Street. Gas pressure at connection point – 0,23 MPa. At the connection point, an AVK DN225 gate valve is installed. Natural gas consumption - 2360,3 m3/h. The gas pressure at the gas pipeline inlet to the boiler room is 0,2228 MPa. For commercial accounting of the amount of gas in the boiler room, a gas meter STG150-1600 is installed. At the inlet of the gas pipeline to the boiler room, the following are installed: a thermal shut-off valve KTZ001-200-F, an electromagnetic valve VN8N-3, a gas filter FN8-1, provided for gas supply to all designed gas-using equipment. For technical accounting of gas consumption in front of each boiler with a heat output of 8000 kW, it is planned to install a gas turbine meter SG-16MT-650. A gas turbine meter STG-4200-80 was designed in front of the boiler with a heat output of 400 kW, intended for installation at the second stage. The designed tank for diesel fuel with a volume of 0,8 m³, fuel lines and shut-off and control valves provide for the possibility of operating the boiler house on liquid fuel. Water supply (cold water) and water disposal of the consumers of the facility is provided in accordance with the conditions of connection. Water supply (cold water) is provided from the projected intra-quarter water supply network through two inlets from pipes PE100SDR17 D = 110 mm. The inputs provide for the installation of water metering units according to TsIRV 02A.00.00.00 (sheets 204, 205). Guaranteed pressure at the connection point - 28 m of water. Art. Estimated consumption of cold water - 0,44 m3 / day (feeding of heating networks, preparation of hot water, cleaning); Irrigation of the adjacent territory - imported water. The estimated consumption of cold water for periodic needs is 25,0 m3 / day (filling the heating network system and the boiler circuit once a year). Water consumption for internal fire extinguishing - 5,0 l / s (2 jets of 2,5 l / s). The building has an integrated plumbing system. The required pressure for the combined water supply system is 25 m of water. Art. The integrated water supply system is a dead-end, single-zone. The number of fire hydrants D=50 mm - less than 12 pcs.  For the device of the integrated water supply system, steel water and gas pipes were selected. External fire extinguishing is provided from fire hydrants D=125 mm, installed on the projected water supply network. Water consumption for external fire extinguishing - 10 l / s. Drainage of domestic wastewater in the amount of 0,2 m3/day, periodic discharge - 25,0 m3/day once a year (the system is emptied once a year) is provided for in the projected intra-quarter utility networks of household sewerage. The connection point is at the border of the land plot. Removal of rainwater with a flow rate of 6,17 l / s is provided for in the projected intra-quarter utility networks of rain sewerage. The connection point is at the border of the land plot. Polypropylene two-layer sewer pipes D = 160-200 mm were selected for laying household and rain sewer networks. The following systems have been designed for the building: domestic sewage, industrial sewage (for the removal of conditionally clean effluents from the technological equipment of the boiler house), external drains. Cast-iron sewer pipes and steel electric-welded pipes were chosen for the installation of household and industrial sewerage systems. Power supply of a free-standing gas boiler house on the intra-quarter territory, in normal mode, is provided from the public electric networks of the centralized power supply system, according to the specifications. Estimated power 220,2 kW, voltage class 0,4 kV, connection points - RUNN 0,4 kV in the new BKTP. The category of power receivers in terms of power supply reliability is the second, it is provided from two independent mutually redundant sources, the power receivers of security systems (the first category) are provided from the UPS. The grounding device of the boiler house consists of a common artificial external ground and a natural ground electrode - the foundations and floor of the boiler house building. Electricity metering devices are installed at the border of the balance sheet in the RUNN 0,4 kV BKTP and on the ASU panels of the boiler house. The device of distribution and group networks - according to the standards, protective devices are installed on the panels of the ASU and local shields, lighting control devices and sockets for portable electrical receivers - on the walls. Grounding of open conductive parts of electrical equipment - through PE conductors in cables of a group and distribution network, the type of grounding system for open conductive parts is TN-S (separate), the equalization system and potential equalization comply with the standards. The adopted circuit design solutions of the electrical installation being designed ensure the electrical safety of uncategorized and operational personnel (solid insulation, shutdown of non-stationary processes, absence of contact voltage, etc.). Lightning protection of the building is provided by lightning rods on chimneys, a metal mesh on the roof of the boiler house and down conductor devices connected to the ground electrode system. Automation of production processes and security systems was carried out in accordance with the standards. To transfer information to control panels (gas consumption, gas alarm, technological parameters of boilers, etc.), radio channels of mobile systems and a configured modem with Internet access are used. The heating of the boiler house is provided by heat surpluses from equipment and pipelines and additionally by air-heating units. Ventilation - natural and mechanical based on the assimilation of excess heat, at least a single air exchange. Exhaust - through deflectors and additionally with an axial fan in the warm season, inflow - through louvered grilles in the outer wall, taking into account the compensation of air for combustion. The air intake grilles provide for the installation of air-heating units.