Architectural and space-planning solutions

The designed boiler house is placed on the foundation of the existing boiler house to be dismantled. The boiler house is adjacent to house 12 and house 13 lane, and is a one-story L-shaped building in plan with dimensions in the axes of 29,84 m x 21,74 m. Height is 5.80 m. A chimney with a height of 20,00 m is attached to the firewall wall house number 12. 2 rooms are designed in the boiler room: a boiler room and a diesel generator room with isolated entrances. The walls of the boiler room are made of sandwich panels (with factory-made finishing), the plinth is made of brick, plastered and painted, the roof is made of a polymer membrane. 8.2.2. Protection of cultural heritage sites. Sections of the route of heating networks are laid along the basements of buildings. The laying of engineering networks on the territory of the archaeological layer is carried out accompanied by archaeological supervision.

 Structural and space-planning solutions

In accordance with technical surveys, the existing building was built in the second half of the 2.11th century according to a wall structural scheme. The project provides for the dismantling of the above-ground structures of the boiler house in accordance with the address program. The foundations of the existing boiler house are tape made of concrete blocks. Foundation laying depth 2.12÷500 m, footing width 270 mm. At the base of the foundations there are silty sands of medium density with E=2 kg/cm30, φ=0,65, epeski=0,04, c=2 kg/cm160. The technical condition of the foundations is operational. The project provides for the dismantling of the above-ground part of the boiler house and the construction of a modular boiler house. The building was designed according to the frame structural scheme. The boiler room is designed from metal structures with sandwich paneling. Columns - a closed bent profile 7 x 140 (connections from a bent profile 4 x 30245) according to GOST 2003-20. Beams - steel from I-beams 1B26, 1B35 and 1K26020 according to GOST 83-60. The cover is designed from profiled sheet H845-0,9-16 according to the purlins from channel 100E. External walls are hinged "sandwich" panels 120 mm thick and self-supporting brick walls 1 mm thick, made of KORPu 150NF / 1.4 / 50 / 530 bricks in accordance with GOST 2007-300. Spatial rigidity and stability of buildings is ensured by the joint work of vertical and horizontal connections. The foundations of the boiler house are existing strip foundations, on which a monolithic reinforced concrete slab 15 mm thick, concrete B4, W100, F100, is laid. A 20,0 mm thick concrete preparation is provided under the slab. Chimneys with a height of 900 m and a diameter of 245 mm are mounted on a flat metal truss and attached to the brick walls of the existing building. Bearing metal structures are designed from channels and bent-welded pipes. Steel C0.00. The relative elevation of 6,43 corresponds to the absolute elevation of +360 m. In accordance with the report on engineering and geological surveys, the existing foundation is based on dense silty sands with E=2 kg/cm34, φ=0,55, epeski=0,06, c=2 .2,21 kg/cm2. The design resistance of the foundation soils is not lower than R=1,65 kg/cm2. The pressure on the ground does not exceed p=0,5 kg/cm5,80. The maximum level of groundwater at a depth of 4 m (abs. Elev. 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 WXNUMX, the concrete surface is protected by coating with a waterproofing coating. The expected average settlement of the building is not expected, since the designed building is lighter than the demolished one. The stability of the pipes is ensured. According to the results of the survey, the category of the technical condition of buildings in the surrounding area is XNUMXnd category.

Engineering equipment, utility networks, engineering activities

In accordance with the contract for the technological connection of the electrical installations of the boiler house to the electrical networks the only source of power for the boiler room is the 1st section 6kV SS 110/10/6kV. The connection point is installed with 630kVA transformers. The power supply of the boiler house is provided from one section of RU-0,4kV TP-879 along one CL-0,4kV 2APvBbShp-1-4x185 with a length of 280 m. ) SDMO J320K with a capacity of 300kVA with an automatic start-up system and uninterruptible power supplies (hereinafter referred to as UPS) in the control system circuits. Estimated recovery time of heat supply to consumers of the boiler house after a power outage from SS 275 is not more than 320 minutes. The main consumers of electrical energy of the boiler house are: network pumps, recirculation pumps of the boiler circuit, burner fans and fuel pumps of boiler units, cold water booster pumps, control system. With regard to the reliability of power supply, the complex of electrical receivers of the boiler house belongs to the second category; fire, security alarm, gas analyzer, control and dispatching system of the boiler room - to the first category. Restoration of power in the event of a power failure of the boiler house from PS 320: for power receivers of the 2nd category, automatic, after starting and entering the operating mode of the diesel power plant of the boiler house; for electrical receivers of the 1st category - automatic from built-in UPS. The estimated electrical load of the boiler room is 237,36 kVA. For distribution networks, a cable of the VVGng type was selected. All cables and wiring (starting from the ASU) in three-phase networks are five-core, in single-phase networks they are three-core. The equipment of switchgears and electric networks was checked for long-term permissible load, for the time of disconnection of the damaged section of the circuit by protection devices, for voltage losses, for heating, for short circuit mode. The security system was adopted by TN-CS with a device at the input to the boiler room for re-grounding the neutral conductor and the main potential equalization system. The PE VRU-0,4 kV bus is used as the GZSH. The resistance to direct current spreading of the artificial earth electrode is 3,64 ohm. The generator neutral, lightning protection, GZSH are connected to the ground electrode. A steel lightning rod is installed on the chimney and connected to the grounding conductor through a chimney frame with a 40x5 steel strip. For commercial metering of electrical energy, single-tariff electricity meters Mercury 230 ART2-03 (network), TsE2727 (DES) are installed. Water supply and sanitation - in accordance with the conditions of connection. Water supply (cold water) for consumers of the facility is provided through two water supply inlets with a diameter of 90 mm from the public water supply network with a diameter of 219 mm along Dmitrovsky per. The laying of water inlets, where the security zone of the network is not completed, is agreed in the cases by the conclusion. Polyethylene pipes according to GOST 18599-2001 were selected for laying water inlets. The designed inputs provide for the installation of water metering units according to the drawings TsIRV 02A.00.00.00 album sheets 32, 33 with a bypass line. Bypass lines are provided with electric gate valves. Guaranteed pressure at the connection point - 28 meters of water column. Cold water consumption – 41,22 m3/day, including: for feeding heating networks - 40,32 m3 / day; for filter regeneration – 0,9 m3/day. (1 time in three days). Periodic Needs: for wet cleaning of the boiler room - 0,1 m3 / day. (1 time per month); for filling heating networks - 224,46 m3 / day. (1 time per year); for filling the boiler room system - 28,85 m3 / day. (1 time per year). An integrated water supply system has been designed for the facility. The scheme of the integrated water supply system is a dead-end, with two inlets ringed. AISI 304 stainless steel pipes and electric welded steel pipes according to GOST 10704-91 were selected for the installation of the integrated water supply system. Water consumption for internal fire extinguishing 2 x 2,6 l / s. The number of fire hydrants with a diameter of 50 mm - 3 pcs. The required pressure for household needs is 14,57 meters of water column. The required pressure for the internal fire extinguishing system is 16,92 meters of water column. External fire extinguishing is provided from the existing fire hydrant No. 127b, on the public water supply network with a diameter of 219 mm along Dmitrovsky per. Water consumption for external fire extinguishing - 10 l / s. Removal of domestic wastewater in the amount of 0,1 m3/day. (1 time per month), process effluents from filter regeneration in the amount of 0,9 m3/day. (1 time in three days) and from the drain of the boiler circuit in the amount of 28,85 m3 / day. (1 time per year) one outlet is provided for the projected on-site sewerage network, with the discharge of effluents into well No. At the outlet from the boiler house in well No. 184, a cooler well is provided, in well No. 200, a valve is provided. The drainage of rainwater from the roof and the adjacent territory with a flow rate of 1 l / s is provided using a drainage tray and a sand trap with connection to the designed storm water well D3, with discharge of wastewater into well No. 6,11 on the on-site combined sewerage network. For laying the sewer network, polypropylene pipes of the Pragma type with a diameter of 1/2 mm were selected, 225/200 mm and PVC-U with a diameter of 110 mm. An industrial sewerage system has been designed for the facility. Cast iron sewer pipes according to GOST 6942-98 were selected for the installation of the industrial sewerage system. The heat carrier for heating is water with temperatures of 95-70ºС from the boiler circuit. Heating is air. As heating devices, 7 air-heating units of the type KEV-49T3,5W2 of the Teplomash company are used. In the diesel generator room, the heating system is two-pipe, horizontal. Heating appliances: steel panel radiators with bottom connection from DiaNorm (Germany). Pipelines of the heating system are steel water and gas pipelines in accordance with GOST 3262-75. Ventilation supply and exhaust natural and mechanical. Air exchange is designed for the assimilation of excess heat. The air enters the boiler room through the louvered grilles. Air removal through deflectors installed on the roof, removed from the shade zone from higher neighboring buildings. A mobile unit has been designed to remove combustion products after the application of powder fire extinguishing. Diesel generator: In the operating mode of the diesel generator, air exchange is provided in the room, designed for the assimilation of excess heat. Air enters the diesel generator room through the louvered grille. Air is removed through a deflector mounted on the roof of the diesel engine. Outside the emergency mode, ventilation is natural single. For heat supply of residential and public buildings, an automated, gas, attached boiler house was designed (coordination of the placement of a heat supply source of the Committee on Energy and Engineering Support dated March 28.03.2011, 102 No. 17,4). 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 0,03 MW. Sandwich panels on a special fastening are provided as easily dropped structures at the rate of 2 m1 per 3 mXNUMX of volume. Heat consumers belong to the second category in terms of heat supply reliability. Three water-heating boilers of the GKS-Dinatherm 5000 brand with a capacity of 5800 kW from the WOLF company with combined GKP burners from the Oilon company are installed in the boiler room. The estimated heat output of the boiler house, taking into account losses in the networks and auxiliary needs of the boiler house, will be 17,403 MW, including: for heating and ventilation - 16,04 MW; for losses in heat networks and own needs of the boiler house - 1,363 MW. The main type of fuel is natural gas QpН = 33520 kJ/m3 (8000 kcal/m3). The operating mode of the boiler house is only during the heating period. The scheme for connecting heat networks intended for transporting heat carriers to heat supply systems is independent through heat exchangers. It is planned to control the temperature of the coolant depending on the outside air temperature. 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. The water temperature at the outlet of the boilers is 105°C. The heat carrier at the outlet of the boiler room is water with a temperature of - 95°C. To compensate for thermal expansion of water, a membrane expansion tank with a capacity of 750 liters is provided. Auxiliary equipment is installed in the boiler room: individual pumps of the boiler circuit - IL 125/210; network circuit pumps - IL 100/190; booster pump - MVI 403; heat exchangers lamellar heating systems M15-BFM; installation of water softening STF. To account for the consumption of thermal energy, it is planned to install a metering unit based on electromagnetic flow meters. Individual gas ducts and three chimneys have been designed to remove combustion flue products. The temperature of the outgoing flue gases is 180°C. The design documentation provides for thermal insulation of heat pipelines, gas ducts and equipment. Reserve fuel supply is not provided. The designed tank for diesel fuel with a volume of 750 liters, fuel lines and shut-off and control valves provide for the possibility of operating the boiler house on liquid fuel. To improve the reliability of power supply, it is planned to install a diesel generator in a separate room "SDMO J300K" with a capacity of 275 kVA with a fuel supply system, fittings and pipelines. Gas supply to the boiler house is provided in accordance with with TU. The connection point is a medium-pressure steel gas pipeline with a diameter of 219 mm, laid to a closing boiler house. On the facade of the boiler house, design solutions provide for the installation of ShRP-NORD-Dival. Further along the facade of the boiler house, a low-pressure steel gas pipeline is laid before entering the building. Gas pressure at the tie-in point is 0,11 MPa. The gas pressure at the inlet to the boiler room is 5,00 kPa. For laying, steel electric-welded longitudinal pipes were selected according to GOST 10704-91, V-10 GOST 10705-80*. For commercial accounting of the amount of gas, a gas meter SG is installed. The maximum gas consumption is 2103,3 m3/h. At the entrance of the gas pipeline to the boiler room, the following are installed in series: thermal shut-off valve KTZ-001; gas filter FN; solenoid valve VN6N; gas meters STG. From the building of the boiler plant for heat supply to consumers, heat networks are designed. The heat load of the heat consumption systems of connected subscribers is 11,18 Gcal/h. The connection point is the collector of the boiler room. The laying of pipelines of the heating network is two-pipe. Laying of pipelines of the heating network - underground, channelless, in the channel when approaching buildings, at the corners of the pipelines, in a case under driveways and aboveground along the technical underground of buildings. For laying pipelines, steel pipelines were selected according to GOST in PPU-345 insulation for underground laying and in insulation with mineral wool cylinders laminated with aluminum foil when laying along the technical underground. With pipeline diameters less than 150 mm, for underground laying, isoproflex pipelines in PPU insulation were selected. The security alarm system of the facility was designed using the Quartz control panel, the Foton-Sh and Foton-9 security detectors, and magnetic contact sensors. Access to the facility, disarming and arming is provided by the TM key. To transmit an alarm message to the monitoring station, the radio equipment of the security alarm "Arkan" was selected. To control the warning and fire extinguishing system, the project provides for the installation of the control panel "START-4A", with the function of controlling automatic fire extinguishing. IP-212-SU, IPR-3SU, "PS-11" (siren), KOP-25-P (panel) were chosen as detectors. To control the powder fire extinguishing system, a PUP unit with the START-8 automatic fire extinguishing control function, Tungus-9 powder fire extinguishing modules are provided. Vekson-AVS was adopted as a fire-extinguishing powder.