Cost indicators

Estimated cost at the 2001 base price level (without VAT)
Total: thousand rubles 18607,54
Construction and installation works thousand rubles 9945,74
Equipment thousand rubles 5346,22
Other expenses thous.rub. 3315,58
including
PIR thousand rubles 1857,32
refundable amounts thous.rub. 64,78
Estimated cost at the current price level as of May 2013 (including VAT)
Total: thousand rubles 110635,27
Construction and installation works thousand rubles 72270,11
Equipment thousand rubles 20818,19
Other expenses thous.rub. 17546,97
including
PIR thousand rubles 7383,35
VAT thousand rubles 16834,40
refundable amounts thous.rub. 470,68

Information about the functional purpose of the object

 The purpose of the design is to develop design documentation for a boiler house under construction with external engineering networks for the reconstruction of the heat supply system, improving the quality and reliability of heat supply to buildings and structures. The main technical data of the facility: Thermal power of the technically re-equipped boiler house - 4,5 MW (3,87 Gcal/h); Installed boilers: - Thermotechnician TT100 - 1500 kW - 3 pcs. The main fuel is natural gas according to GOST 5542-87. The annual fuel demand is 1240,6 thousand nm3. The heat carrier is water, the temperature graph of the heating system is 95/70оС. The heat supply system is double-circuit two-pipe. The category of heat consumers in terms of reliability of heat supply and heat supply is the second. During the construction of the boiler house it is planned: Dismantling of the existing boiler equipment; Dismantling of building structures of the existing boiler house building; Dismantling of existing external heat supply networks; Dismantling of the existing chimney of the boiler house; Construction of a new boiler house building; Installation and installation of new boiler equipment; Construction of a chimney; Laying of new sections of external engineering networks to replace the dismantled ones.

Constructive part

The building of the boiler house is irregular in shape - L-shaped with a multi-level roof, with two walls the boiler house is attached to a residential building (in the axes 3 / A-B, B / 2-3), on the other sides it is surrounded by a courtyard area. Structural scheme of the building - wall with load-bearing longitudinal and transverse walls. Rigidity and spatial stability are ensured by the joint work of longitudinal and transverse walls, as well as roof beams. Characteristics of the structural elements of the building: The foundation for the walls - strip rubble; The walls are brick; Covering - metal corrugated board on metal beams; Roof - soft multi-level; The floors are concrete with tiled floors. The chimney is a spatial lattice, trihedral structure with four gas exhaust shafts located along the edges on cantilever remote platforms - 3xØ350 mm and 1xØ114,3 mm. The trihedral load-bearing tower is a straight prism with a face size of -1235 mm. The support nodes of the gas outlet shafts, in places where horizontal loads are transferred, provide freedom for the mutual temperature movements of the shafts and the tower. The belts and braces of the supporting tower are designed from electric-welded pipes. The struts and beams of the tower platforms are made of hot-rolled steel. The trunks are thermally insulated with ROCKWOLL brand WIRED MAT insulation 100 mm thick, followed by wrapping with thin-sheet galvanized steel 0,55 mm thick. The carrier tower is designed from 3 spatial blocks of factory readiness. Console platforms are prefabricated boards.

 Space-planning solutions for the boiler room

 The dimensions of the attached automated boiler house in the axes B-D/1-4 along the axes A-D/1-4 are 19,03x8,72 m, in the axes A-B/3-4 - 6,04x6,42 m, the height of the boiler room from 2,43 to 5,75 m. From the boiler room there are 2 exits directly outside to the courtyard area. The building is accessed by vehicles on an asphalt road. Building class - II; Degree of fire resistance - I; Wind load area according to SP 20.13330.2011 - II; Snow load area according to SP 20.13330.2011 - III; Boiler room area - 189,3 m2; Boiler room volume - 620,1 m3; Category of the premises for fire and explosion hazard - "G". For a relative mark of 0,000, the mark of the clean floor of the boiler room is taken, corresponding to the absolute mark of +6,030 m in the Baltic system of heights.

 Basic equipment

 Boilers Termotekhnik TT100 - 3 pieces, equipped with combined two-stage burners GKP-140 M of Oilon company, were accepted for installation. Rated heat output of the boiler brand TERMOTECHNIK TT100 - 1500 kW. The excess working pressure of the heat carrier in the boiler is 4,0 bar, the working temperature is 110 ˚С. Efficiency 92%. All overall dimensions of the boiler units are taken on the basis of the drawings issued by the boiler manufacturer. The selection of boiler units was made based on the provision of heat consumption for heating and ventilation in the maximum winter mode and heat loss in heating networks. THERMOTEHNIK ТТ100 — three-pass steel low-temperature water-heating boilers of gas-tube-smoke type, equipped with a pressurized furnace. The boilers are designed for the production of heating hot water with a maximum temperature of 115 °C at an allowable working pressure of 0,6 MPa.

 Technical characteristics of boilers

Rated heat output, kW: 1500
Maximum overpressure of water, MPa: 0,6
Maximum water temperature at the outlet of the boiler, 0С: 115
Minimum water temperature at the inlet to the boiler, 0С: 60
Nominal water consumption for Δt=15 0С, m3/h: 86
Hydraulic resistance of the water path at coolant flow rate for Δt=15 0C, kPa: 6,6
Flue gas consumption, kg/s: 0,68
Aerodynamic resistance of the gas path for maximum power, kPa: 0,65
Flue gas temperature, °C: 188
Furnace volume, m3: 0,793
Boiler water volume, m3: 1,86
Dry boiler weight, (weight tolerance 4,5%), kg: 3151

 Layout solutions

The boiler house has two rooms - the boiler room and the DGU room. The layout of the boiler house was developed using complete prefabricated blocks, consisting of plate heat exchangers, pumps and control devices. All imported materials and equipment are certified for use in Russia. The use of equipment blocks allows you to increase the degree of industrialization of installation work and reduce construction time. In the building of the boiler house, floors are being installed with the organization of foundations for the main equipment. The basis of the pumping and heat exchange equipment is a frame made of standard metal elements, anchored to the foundation of the boiler house building. Boilers K1.1 and K1.2 are located in axes "5-6", and boiler K1.3 in axes 3-4 / A-D, at an elevation of +0,100 m relative to the clean floor of the boiler room. The boilers are equipped with shut-off and control valves: main valve for direct and return water; safety valves; drainage taps. In the axes 2'-3/B-C of the boiler room, the expansion line equipment is located: an intermediate tank and membrane tanks. In the axes 1-2'/B-C of the boiler room there are network pumps. In the axes 1-2'/B-G of the boiler room, there are network heat exchangers. Along the axis 2' there is a zone for accounting for the parameters of the coolant supplied to the network. In the axes 3-4/B-D' at the level +2,380 there is a technological platform for servicing boilers, on which boiler and booster pumps are also located. Two pits are organized in the boiler room for the output of heat networks: the first is located in the axes 1-2'/B-D, the second - in the axes 3-4/A-B. The boiler room is categorized as “G” according to the location of production. The degree of fire resistance of the building is I. The building of the boiler house has two independent exits - from the boiler room and from the DGU room.

thermal scheme

 The connection of heat supply systems is carried out according to a closed independent 2-pipe scheme through heat exchangers designed to cover the heat output in the coldest month mode - each. Hot water boilers heat the coolant up to 110 ˚С, which is supplied to the network heat exchangers (2x2730 kW) and for the boiler house's own needs. To maintain the required return water temperature in the boiler circuit, Sauter three-way valves are used, installed on the return pipeline, at the inlet to each boiler unit. The circulation of the boiler (primary) circuit is provided by three Wilo IL 80/210-3/4 pumps. Each pump pumps the coolant through the corresponding boiler, which ensures the optimal hydraulic regime of the circuit. The circulation of the network (secondary) circuit is provided by two (one working, one standby) Wilo IL 125/340-30/4 pumps. The pressure of the network pumps was obtained based on the hydraulic calculation of the heat network. To maintain pressure in the boiler and network circuit, a block of two (one working, one standby) booster pumps Wilo MVI 104/PN25 is provided, installed after the source water inlet unit. The scheme provides for high-quality control of the temperature of network water in the direct pipeline according to the outside air temperature. Regulation is carried out with the help of a three-way valve "Sauter" installed at the outlet of the heat exchangers. To compensate for the thermal expansion of the coolant in the boiler circuit, two Reflex G600 membrane expansion tanks, each with a volume of 600 liters, and a Reflex V200 preliminary tank, with a volume of 200 liters, are provided. Clocking of the switching frequency of the booster pumps on the make-up line is provided by a membrane expansion tank Reflex DE 200, V=200l. The pipes are made of electric-welded steel according to GOST 10704-91, steel water and gas pipes according to GOST 3262-75 and stainless steel grade 08X18H10 (AISI 304). The pipelines are provided with fittings with automatic air vents at the highest points of all pipelines and fittings for draining water at the lowest points of the pipelines. Discharge of drainage water is provided for in an intermediate well (see section 53/13-K-NK).