Constructive part

Automated gas boiler. The building of the boiler house is irregular in shape - U-shaped with a multi-level roof, with two walls the boiler house is attached to residential buildings (along the axes 3/A-D, 5/B-D), 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 five gas exhaust shafts located along the edges on cantilever remote platforms - 3xØ600 mm, 1xØ139,7 and 1xØ76,1 mm. The trihedral load-bearing tower is a straight prism with a face size of -1830 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 factory-ready shields.

Space-planning solutions for the boiler room.

The dimensions of the attached automated boiler house in axes 1-5 / B-D are 21,01x7,38 m, in axes 1-3 / A-B - 8,95x10,06 m, in axes 3-4 / B-C - 3,69, 5,20x3,60 m, the height of the boiler room is from 5,35 to 3 m. There are 20.13330.2011 exits from the boiler room directly outside to the courtyard area, two from the boiler room and one from the DGU room. 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 307,7 - III; Boiler room area - 2 m1478,0; The volume of the boiler house is 3 m0,000; Category of the premises for fire and explosion hazard - "G". For a relative mark of 7,420, the mark of the clean floor of the boiler room was taken, corresponding to the absolute mark of +XNUMX m in the Baltic system of heights.

Basic equipment

Boilers Termotekhnik TT100-3000 - 2 pcs, equipped with combined modulating burners GKP-280 M of Oilon company and Termotekhnik TT100-3500 boiler - 1 pcs, equipped with combined modulating burner GKP-400 MI of Oilon company were accepted for installation. For the preparation of hot water, a wall-mounted boiler with a power of 24 kW, Logomax U032K brand from Buderus, is used. All overall dimensions of boiler units are taken on the basis of 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, provision of hot water supply, provision of the boiler house's own needs 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. Logomax U032K is a compact gas wall-mounted boiler with a closed combustion chamber, equipped with a primary heat exchanger, modulating burner, expansion tank, pump, safety valve, flow sensor, control and safety devices.

Layout solutions

The boiler house under construction has two rooms - the boiler room and the diesel generator 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 with a capacity of 3000 kW are located in the center of the boiler room in the axes "3-4", a boiler of 3500 kW in the axes "2-3" on the right at a mark of +0,100 m relative to the clean floor of the boiler room, a wall-mounted boiler for DHW needs, is located in the axes "3- 4/B" at the technological site at the level of +4,500 m. The boilers are equipped with shut-off and control valves. In axes "4-5" of the boiler room, the following equipment is located: boilers of the DHW circuit, expansion tanks, booster pumps, and a chemical water treatment complex. In the axes "1-2" of the boiler room, there are MOS, a zone for accounting for the parameters of the coolant of the network circuit and network pumps. In the axes "1-2" at the level of +2,550 on the technological site, network heat exchangers are located. Boiler circuit pumps are also installed on this site, in axes "2-3", "3-4" and expansion tanks of the boiler circuit "3-4". Four pits are organized in the boiler house for the output of heat networks: the first is located in the axes 1-2 / G, the second - in the axes 1 / B-D, the third - in the axes 1 / A-B, the fourth - in the axes 1-2 / A. 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 room has three independent exits: two from the boiler room and one from the DGU room.

thermal scheme

Connection of heat supply systems is carried out according to a closed independent 4-pipe scheme through heat exchangers. Heat exchangers for the heating system designed to cover the heat output in the mode of the coldest month - each. For the DHW system, the installation of two storage water heaters with a capacity of 400 liters each is provided. Hot water boilers heat the coolant up to 110 ˚С, which is supplied to network heat exchangers (2x5780 kW), to storage water heaters 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. To prepare the DHW coolant, two Reflex SB 400 storage water heaters, each with a volume of 400 l, are used, equipped with shut-off valves, instrumentation and titanium anodes, which provide long-term corrosion protection and do not require maintenance. The circulation of the boiler (primary) circuit is provided by three Wilo IL 100/250 pumps -7,5/4. 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 150/335-45/4 pumps. The pressure of the network pumps was obtained based on the hydraulic calculation of the heat network. Circulation in the hot water circuit is provided by one Wilo TOP-Z 25/10 pump. To ensure the hydraulic operation of the boiler circuit, a Wilo TOP-Z 25/6 pump is installed in the flow pipe before the DHW cylinders. To maintain pressure in the boiler, network circuits and the DHW circuit, it is planned to install a block of two (one working, one standby) booster pumps Wilo MVI 404/PN25 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, manufactured by Sauter, installed at the outlet of the heat exchangers. To maintain a constant temperature in the DHW system, a three-way valve manufactured by Sauter is installed in front of each DHW cylinder in the supply pipe of the boiler circuit. In summer, to provide the needs of the DHW system with a heat carrier, a wall-mounted gas boiler Logomax U032K is installed, connected in parallel to the boiler circuit. To compensate for the thermal expansion of the coolant in the boiler circuit, two membrane expansion tanks Reflex G1500, with a volume of 1500 l and Reflex G1000, with a volume of 1000 l and a preliminary tank Reflex V200, with a volume of 200 l are provided. To compensate for thermal expansions in the boiler circuit during the summer, it is planned to install a Reflex NG 12 expansion tank with a volume of 12 liters. 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.

Water treatment plant

The water treatment system is designed for a boiler room with hot water boilers, for the needs of feeding the heating network and the boiler circuit. Initial data: 1. Source of water supply - city water supply. 2. The mode of operation is continuous, straight-through. 3. The quality of the source water corresponds to the result of the analysis of the source water.