Information about the functional purpose of the object of reconstruction. The purpose of the design is to develop design documentation for a technically re-equipped boiler house 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 - 1,02 MW (0,877 Gcal/h); Installed boilers: Logano GE515 - 510 kW - 2 pcs., Main fuel - natural gas according to GOST 5542-87. The annual demand for fuel is 291,894 thousand nm3. The heat carrier is water, the temperature graph of the heating system is 95/70оС. The heat supply system is three-circuit four-pipe. The category of heat consumers in terms of reliability of heat supply and heat supply is the second. In the course of the technical re-equipment of the boiler house, it is assumed: Dismantling of the existing boiler equipment; Dismantling of existing external heat supply networks; Dismantling of the existing chimney of the boiler house; Installation and installation of new boiler equipment; Construction of chimneys; Laying of new sections of external networks to replace the dismantled ones.

Structural part. Built-in gas boiler. The building of the built-in gas boiler house is complex in plan, six-story, with a basement and an attic. The building was built before the middle of the 2th century, information about the ongoing major repairs of the building has not been preserved. The structural scheme of the examined building is 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 beams of interfloor ceilings. Characteristics of the structural elements of the building: The foundation for the walls - strip rubble; Walls - brick, wooden; Ceilings - metal floor beams with concrete inter-beam filling, wooden; Roof - gable, from roofing iron; The floors are concrete with tiled floors. The chimney is a spatial lattice, trihedral structure with two gas exhaust shafts located along the edges on cantilever remote platforms - 250xØ1,5 mm made of stainless steel 500 mm thick. The trihedral bearing tower is a straight prism with a face size of 100 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. To compensate for the wind load, the upper third of the chimney is attached with guy wires to the boiler building. The trunks are thermally insulated with ROCKWOLL brand WIRED MAT insulation 0,55 mm thick, followed by wrapping with thin-sheet galvanized steel 3 mm thick. The carrier tower is designed from XNUMX spatial blocks of factory readiness. Console platforms are factory-ready shields.

Space-planning solutions for the boiler room. The built-in automated boiler house is located in two rooms of the building: the boiler room is located on the ground floor in the axes A-D / 2-3 (the dimensions of the room are 5,86x5,3 m, the height is 4,14 m), the pump room is on the ground floor in the axes A -B / 1-2 (room dimensions - 3,44x4,12 m, height from 3,0 m). From the boiler room, an exit is provided directly outside to the courtyard area. The building is accessed by vehicles on an asphalt road. Building class - II; Degree of fire resistance of the boiler room - I; Wind load area according to SP 20.13330.2011 - II; Snow load area according to SP 20.13330.2011 - III; The area of ​​the boiler room is 30,1 m2; pumping area - 14,17 m2; The volume of the boiler room is 124,6 m3, the pump room is 42,5 m3; The category of the boiler room for fire and explosion hazard is “G”, the pump room is “D”. For a relative mark of 0,000, the mark of the clean floor of the boiler house was taken, corresponding to the absolute mark of +1,760 m in the Baltic system of heights.

Basic equipment. Boilers Buderus Logano GE515 - 2 pieces, equipped with combined two-stage burners GKP-80Н from Oilon, were accepted for installation. 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 taking into account the loads for heating, ventilation and hot water supply, the loads for own needs and heat losses in heating networks at the maximum winter operation of the boiler house. Buderus Logano GE615 - low-temperature cast iron heating boilers for diesel fuel or gas with smooth regulation of boiler water. 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. Rated heat output of the Buderus Logano GE515 boiler is 510 kW. The excess operating pressure of the heat carrier in the boiler is 3,5 bar, the operating temperature is 110 ˚С. Efficiency 92%.

Technical characteristics of boilers. Rated heat output kW 510; Thermal power of combustion kW 547,8; Flue gas temperature ºС 174; Flue gas mass flow (for gas) kg/s 0,233; CO2 content (for gas) % 10; Required pressure (thrust) Pa 0; Gas outlet resistance mbar 3,1; Permissible flow temperature ºС 115; Permissible overpressure bar 6; Gas volume l 745; The volume of water l 438; Weight, net kg 2060; The boilers are delivered to the facility in separate sections. Installation is carried out in strict accordance with the manufacturer's instructions.

layout solutions. The technically re-equipped boiler house is designed in an existing building. The boiler room has two rooms: a boiler room and a pump room. For the convenience of delivery and bringing into the boiler room, the boiler units are supplied in separate sections. 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, the floors are being replaced with the installation 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. The boilers are located in the central part of the boiler room at +0,100 m relative to the clean floor of the boiler room. In the upper right part (according to the plan) of the boiler room in the axes "D - B" the expansion line equipment is located: an intermediate wall-mounted tank and membrane tanks (one above the other). In the upper left part (according to the plan) of the boiler room, there is a hot water storage tank and DHW circuit pumps. To the left of the boilers between axes B and C, gas ducts are provided for the removal of combustion products. To the right of the entrance to the boiler room along axis "3" there is a zone for accounting for the parameters of the heat carrier of the DHW circuit and the output of heat networks to the consumer. In the pump room there are: between the axes B and C at the level of +1,600 m, blocks of network pumps, as well as a zone for accounting for the parameters of the coolant of the network circuit; blocks of booster pumps at + 1,560m along the axis "2" (in the lower right corner according to the plan), as well as a wall-mounted expansion tank Reflex DE; heat-exchange equipment of the network circuit, the cold water system, as well as the zone for supplying and accounting for source water between axes A and B. The boiler room for the production site is classified as “G”, the pump room - “D”. The degree of fire resistance of the boiler room is I. The boiler room has one independent exit.

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. The connection of the DHW system is carried out through heat exchangers, through a 2-pipe system with a circulation pipeline. Hot water boilers heat the coolant up to 110 ˚С, which goes to the network heat exchangers (2x597 kW), hot water heat exchangers (2x145 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 two Wilo IL 50/160-0,75/4 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) pumps Wilo IL 80 / 130-5,5 / 2, equipped with a VFD system to maintain the required pressure values ​​in the direct pipeline. The pressure of the network pumps was obtained based on the hydraulic calculation of the heat network. To maintain pressure in the boiler, network and DHW circuit, a block of two (one working, one standby) booster pumps Wilo MVI 406/PN25 3~ is provided, installed after the source water inlet unit. To prevent frequent switching on and off of boilers in summer mode, a 2000 l Reflex LS hot water storage tank is used in the DHW circuit, equipped with shutoff valves, instrumentation and a titanium anode, which provides long-term protection against corrosion and does not require maintenance.

Water treatment plant. The water treatment system is designed for a boiler house with hot water boilers, for the needs of feeding the boiler circuit, the network circuit and the DHW 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.