Technical task of a gas boiler room for a warehouse complex
Helped the customer to make the Technical specification for the design of the boiler room warehouse complex.
DESIGNING A BOILER ROOM
1. GENERAL DATA
1.1 Basis for design: contract
1.2 Type of construction: reconstruction.
1.3 Phasing design: project, working documentation.
2. General project requirements
The designed boiler house is intended for heat supply of the warehouse complex.
2.1. The boiler room is located in a separate brick building located on the territory of the first construction stage. The dimensions of the machine room of the boiler room are - 18m * 12m * 5.7m (h).
2.2. The reconstruction of the boiler house consists in adding generating capacities (boiler LOOS UNIMAT UT-L 5200 kW) in order to provide heat supply to the facilities of the first and second construction stage.
2.3. Energy Consumers
2.3.1. The facilities of the first construction stage, the heat supply of which is provided by the existing technological equipment of the boiler house, remains unchanged. The maximum heat load is 2908 kW (2.5 Gcal / h).
2.3.2. Objects of the second construction stage, the heat supply of which is provided by newly installed technological equipment. The energy from the boiler house is transmitted via heating networks to the ITP ABC of the second construction stage, in which independent connection of the AE systems and connection of the closed HWS systems (first and second zones) is provided. DHW heating is carried out by a system of two pipelines (supply and return). The heat supply systems of the fuel supply system are carried out by a system of four pipelines (two supply and two reverse) in order to supply heat (in the cold period of the year) and cold (in the warm period of the year) through the same pipelines. At the same time for the supply of heat and cold provides for the use of the same pumps.
The power of heat consumers is: - 8092 kW (6.957 Gcal / h).
Of them: Heating and ventilation - 6708 kW (5.777 Gcal / h);
Hot water supply - 1384 kW (1.090 Gcal / h)
Heat supply absorption chillers (in the warm season) -
4965 kW (4,269 Gcal / h).
2.3.3. The maximum heat load of the complex consumers is 11,000 kW (9.46 Gcal / h).
2.4. Parameters of heat carriers.
2.4.1. For objects of the first stage of construction:
Temperature
- for heating, ventilation and air-heat curtains - 100 ° C - 68 ° C with high-quality regulation depending on the outdoor temperature;
- for DHW - 55 ° C.
2.4.2. For objects of the second construction phase:
- Heating, ventilation and air-heat curtains.
Temperature - 100 ° C - 68 ° C with high quality regulation depending on the outdoor temperature;
Head loss - 30 m.
-Hot water supply.
Temperature - 100 оС-68 оС constantly throughout the year;
Head loss - 30 m.
- Heat supply absorption chillers.
Temperature - 100 ° C - 90 ° C constantly throughout the year;
Head loss - 30 m.
2.5. The gas pressure at the input to the boiler -4500 mm.st.st.
2.6.The boiler room must be equipped with the necessary elements and engineering systems to ensure the safe and reliable operation of heating systems without permanent stay of the staff.
3. Requirements for the heat and power part of the boiler house
3.1. Structure of the equipment of a water-heating boiler room:
The boiler room should include:
n boilers with water temperature up to 115 ° С, pressure up to 0.6 MPa with gas burning devices (two existing ones are new);
n circulating pumps (existing and new);
n DHW heat exchanger (existing)
n expansion tanks (existing and new);
n pipelines and fittings (shut-off and control);
n gas equipment of the boiler room (existing and new);
n water treatment plant (existing);
n electrical equipment (electrical panel, electricity metering, switching equipment);
n automatic control system, alarm and protection of the boiler room;
n fire alarm systems (existing);
n instrumentation, including heat metering and coolant and water consumption;
n ducts, chimneys;
PROJECT DOCUMENTATION OF THE BOILER ROOM
3.2. Provide for manual switching of external networks from heating to cooling and back.
3.3. Equip the boiler room with a heating and ventilation system, as well as a fire alarm system and fire fighting equipment.
3.4. The automatic control, protection and alarm system of the boiler room must provide:
n safe operation of the boiler house without the constant presence of staff;
n automatic, high-quality regulation of heat supply depending on the outdoor air temperature for the air conditioning systems and the needs of the hot water supply system for consumers of the first construction stage;
n automatic, high-quality regulation of heat supply for the HV systems, depending on the outdoor temperature, maintaining constant parameters of the heat supply of the DHW system for consumers of the second construction stage;
n the shutdown of gas-consuming equipment (boilers) for fuel in emergency situations (fire, gas pollution, power outages);
n alarm system about emergency shutdowns of the boiler room, equipment condition and technological parameters.
4. Requirements for engineering support boiler
4.1. Gas supply with natural gas in accordance with the specifications of the State Unitary Enterprise MOSOBLGAZ.
4.2.Water supply to the boiler house - from the household drinking water supply system of the complex. Water pressure - 50 m. Water treatment - existing 1,5m 3 / h. Drainage - existing.
4.3. Provide heating and ventilation to the boiler room due to the increase in its capacity.
4.4.Electrical supply of own needs of the boiler house (220/380 V, 50 Hz). Reliability of power supply - in category I. Entries provided by the customer.
4.5. Working and emergency lighting - existing.
4.6. Lightning protection of the boiler room, grounding, system for preventing unauthorized access - existing.
4.7. The boiler room automatic control system should provide the following functions:
4.7.1. Automatic feeding of the boiler water circuit.
4.7.2. Automatic switching of pumps from operating to standby and periodic changing of working and standby pumps.
4.7.3. Sequential switching on of boilers with increasing heat load and switching them off with decreasing heat load (cascade control).
4.7.4. Automatic closing of the high-speed shut-off valve on the gas supply to the boilers:
at blackout;
at a gas-supply signal of a boiler room - at a gas concentration of a room more than 10% of the lower flammability limit of natural gas;
with unauthorized access inside.
4.7.5.Automatic safety, automatically stopping the supply of fuel to the burners when:
a) increase or decrease the pressure of the gaseous fuel before the burners;
b) extinguishing the torch torch;
c) the temperature of the water leaving the boiler rises above 110 ° C;
d) increasing the water pressure at the outlet of the boiler above 6 bar;
e) in case of gas pollution of the premises more than 10% of the lower flammability limit of natural gas;
e) when fire alarm is triggered.
When these protections are triggered, the boiler room must be started only by personnel.
4.7.6. In the event of a power outage and the restoration of its supply, the boiler room shall start automatically.
4.8. Automation and dispatching systems to perform (expand) on the basis of equipment company "Honeywell".
5. Requirements for architectural and construction, space-planning and design solutions
5.1. The premises of the boiler rooms are classified as explosion and fire hazard category G in accordance with the NPB 105-95. The degree of fire resistance of all rooms should be - II.
5.2. The floors in the rooms of the boiler room and the heating point must be made of non-combustible materials and have slopes for the drainage of fluid to the trays, ladders.
5.3. Additional technological equipment is located in the engine room of the existing building of the boiler house.
6. Requirements for the organization of the design work.
6.1. Design boundaries
- head valves thermal networks;
- introductory valve of the gas pipeline to the boiler room;
- introductory water supply valves to the boiler room;
- output valves for heat supply of hot water supply system;
- releases of sewage in the boiler room.
- inputs to the board of power supply and control of the boiler room.
6.2. The design of a power unit should be carried out in accordance with the requirements of the following regulatory documents:
- SNiP II-35-76 with amendment No. 1 “Boiler installations. Design standards ”;
- SNiP 42-01-2002 "Gas distribution systems"
- SNiP 41-02-2003 “Heating networks”;
- SNiP 41-01-2003 “Heating, ventilation and air conditioning”;
- SNiP 2.09.04-87 * "Administrative and residential buildings";
- SNiP 31-03-2001 "Industrial buildings";
- "Guidelines for the design of autonomous sources of heat supply" - the Government of Moscow, Moscow City Architecture Committee;
- “Safety rules for gas distribution systems and gas consumption.” PB 12-529-03 ”;
- "Rules for electrical installations";
- “Rules for the Construction and Safe Operation of Steam Boilers with a Steam Pressure up to 0.07 MPa and Hot Water Boilers with a Water Temperature up to 115 ° C”
- “Rules for the design and safe operation of steam and hot water boilers. PB 10-574-03 »