The specifications of diesel generator exhaust pipe mainly consider the exhaust resistance of the diesel engine. It can be larger than the interface of the diesel engine itself. However, taking into account factors such as pipe length, noise reduction and headroom. other unit interfaces, it is generally 1.5 to 2 times the diameter of the exhaust pipe of a diesel engine, the diameter of an 800 kW engine is estimated to be 300 to 400 mm.
What is the problem of installing the exhaust pipe of the diesel generator?
The ventilation of the diesel generator room includes two parts: daily ventilation and working ventilation.
Daily ventilation: the number of ventilations in the engine room of air-cooled and water-cooled generators should be 6 times, and the number of ventilations in the oil storage room should not be less than 3 times.For computer rooms that use gas fire suppression systems, after a fire, this ventilation system is responsible for exhausting indoor exhaust gases, but it is not accidental ventilation. To ensure personal safety, it is recommended to set the start button for accidental ventilation.
Working ventilation: Water-cooled diesel generators must consider the amount of air required for oxygen consumption in operation; Air-cooled generators have a large volume of cooling air and generally use a natural air intake. Diesel engines have their own fan. pressure emissions, but diesel generators The pressure height of the built-in fan is only about 150 Pa. When the shaft resistance is large, a fan should be added to overcome the shaft resistance. the air inlet shaft is large, a ventiair inlet lator is added; if the exhaust shaft resistance is large, an exhaust fan is added.
The diesel generator room uses a gas fire extinguishing system. Solenoid valves should be installed on the air inlet and exhaust channels. When a fire occurs in the diesel generator room and gas fire extinguishing is triggered, these valves will be closed. in a chain to ensure the extinguishing effect.
Diesel generator exhaust is a pressurized exhaust with high combustion gas temperature and high air flow velocity. Combustion gases must be vented at high altitude. The flue must be thermally insulated and equipped with a shock-absorbing support. should be installed.
Diesel generator rooms should pay attention to ventilation and smoke exhaust, otherwise it will affect the use of the generatort will cause damage to the generator. For businesses that cannot afford power outages, generator damage is very serious. bad thing.
There are two commonly used methods for laying exhaust pipes: ① Horizontal overhead laying, which has the advantages of fewer turns and low resistance. The disadvantage is that it increases internal heat dissipation and increases resistance. computer room temperature; ② Ground trench The advantage of internal laying is that the internal heat dissipation is small, but the disadvantage is that the exhaust pipe has many turns and the resistance is relatively large. Horizontal overhead installation is commonly used in high-rise buildings. The exhaust pipe should be exited separately to minimize kinks. The temperature of the exhaust fumes is between 350 and 5,500°C. To avoid theTo avoid burns and reduce radiant heat, the exhaust pipe must be insulated. Generally, it is not necessary to have a suspended ceiling in the computer room. It doesn't matter even if the ceiling is 50-60 degrees, because the suspended ceiling material is non-combustible or difficult to burn. It should be noted that there must be a certain distance from other pipes in the ceiling.