Flue design requirements for oil and gas boiler rooms:

　　1. The flue should be straight, with good air tightness, fewer accessories and less resistance. The horizontal flue should be laid out at a height of more than 1% when laying, and it should be arranged along the slope as far as possible.

　　2. The flue and chimney of the oil and gas boiler room should be constructed of steel or reinforced concrete, and the flue and chimney should be equipped with water-sealed cold air and water drainage pipes.

　　3. The thickness of the steel plate of the metal flue is generally 4~6mm. When designing the flue, sufficient reinforcement ribs should be configured to ensure the strength and rigidity requirements.

　　4. The thermal expansion of the flue should be compensated, and the compensation amount should be calculated and selected correctly.

　　5. The steel flue should be insulated and reliably fixed.

　　6. ​​One boiler for oil and gas boiler houses should correspond to one chimney. When conditions are restricted and several boilers need to share a flue or chimney, the ventilation power of each boiler should be balanced.

　　7. The necessary thermal measurement points and environmental protection measurement points should be set at appropriate locations when the flue is arranged. A single oil-fired boiler with a rated evaporation capacity greater than or equal to 20t/h or a single rated thermal power greater than or equal to 14MW must be equipped with a fixed instrument that continuously monitors the concentration of soot and SO2 in the flue gas.

　　8. In places where flue gas is easy to gather and when multiple boilers share a chimney or a general flue, an explosion-proof door should be installed on the flue behind each oil-fired gas boiler, and the position of the explosion-proof door should be conducive to pressure relief. It should be located at an appropriate location that does not endanger the safety of personnel and before turning. When explosive gas may endanger the safety of operators, a pressure relief guide pipe should be installed on the explosion-proof device.

　　9. For some boiler houses with long flues, the resistance should be calculated, and the corresponding blowers and induced draft fans (when there are induced draft fans) are selected to ensure smooth exhaust.

　　10. Corresponding anti-corrosion measures should be considered for the chimney. The flue gas temperature at the chimney outlet should be 15°C higher than the flue gas dew point temperature; when the exhaust gas temperature is lower than the flue gas dew point temperature, effective measures should be taken to prevent the flue gas from flowing back.