XINLI BOILER

Precautions for ignition of biomass chain grate boilers

28 Dec, 2021

　　This article mainly introduces the precautions for the ignition of biomass chain grate boilers. In particular, it is necessary to pay attention to the temperature rise not too fast during the ignition, so as to avoid uneven heating of various components, resulting in excessive stress, which affects the service life of the boiler!

　　1. The boiler should undergo a comprehensive inspection (including related accessories and pipes) before the fire starts, and then carry out the water supply work. Before the water enters, the drain valve must be closed, and the bleed valve of the upper drum must be opened so that the air in the boiler can be discharged.

　　2. The treated water is slowly injected into the boiler through the economizer, and the inlet water temperature is generally not higher than 40°C.

　　3. When the fire is rising, open the ignition door, place firewood and other ignitors at the front end of the grate (no iron nails are allowed) to ignite, open the large induced draft fan flue gas regulating door, increase natural ventilation, and adjust after the ignitor burns. The small flue gas regulating door, open the induced draft fan intermittently, when the pilot material is burning vigorously, start manual feeding, then the blower can be turned on. When the material bed burns vigorously, you can close the ignition door, add material to the hopper, open the grate intermittently, and strengthen the observation of the fire situation at the left fire setting hole, and properly perform the fire setting. After the front arch is hot and the material can catch fire continuously Adjust the blast air volume, the negative pressure of the furnace is maintained at 20-30Pa, so that the combustion gradually becomes normal.

　　4. It is not advisable to increase the temperature too fast when the fire is raised to avoid excessive thermal stress caused by different parts of the heat, which will affect the life of the boiler. The time for the first fire to rise from the cold furnace to the water temperature rise to the working temperature is 10~12 hours. It is advisable that, unless there are special circumstances, the cooling furnace should not be less than 5 hours, and the heating furnace should be no less than 1 hour.

　　5. When the pressure rises to 0.2~0.3MPa, check whether the manhole and hand hole cover are leaking. If there is leakage, tighten the manhole and hand hole cover bolts, and check whether the drain valve is tight and leak-free.

　　6. When the pressure and temperature in the boiler gradually increase, attention should be paid to whether each part of the boiler has special noise. If there is any special noise, it should be checked immediately. If necessary, the boiler should be shut down for inspection immediately, and the operation can be continued after the fault is removed.