Start-up of the hot blast stove
Thread Content
What should be considered when starting up a hot blast stove? And how is the air-fuel ratio calculated?
When driving, pay attention to the inerting of the system; the oxygen level and the levels of flammable and explosive gases within the system must not exceed allowed limits. The air-fuel ratio can be calculated based on the components of the fuel gas to determine the amount of air required for complete combustion, with fine adjustments made after ignition.
1. Start the drum exhaust fan to create negative pressure in the furnace chamber； 2. Take samples of the gases in the furnace chamber for explosion testing ； 3. The amount of air is calculated based on the fuel composition; in most burners, gas and air are adjusted in conjunction with each other, and the air flow rate is automatically adjusted according to the level of gas flow ；
Turn on the blower and use a high airflow to purge the system for a certain period of time, in order to remove combustible gases. Calculate the air volume based on the specific fuel composition.
The air-to-fuel ratio is approximately 10-8:1, and it needs to be adjusted based on the online CO level after combustion in the bag filter.