The Combustion Process of Fuel Gas Burners
The Combustion Process of Fuel Gas Burners
The burner structure of fuel gas burners can be designed with various flame shapes, which can make the flame shape cylindrical to ensure the uniformity of the temperature field in the furnace. The flame shape and flame length can be designed according to user requirements. What is its combustion process? The following is the organization of the burning process:
1. Blowing. It means to open the air door and let the fan blow fresh air into the combustion chamber, displacing the flammable and explosive gas in the combustion chamber, preventing explosion accidents from happening when igniting. The typical time is 15-30 seconds. For open “burning chambers” or locations where temperature control stability requirements are low, this step may be absent or very short, and the burner is generally not powerful, and a multi-channel system is often used, both for explosion prevention and for reducing the probability.
2. Pre-burning. The air door is opened to the小火burning position, and only an electric spark is ignited, and the gas valve is not opened. This step is usually set for protection. The burner also detects whether the combustion is normal, and if normal, it locks and warns. Generally, if the gas valve leaks, it will not be clean enough for blowing. At this time, an electric ignition may cause a flame, and the burner flame detection system will detect an unwanted flame, causing the burner to lock and warn. Even without this function, if it can be ignited, it can reduce the risk of gas accumulation.
3. Combustion. This step lasts for 3-5 seconds and is called the “combustion time” by all programmable controllers. During this time, the air door is at the小火position, and the gas valve is opened to allow the burner to release an electric arc continuously. During this period, the gas must be ignited. Once ignited, it enters the normal combustion and power adjustment stage. If ignited, the burner stops working and does not release an electric arc. If it does not ignite, it will be locked and warned immediately. It needs to be restarted after debugging manually. Domestic kitchen burners for small machines do not have programmable controllers. In order to prevent combustion failure, the burner always remains in operation, and allows gas to be ignited as soon as possible to prevent agglomeration.
The combustion status of fuel gas burners is detected and controlled by a flame automatic tracking system. If there is a fault in the combustion process, the control system issues instructions, quickly closes the gas valve of the supply system, cuts off the gas power supply, stops the burner after automatic blowing, indicating a fault.