Direct heating combustion system

Example: Melting furnaces in the aluminum processing industry

Composition of Continuous Regulating Heating System

1. Pressure regulation, measurement and safety system of gas main pipe

2. Ball valve

3. Gas solenoid valve

4. Connect the air/fuel ratio valve to the gas solenoid valve

5. Manually adjust the plug valve

6. Bellows connection components

7. Gas burner

8. Combustion fan

9. Connect the orifice plate to the differential pressure switch

10. Pressure switch

11. Pressure gauge with protective button

12. Air disc valve connected to electric actuator

13. Air flow regulating disc valve

14. Automatic controller for ignition transformer and burner

principle

When the pressure regulation, measurement, and safety cut-off system (1) of the gas main is put into normal operation, the automatic control system of the burner can start running; The burner automatic controller (14) starts the gas solenoid valves (3 and 4) to open; At the same time, the ignition transformer (14) is connected, and ignition sparks appear near the nozzle of the burner (7); The air disc valve (12) is at the ignition opening, and an appropriate amount of combustion air flows towards the burner (7). Adjust the outlet pressure of the gas end through the pressure pipe of the air/fuel ratio valve (4). As the heat load continues to increase, the opening of the electric disc valve (12) will continuously increase, and the rising pressure of the combustion air through the pressure pipe of the air/fuel ratio valve (4) will cause the outlet pressure of the gas end to increase. The gas manual adjustment plug (5) and the air manual adjustment plug (13) regulate the maximum gas and air flow.