Regenerative aluminum melting furnace and regenerative combustion system

【China Aluminum Network】 Regenerative combustion system includes: a pair of regenerators, a pair of ignition burners, a pair of regenerative burners; reversing device; fuel, air and smoke pipelines; various manual, Electric control valve; blower, induced draft fan; furnace temperature, furnace pressure detection components and automatic control systems.

Advantages: The heat recovery of the flue gas reaches the limit, the flue gas temperature reaches ≤150°C; the combustion efficiency is close to 90% due to the reduction of the flue gas temperature; the greenhouse gas regenerative burner is reduced: the ignition system with super stable stability and flame stability The device will not explode when operated. The optimal design of air-fuel ratio allows for more complete combustion and greater fuel savings. The regenerator adopts ceramic ball. The regenerator has self-cleaning dust and slag, small resistance, easy removal and cleaning, repeated use, high heat storage efficiency, and normal life expectancy of more than one year.

Rapid fuel pulse valve: The solenoid valve of the American honywell company is used. The solenoid valve closes faster than the pneumatic valve and can be turned on and off frequently.

Reversing device: Air/flux two-position two-way valve (or pneumatic quick shut-off valve is used). The switching time is about 1 time/min, and the constant temperature reversing mode is adopted. The normal service life is more than two years.

Exhaust system: Exhaust system consists of two general valves for air/flue gas, flue gas flow control valve, exhaust pipe, and high-temperature induced draft fan. The temperature resistance is 200°C.

Supply system: According to my company's specially selected high-pressure fan, with flow regulation.

Regenerative combustion system main detection and control parameters 1, furnace temperature control, display;

2, aluminum liquid temperature measurement and display;

3, smoke temperature detection, display, when the temperature exceeds 200 °C, the system forced commutation;

4, furnace pressure control and display;

5, air, gas pressure low alarm, display and cut off gas;

6、Reversing valve commutation in place display and not in place alarm, interlock function;

7, blower, induced draft fan outage, gas quick disconnect valve interlock function;

Regenerative combustion system advantages:

1, the heat recovery of flue gas reaches the limit, the temperature of flue gas ≤ 150 °C;

2, due to lower exhaust temperature, fuel energy utilization rate close to 90%;

3. Reduce 30 to 40% of greenhouse gas CO2 emissions;

4. Burning adopts the intensive burning method, which reduces the flame temperature, improves the surface blackness of the aluminum liquid, and increases the melting rate.

Regenerative Burner Control Description This control system consists of Siemens S7-200 series PLC (programmable controller), a pneumatic gas quick disconnect valve, four pneumatic air two-way valves and a set of air/flue gas proportional pulse valve, etc. Composed of the combustion commutation control part; Siemens touch display, fuel electric control valve, inverter and other components together constitute the combustion temperature automatic control; also has a variety of chain alarm function.

The continuous regenerative combustion system directly detects the main orifice natural gas flame, and the burner ignition also directly targets the main natural gas ignition. The burner flameout immediately shuts off the solenoid valve. In order to improve the safety performance of the burner, two flame detections were set up, ion flame detection and ultraviolet flame detection. The presence of near-field flames will be detected. Improve the stability and reliability of combustion equipment.

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