How is the flue gas flow regulated in a coke oven flue damper valve?

The coke oven flue gate valve plays a pivotal role in regulating flue gas flow during coke oven production. To comprehend how this valve modulates flue flow, one must first understand its structure and operating principle.

The coke oven flue gate valve primarily comprises a valve body, piston, actuating mechanism, and sealing assembly. The valve body is typically constructed from high-temperature-resistant materials to ensure effective sealing. The actuating mechanism controls valve opening and closing via an electric motor, gear reducer, and transmission system.

When adjusting flue gas flow, the actuating mechanism drives the piston along guide rails to alter the gate plate's position. This position determines the cross-sectional area through which flue gas passes, thereby influencing flow velocity and volume. Concurrently, the valve's sealing assembly prevents gas leakage during adjustment.

Adjustment Procedure:

Determine Requirements: First, ascertain the coke oven's current operational status and the required flue gas flow rate. This is typically determined based on the oven's heating schedule, excess air coefficient, and gas combustion conditions.

Prepare Tools: Readily assemble lifting equipment (such as a hand chain hoist) and other necessary tools and apparatus.

Adjusting the Damper Plate: Raise or lower the damper plate using the hoisting device to alter its position within the flue cross-section. Raising the plate reduces the obstructed area, increasing flue suction and flow rate; lowering it increases the obstructed area, decreasing flue suction and flow rate.

Seal inspection: Following adjustment, verify the valve's sealing integrity to ensure no flue gas leakage occurs.

This method enables precise control of coke oven flue gas flow rates to accommodate varying production requirements. Concurrently, maintaining valve stability and efficiency during adjustment is essential to safeguard normal coke oven operation and ensure safe production practices.