Small suction power or large air door, which one is more reasonable? Large suction power or small air door
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The control of heating system suction and air volume, and the matching of air volume and gas volume are very important. Let’s discuss how to make it more reasonable. :handshake
This adjustment should take into account that large suction and small damper pressure of the fire hole may cause negative pressure in the fire hole, causing air to enter the vertical fire channel, affecting the temperature of the upper part of the vertical fire channel and causing coking. However, a small suction and large air door will cause the positive pressure of the fire hole to be too large, which will bring danger and difficulty to the temperature measurement.
Generally, a small suction and large air door can ensure the temperature of the stove. What do you think?
You are right, but there is a limit. The reason why the small suction and large damper can ensure the temperature of the burner is to ensure that the pressure of the flame hole is positive to prevent air from entering.
The pressure of the fire hole is generally maintained at a slightly positive pressure of 0~5Pa. If the pressure is negative, it is easy for coal dust to enter during temperature measurement. Coal dust cannot enter under a slightly positive pressure.
What the people above are saying makes sense. When the fire hole pressure is maintained at a positive pressure, the air excess coefficient must be reasonable. Does the poster's coke oven have two points? If so, it is recommended to keep the fire hole pressure slightly larger. The lateral pressure distribution in the combustion chamber of the two-part coke oven is uneven compared with the two-part coke oven, and the heating system generates greater resistance. Especially for older coke ovens, a slightly larger air inlet should be maintained.
Mainly a positive and negative proportional relationship
Agree with the idea of small suction and large damper.
There are some problems with large suction and small damper. First, the gas direction in the regenerator is diagonal. This will cause the furnace head temperature to be unreasonable and the flame hole pressure to be negative. There are also some problems with the operation of the small suction and large air door. The pressure of the fire hole is slightly positive, and there are some problems with high-direction heating. Therefore, the suction is adjusted based on the pressure of the fire hole. The amount of gas depends on the air excess coefficient.