A Detailed Introduction to the Ventilation Control of the Rotary Kiln

时间:2021-07-28 作者 :超级管理员

We all know that the combustion of materials in the rotary kiln requires sufficient oxygen, and the infusion of oxygen is usually achieved by ventilation. Ventilation is one of the two material conditions reflected by combustion. Without proper amount of oxygen for fuel combustion, heat cannot be released. It is impossible to maintain a suitable temperature. Therefore, if you want to use the rotary kiln well, you must control the ventilation volume. The following is a detailed introduction about the ventilation volume control of the rotary kiln.

  Under normal circumstances, when the ventilation rate is small, the oxygen supply is insufficient, the combustion speed slows down, and the heat consumption increases; when the ventilation rate is large, the gas flow rate increases, the combustion decomposition time becomes shorter, and the flue gas volume after combustion is large, and the heat consumption is high. This will affect the normal operation of the kiln. Therefore, the ventilation of the rotary kiln should be controlled.

  Under normal conditions, the tail fan of the system runs stably to exhaust air, and the ventilation in the kiln and furnace is basically stable. But there are also some factors that affect the ventilation, such as the resistance change of the entire system, the temperature of the air entering the kiln, whether the system is leaking and whether the fan inlet is mixed with cold air, whether there is dust accumulation in the pipeline, blockage or whether the material is evenly distributed, the kiln and the furnace. Whether there is interference in the system, etc. These factors will affect the ventilation of the kiln, so the ventilation must be adjusted and controlled in time.

   In view of the above influencing factors, the ventilation volume should be adjusted and controlled in a targeted manner. For example, when the resistance of the system changes, the fluid resistance of the system should be adjusted in time to ensure the output air volume. When the temperature of the air entering the kiln changes, it must be controlled within an appropriate range. For air leakage in the system and cold air at the inlet of the fan, the system should be overhauled to find out the air leakage and deal with it. For dust accumulation, blockage or uneven material distribution in the pipeline, the pipeline needs to be cleaned in time, and the problem can be solved by evenly spreading the material. Regarding the interference of the two systems of the kiln and the furnace, the ventilation volume of the two systems can be adjusted and balanced by setting the kiln tail gate and the flue necking. If the total air volume of the whole system is too large, it is more convenient to adjust on the pipeline after the two systems merge.

   In production, realize the control of ventilation. It is necessary to accurately measure the amount of ventilation, and the measurement method can be judged by observing the negative pressure of the ventilation inlet of a device. Only under the premise of accurately measuring the size of the ventilation, the ventilation of the kiln can be controlled to maximize the working capacity of the rotary kiln.